./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e24917ef8695200a643e71e238ee3c2cc9fb2120 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e24917ef8695200a643e71e238ee3c2cc9fb2120 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:33,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:33,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:33,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:33,703 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:33,704 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:33,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:33,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:33,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:33,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:33,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:33,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:33,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:33,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:33,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:33,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:33,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:33,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:33,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:33,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:33,722 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:33,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:33,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:33,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:33,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:33,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:33,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:33,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:33,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:33,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:33,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:33,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:33,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:33,730 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:33,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:33,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:33,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:33,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:33,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:33,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:33,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:33,735 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-10-22 11:21:33,745 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:33,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:33,746 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:33,746 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:33,747 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:33,747 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:33,747 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:21:33,747 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:33,748 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:33,748 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:21:33,748 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:21:33,748 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:33,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:33,749 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:33,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:33,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:33,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:33,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:33,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:33,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:33,750 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:33,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:33,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:33,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:33,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:33,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:33,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:33,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:33,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:33,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:33,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:33,752 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:21:33,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:21:33,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:33,752 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:33,753 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan 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 -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e24917ef8695200a643e71e238ee3c2cc9fb2120 [2019-10-22 11:21:33,776 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:33,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:33,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:33,790 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:33,790 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:33,791 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2019-10-22 11:21:33,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data/b2b1b3212/5980895665b1413bba37926155eb9667/FLAGd64463516 [2019-10-22 11:21:34,263 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:34,264 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/sv-benchmarks/c/pthread/triangular-longer-1.i [2019-10-22 11:21:34,275 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data/b2b1b3212/5980895665b1413bba37926155eb9667/FLAGd64463516 [2019-10-22 11:21:34,286 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data/b2b1b3212/5980895665b1413bba37926155eb9667 [2019-10-22 11:21:34,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:34,289 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:34,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:34,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:34,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:34,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b5808b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34, skipping insertion in model container [2019-10-22 11:21:34,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,305 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:34,339 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:34,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:34,674 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:34,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:34,765 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:34,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34 WrapperNode [2019-10-22 11:21:34,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:34,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:34,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:34,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:34,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:34,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:34,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:34,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:34,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... [2019-10-22 11:21:34,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:34,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:34,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:34,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:34,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/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 [2019-10-22 11:21:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-10-22 11:21:34,907 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-10-22 11:21:34,907 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-10-22 11:21:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-10-22 11:21:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 11:21:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-10-22 11:21:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:21:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:21:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-10-22 11:21:34,908 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:34,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:34,910 WARN L202 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-10-22 11:21:35,242 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:35,243 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-22 11:21:35,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:35 BoogieIcfgContainer [2019-10-22 11:21:35,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:35,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:35,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:35,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:35,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:34" (1/3) ... [2019-10-22 11:21:35,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722dfa0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:35, skipping insertion in model container [2019-10-22 11:21:35,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:34" (2/3) ... [2019-10-22 11:21:35,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722dfa0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:35, skipping insertion in model container [2019-10-22 11:21:35,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:35" (3/3) ... [2019-10-22 11:21:35,251 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-10-22 11:21:35,279 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,279 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,279 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,279 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,279 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,280 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,280 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,280 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,280 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,280 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,280 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,280 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,281 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,281 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,281 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,281 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,281 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,281 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,281 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,282 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,282 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,282 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,282 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,282 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,282 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,283 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,283 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,283 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:35,298 WARN L141 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-10-22 11:21:35,298 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:35,307 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:35,319 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:35,338 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:35,338 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:35,338 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:35,338 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:35,339 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:35,339 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:35,339 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:35,339 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:35,350 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 48 transitions [2019-10-22 11:21:35,433 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2019-10-22 11:21:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2019-10-22 11:21:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 11:21:35,446 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:35,446 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:35,448 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:35,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:35,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1918718107, now seen corresponding path program 1 times [2019-10-22 11:21:35,462 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:35,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170384738] [2019-10-22 11:21:35,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:35,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:35,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:35,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170384738] [2019-10-22 11:21:35,840 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:35,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:21:35,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619427326] [2019-10-22 11:21:35,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:21:35,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:21:35,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:21:35,866 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2019-10-22 11:21:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:36,002 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2019-10-22 11:21:36,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 11:21:36,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-22 11:21:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:36,020 INFO L225 Difference]: With dead ends: 1777 [2019-10-22 11:21:36,020 INFO L226 Difference]: Without dead ends: 499 [2019-10-22 11:21:36,028 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:21:36,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-10-22 11:21:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2019-10-22 11:21:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2019-10-22 11:21:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2019-10-22 11:21:36,098 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2019-10-22 11:21:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:36,098 INFO L462 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2019-10-22 11:21:36,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:21:36,099 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2019-10-22 11:21:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:21:36,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:36,100 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:36,100 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash 160945497, now seen corresponding path program 1 times [2019-10-22 11:21:36,101 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:36,101 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210441080] [2019-10-22 11:21:36,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:36,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:36,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:36,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210441080] [2019-10-22 11:21:36,197 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:36,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:21:36,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612321278] [2019-10-22 11:21:36,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:21:36,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:36,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:21:36,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:21:36,200 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2019-10-22 11:21:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:36,333 INFO L93 Difference]: Finished difference Result 562 states and 1391 transitions. [2019-10-22 11:21:36,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 11:21:36,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-22 11:21:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:36,338 INFO L225 Difference]: With dead ends: 562 [2019-10-22 11:21:36,338 INFO L226 Difference]: Without dead ends: 353 [2019-10-22 11:21:36,339 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-22 11:21:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2019-10-22 11:21:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2019-10-22 11:21:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-10-22 11:21:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 882 transitions. [2019-10-22 11:21:36,368 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 882 transitions. Word has length 22 [2019-10-22 11:21:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:36,369 INFO L462 AbstractCegarLoop]: Abstraction has 353 states and 882 transitions. [2019-10-22 11:21:36,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:21:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 882 transitions. [2019-10-22 11:21:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 11:21:36,370 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:36,370 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:36,370 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:36,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:36,370 INFO L82 PathProgramCache]: Analyzing trace with hash -509840719, now seen corresponding path program 1 times [2019-10-22 11:21:36,371 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:36,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456886526] [2019-10-22 11:21:36,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:36,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:36,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:36,504 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456886526] [2019-10-22 11:21:36,504 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:36,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 11:21:36,504 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583177528] [2019-10-22 11:21:36,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 11:21:36,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:36,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 11:21:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 11:21:36,505 INFO L87 Difference]: Start difference. First operand 353 states and 882 transitions. Second operand 5 states. [2019-10-22 11:21:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:36,541 INFO L93 Difference]: Finished difference Result 430 states and 1036 transitions. [2019-10-22 11:21:36,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 11:21:36,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-22 11:21:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:36,543 INFO L225 Difference]: With dead ends: 430 [2019-10-22 11:21:36,543 INFO L226 Difference]: Without dead ends: 300 [2019-10-22 11:21:36,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-10-22 11:21:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2019-10-22 11:21:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2019-10-22 11:21:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 708 transitions. [2019-10-22 11:21:36,554 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 708 transitions. Word has length 22 [2019-10-22 11:21:36,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:36,555 INFO L462 AbstractCegarLoop]: Abstraction has 287 states and 708 transitions. [2019-10-22 11:21:36,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 11:21:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 708 transitions. [2019-10-22 11:21:36,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 11:21:36,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:36,556 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:36,556 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1011235803, now seen corresponding path program 1 times [2019-10-22 11:21:36,557 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:36,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399335737] [2019-10-22 11:21:36,557 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:36,557 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:36,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:36,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399335737] [2019-10-22 11:21:36,674 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:36,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 11:21:36,675 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514996048] [2019-10-22 11:21:36,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 11:21:36,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:36,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 11:21:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 11:21:36,676 INFO L87 Difference]: Start difference. First operand 287 states and 708 transitions. Second operand 6 states. [2019-10-22 11:21:36,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:36,814 INFO L93 Difference]: Finished difference Result 545 states and 1322 transitions. [2019-10-22 11:21:36,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 11:21:36,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-22 11:21:36,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:36,817 INFO L225 Difference]: With dead ends: 545 [2019-10-22 11:21:36,818 INFO L226 Difference]: Without dead ends: 335 [2019-10-22 11:21:36,818 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-22 11:21:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2019-10-22 11:21:36,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2019-10-22 11:21:36,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2019-10-22 11:21:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2019-10-22 11:21:36,830 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 25 [2019-10-22 11:21:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:36,831 INFO L462 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2019-10-22 11:21:36,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 11:21:36,831 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2019-10-22 11:21:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 11:21:36,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:36,832 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:36,833 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:36,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:36,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1553903636, now seen corresponding path program 1 times [2019-10-22 11:21:36,833 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:36,833 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955561903] [2019-10-22 11:21:36,833 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:36,834 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:36,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:36,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955561903] [2019-10-22 11:21:36,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740439986] [2019-10-22 11:21:36,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/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 [2019-10-22 11:21:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:37,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:21:37,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:37,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:37,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:37,094 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:37,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:37,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:37,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:37,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:37,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [629124805] [2019-10-22 11:21:37,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:37,354 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:128) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.(CegarAbsIntRunner.java:158) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.getOrConstructRunner(IpTcStrategyModuleAbstractInterpretation.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAbstractInterpretation.construct(IpTcStrategyModuleAbstractInterpretation.java:81) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-22 11:21:37,358 INFO L168 Benchmark]: Toolchain (without parser) took 3068.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 939.1 MB in the beginning and 913.9 MB in the end (delta: 25.1 MB). Peak memory consumption was 187.1 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:37,359 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:37,359 INFO L168 Benchmark]: CACSL2BoogieTranslator took 475.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:37,360 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:37,360 INFO L168 Benchmark]: Boogie Preprocessor took 39.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:37,361 INFO L168 Benchmark]: RCFGBuilder took 392.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:37,361 INFO L168 Benchmark]: TraceAbstraction took 2111.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 913.9 MB in the end (delta: 180.3 MB). Peak memory consumption was 180.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:37,364 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 475.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 162.0 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 8.7 MB). Peak memory consumption was 8.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 39.93 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 392.97 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2111.67 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 913.9 MB in the end (delta: 180.3 MB). Peak memory consumption was 180.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:39,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:39,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:39,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:39,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:39,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:39,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:39,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:39,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:39,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:39,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:39,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:39,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:39,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:39,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:39,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:39,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:39,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:39,488 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:39,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:39,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:39,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:39,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:39,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:39,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:39,496 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:39,496 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:39,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:39,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:39,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:39,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:39,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:39,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:39,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:39,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:39,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:39,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:39,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:39,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:39,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:39,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:39,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2019-10-22 11:21:39,515 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:39,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:39,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:39,516 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:39,516 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:39,516 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:39,516 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:39,516 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:39,517 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:39,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:39,517 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 11:21:39,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 11:21:39,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:39,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:39,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:39,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:39,518 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-10-22 11:21:39,518 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-10-22 11:21:39,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 11:21:39,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:39,519 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 11:21:39,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:39,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:39,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:39,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:39,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:39,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:39,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:39,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:39,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:39,521 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-10-22 11:21:39,521 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-10-22 11:21:39,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:39,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:39,521 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan 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 -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e24917ef8695200a643e71e238ee3c2cc9fb2120 [2019-10-22 11:21:39,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:39,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:39,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:39,574 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:39,575 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:39,575 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2019-10-22 11:21:39,626 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data/617c70973/1069678a77dd48fba06895f4c2a18dad/FLAGf1008b85f [2019-10-22 11:21:40,056 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:40,059 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/sv-benchmarks/c/pthread/triangular-longer-1.i [2019-10-22 11:21:40,072 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data/617c70973/1069678a77dd48fba06895f4c2a18dad/FLAGf1008b85f [2019-10-22 11:21:40,386 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/data/617c70973/1069678a77dd48fba06895f4c2a18dad [2019-10-22 11:21:40,388 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:40,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:40,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:40,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:40,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:40,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:40,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5610841b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40, skipping insertion in model container [2019-10-22 11:21:40,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:40,403 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:40,436 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:40,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:40,870 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:40,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:40,991 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:40,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40 WrapperNode [2019-10-22 11:21:40,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:40,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:40,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:40,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:41,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,015 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:41,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:41,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:41,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:41,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... [2019-10-22 11:21:41,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:41,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:41,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:41,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:41,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/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 [2019-10-22 11:21:41,106 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-10-22 11:21:41,106 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-10-22 11:21:41,106 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-10-22 11:21:41,107 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-10-22 11:21:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-10-22 11:21:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:21:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 11:21:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-10-22 11:21:41,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-10-22 11:21:41,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:41,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:41,109 WARN L202 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-10-22 11:21:41,366 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:41,367 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-22 11:21:41,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:41 BoogieIcfgContainer [2019-10-22 11:21:41,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:41,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:41,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:41,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:41,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:40" (1/3) ... [2019-10-22 11:21:41,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3a1c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:41, skipping insertion in model container [2019-10-22 11:21:41,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:40" (2/3) ... [2019-10-22 11:21:41,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3a1c9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:41, skipping insertion in model container [2019-10-22 11:21:41,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:41" (3/3) ... [2019-10-22 11:21:41,375 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-10-22 11:21:41,405 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,405 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,406 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,406 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,406 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,406 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,407 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,407 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,407 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,407 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,408 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,408 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,408 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,408 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,409 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,409 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,409 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,409 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,409 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,410 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,410 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,410 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,410 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,411 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,411 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,412 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,412 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,412 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 11:21:41,421 WARN L141 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-10-22 11:21:41,421 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:41,443 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 11:21:41,453 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 11:21:41,476 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:41,477 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:41,477 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:41,477 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:41,477 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:41,477 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:41,477 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:41,477 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:41,486 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 48 transitions [2019-10-22 11:21:41,594 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2019-10-22 11:21:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2019-10-22 11:21:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 11:21:41,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:41,609 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:41,611 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1918718107, now seen corresponding path program 1 times [2019-10-22 11:21:41,630 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:41,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1753241780] [2019-10-22 11:21:41,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:41,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 11:21:41,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:41,847 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:41,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:41,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:41,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753241780] [2019-10-22 11:21:41,937 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:41,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-10-22 11:21:41,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130923311] [2019-10-22 11:21:41,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 11:21:41,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 11:21:41,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-22 11:21:41,962 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 7 states. [2019-10-22 11:21:42,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:42,251 INFO L93 Difference]: Finished difference Result 2729 states and 7869 transitions. [2019-10-22 11:21:42,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 11:21:42,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-22 11:21:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:42,279 INFO L225 Difference]: With dead ends: 2729 [2019-10-22 11:21:42,280 INFO L226 Difference]: Without dead ends: 584 [2019-10-22 11:21:42,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2019-10-22 11:21:42,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-22 11:21:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 385. [2019-10-22 11:21:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2019-10-22 11:21:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 947 transitions. [2019-10-22 11:21:42,361 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 947 transitions. Word has length 19 [2019-10-22 11:21:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:42,362 INFO L462 AbstractCegarLoop]: Abstraction has 385 states and 947 transitions. [2019-10-22 11:21:42,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 11:21:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 947 transitions. [2019-10-22 11:21:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 11:21:42,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:42,364 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:42,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:42,565 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1011235803, now seen corresponding path program 1 times [2019-10-22 11:21:42,566 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:42,566 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [909995053] [2019-10-22 11:21:42,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:42,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:21:42,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:42,706 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:42,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:42,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:42,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:42,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [909995053] [2019-10-22 11:21:42,797 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:42,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-10-22 11:21:42,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568334142] [2019-10-22 11:21:42,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:21:42,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:42,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:21:42,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:21:42,803 INFO L87 Difference]: Start difference. First operand 385 states and 947 transitions. Second operand 9 states. [2019-10-22 11:21:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:43,157 INFO L93 Difference]: Finished difference Result 703 states and 1701 transitions. [2019-10-22 11:21:43,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 11:21:43,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-10-22 11:21:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:43,162 INFO L225 Difference]: With dead ends: 703 [2019-10-22 11:21:43,163 INFO L226 Difference]: Without dead ends: 376 [2019-10-22 11:21:43,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:21:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2019-10-22 11:21:43,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 334. [2019-10-22 11:21:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2019-10-22 11:21:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 802 transitions. [2019-10-22 11:21:43,186 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 802 transitions. Word has length 25 [2019-10-22 11:21:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:43,186 INFO L462 AbstractCegarLoop]: Abstraction has 334 states and 802 transitions. [2019-10-22 11:21:43,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:21:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 802 transitions. [2019-10-22 11:21:43,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 11:21:43,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:43,188 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:43,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:43,389 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:43,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:43,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1020173103, now seen corresponding path program 2 times [2019-10-22 11:21:43,390 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:43,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [522747639] [2019-10-22 11:21:43,391 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:43,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-22 11:21:43,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:43,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 11:21:43,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:43,556 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:43,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:43,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:43,639 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [522747639] [2019-10-22 11:21:43,639 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:43,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-10-22 11:21:43,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856930805] [2019-10-22 11:21:43,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 11:21:43,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 11:21:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-22 11:21:43,641 INFO L87 Difference]: Start difference. First operand 334 states and 802 transitions. Second operand 9 states. [2019-10-22 11:21:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:43,966 INFO L93 Difference]: Finished difference Result 684 states and 1649 transitions. [2019-10-22 11:21:43,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 11:21:43,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-10-22 11:21:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:43,969 INFO L225 Difference]: With dead ends: 684 [2019-10-22 11:21:43,969 INFO L226 Difference]: Without dead ends: 383 [2019-10-22 11:21:43,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2019-10-22 11:21:43,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2019-10-22 11:21:43,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2019-10-22 11:21:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2019-10-22 11:21:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2019-10-22 11:21:43,994 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 25 [2019-10-22 11:21:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:43,994 INFO L462 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2019-10-22 11:21:43,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 11:21:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2019-10-22 11:21:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 11:21:43,998 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:43,998 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:44,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:44,199 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:44,200 INFO L82 PathProgramCache]: Analyzing trace with hash 762173390, now seen corresponding path program 1 times [2019-10-22 11:21:44,200 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:44,200 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1183002988] [2019-10-22 11:21:44,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:44,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:21:44,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:44,392 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:44,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:44,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:44,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183002988] [2019-10-22 11:21:44,602 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406975628] [2019-10-22 11:21:44,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/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 [2019-10-22 11:21:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:44,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 11:21:44,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:44,688 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:44,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:44,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:44,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:44,702 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:44,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9] total 15 [2019-10-22 11:21:44,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784845598] [2019-10-22 11:21:44,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 11:21:44,703 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 11:21:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-10-22 11:21:44,704 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 15 states. [2019-10-22 11:21:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:46,057 INFO L93 Difference]: Finished difference Result 1064 states and 2556 transitions. [2019-10-22 11:21:46,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 11:21:46,058 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2019-10-22 11:21:46,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:46,061 INFO L225 Difference]: With dead ends: 1064 [2019-10-22 11:21:46,061 INFO L226 Difference]: Without dead ends: 499 [2019-10-22 11:21:46,061 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=682, Unknown=0, NotChecked=0, Total=930 [2019-10-22 11:21:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-10-22 11:21:46,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 415. [2019-10-22 11:21:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2019-10-22 11:21:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2019-10-22 11:21:46,073 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2019-10-22 11:21:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:46,074 INFO L462 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2019-10-22 11:21:46,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 11:21:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2019-10-22 11:21:46,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-22 11:21:46,076 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:46,076 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:46,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:46,477 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1932769265, now seen corresponding path program 2 times [2019-10-22 11:21:46,477 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:46,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [132150413] [2019-10-22 11:21:46,477 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:46,637 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:46,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:46,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 11:21:46,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:21:46,755 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:46,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:46,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:46,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:21:47,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [132150413] [2019-10-22 11:21:47,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090460328] [2019-10-22 11:21:47,158 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/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 [2019-10-22 11:21:47,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 11:21:47,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:47,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 11:21:47,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:21:47,235 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:47,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:47,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:21:47,283 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:47,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 19 [2019-10-22 11:21:47,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668739713] [2019-10-22 11:21:47,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 11:21:47,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:47,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 11:21:47,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2019-10-22 11:21:47,285 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 19 states. [2019-10-22 11:21:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:49,452 INFO L93 Difference]: Finished difference Result 1512 states and 3550 transitions. [2019-10-22 11:21:49,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-22 11:21:49,453 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2019-10-22 11:21:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:49,456 INFO L225 Difference]: With dead ends: 1512 [2019-10-22 11:21:49,457 INFO L226 Difference]: Without dead ends: 783 [2019-10-22 11:21:49,457 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=446, Invalid=1360, Unknown=0, NotChecked=0, Total=1806 [2019-10-22 11:21:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-10-22 11:21:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 639. [2019-10-22 11:21:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2019-10-22 11:21:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1412 transitions. [2019-10-22 11:21:49,491 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1412 transitions. Word has length 49 [2019-10-22 11:21:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:49,491 INFO L462 AbstractCegarLoop]: Abstraction has 639 states and 1412 transitions. [2019-10-22 11:21:49,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 11:21:49,491 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1412 transitions. [2019-10-22 11:21:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-22 11:21:49,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:49,493 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:49,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:49,896 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash 259408878, now seen corresponding path program 3 times [2019-10-22 11:21:49,897 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:49,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1824236299] [2019-10-22 11:21:49,897 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:50,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 11:21:50,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:50,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 11:21:50,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:21:50,267 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:50,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:50,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:21:50,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1824236299] [2019-10-22 11:21:50,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223493] [2019-10-22 11:21:50,976 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/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 [2019-10-22 11:21:51,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 11:21:51,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:51,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 11:21:51,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:21:51,051 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:51,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:51,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-22 11:21:51,096 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:51,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 25 [2019-10-22 11:21:51,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452718891] [2019-10-22 11:21:51,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 11:21:51,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:51,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 11:21:51,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2019-10-22 11:21:51,098 INFO L87 Difference]: Start difference. First operand 639 states and 1412 transitions. Second operand 25 states. [2019-10-22 11:21:51,800 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2019-10-22 11:21:53,110 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2019-10-22 11:21:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:54,812 INFO L93 Difference]: Finished difference Result 1982 states and 4637 transitions. [2019-10-22 11:21:54,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-22 11:21:54,812 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 61 [2019-10-22 11:21:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:54,816 INFO L225 Difference]: With dead ends: 1982 [2019-10-22 11:21:54,816 INFO L226 Difference]: Without dead ends: 995 [2019-10-22 11:21:54,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=730, Invalid=2350, Unknown=0, NotChecked=0, Total=3080 [2019-10-22 11:21:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2019-10-22 11:21:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 575. [2019-10-22 11:21:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2019-10-22 11:21:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2019-10-22 11:21:54,837 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 61 [2019-10-22 11:21:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:54,838 INFO L462 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2019-10-22 11:21:54,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 11:21:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2019-10-22 11:21:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-22 11:21:54,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:54,840 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:21:55,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:21:55,241 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:21:55,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:55,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1308011473, now seen corresponding path program 4 times [2019-10-22 11:21:55,242 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:21:55,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [806708915] [2019-10-22 11:21:55,243 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:21:55,512 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:21:55,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:55,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:21:55,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:55,857 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:55,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:55,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:57,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806708915] [2019-10-22 11:21:57,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970140402] [2019-10-22 11:21:57,318 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/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 [2019-10-22 11:21:57,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 11:21:57,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:21:57,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:21:57,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:21:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:57,413 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:21:57,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:57,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 11:21:57,450 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:57,450 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:21:57,450 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22] total 41 [2019-10-22 11:21:57,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642259934] [2019-10-22 11:21:57,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-22 11:21:57,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:21:57,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-22 11:21:57,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2019-10-22 11:21:57,452 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 41 states. [2019-10-22 11:21:58,667 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2019-10-22 11:21:59,246 WARN L191 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2019-10-22 11:21:59,757 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2019-10-22 11:22:00,278 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2019-10-22 11:22:00,763 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2019-10-22 11:22:01,323 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2019-10-22 11:22:01,798 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2019-10-22 11:22:02,272 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2019-10-22 11:22:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:05,544 INFO L93 Difference]: Finished difference Result 1190 states and 2661 transitions. [2019-10-22 11:22:05,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-22 11:22:05,544 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 89 [2019-10-22 11:22:05,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:05,547 INFO L225 Difference]: With dead ends: 1190 [2019-10-22 11:22:05,547 INFO L226 Difference]: Without dead ends: 895 [2019-10-22 11:22:05,548 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1105, Invalid=5215, Unknown=0, NotChecked=0, Total=6320 [2019-10-22 11:22:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2019-10-22 11:22:05,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2019-10-22 11:22:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2019-10-22 11:22:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2019-10-22 11:22:05,567 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 89 [2019-10-22 11:22:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:05,568 INFO L462 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2019-10-22 11:22:05,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-22 11:22:05,568 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2019-10-22 11:22:05,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-22 11:22:05,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:05,571 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:05,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:05,972 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash -237193522, now seen corresponding path program 5 times [2019-10-22 11:22:05,973 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:05,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [995493604] [2019-10-22 11:22:05,973 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:06,236 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-22 11:22:06,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:06,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:22:06,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:06,567 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:07,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [995493604] [2019-10-22 11:22:07,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50917132] [2019-10-22 11:22:07,994 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:08,082 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-22 11:22:08,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:08,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:22:08,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:08,106 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:08,125 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:08,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23] total 44 [2019-10-22 11:22:08,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893004308] [2019-10-22 11:22:08,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-22 11:22:08,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-22 11:22:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2019-10-22 11:22:08,127 INFO L87 Difference]: Start difference. First operand 895 states and 1924 transitions. Second operand 44 states. [2019-10-22 11:22:09,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:09,352 INFO L93 Difference]: Finished difference Result 3739 states and 7426 transitions. [2019-10-22 11:22:09,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-22 11:22:09,353 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 101 [2019-10-22 11:22:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:09,354 INFO L225 Difference]: With dead ends: 3739 [2019-10-22 11:22:09,355 INFO L226 Difference]: Without dead ends: 567 [2019-10-22 11:22:09,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=516, Invalid=3516, Unknown=0, NotChecked=0, Total=4032 [2019-10-22 11:22:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2019-10-22 11:22:09,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2019-10-22 11:22:09,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567 states. [2019-10-22 11:22:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1197 transitions. [2019-10-22 11:22:09,366 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1197 transitions. Word has length 101 [2019-10-22 11:22:09,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:09,366 INFO L462 AbstractCegarLoop]: Abstraction has 567 states and 1197 transitions. [2019-10-22 11:22:09,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-22 11:22:09,366 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1197 transitions. [2019-10-22 11:22:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-22 11:22:09,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:22:09,367 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 11:22:09,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:09,768 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 11:22:09,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:22:09,768 INFO L82 PathProgramCache]: Analyzing trace with hash 844283892, now seen corresponding path program 6 times [2019-10-22 11:22:09,769 INFO L157 tionRefinementEngine]: Executing refinement strategy WALRUS [2019-10-22 11:22:09,769 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [278355620] [2019-10-22 11:22:09,769 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:09,994 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-22 11:22:09,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:09,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:22:09,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:10,254 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:11,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [278355620] [2019-10-22 11:22:11,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286544820] [2019-10-22 11:22:11,654 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 11:22:11,786 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-22 11:22:11,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 11:22:11,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 11:22:11,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 11:22:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:11,806 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-22 11:22:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:22:11,838 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-22 11:22:11,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23] total 44 [2019-10-22 11:22:11,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964235995] [2019-10-22 11:22:11,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-22 11:22:11,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-10-22 11:22:11,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-22 11:22:11,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2019-10-22 11:22:11,840 INFO L87 Difference]: Start difference. First operand 567 states and 1197 transitions. Second operand 44 states. [2019-10-22 11:22:12,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:22:12,685 INFO L93 Difference]: Finished difference Result 1883 states and 3445 transitions. [2019-10-22 11:22:12,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-22 11:22:12,685 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 101 [2019-10-22 11:22:12,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:22:12,685 INFO L225 Difference]: With dead ends: 1883 [2019-10-22 11:22:12,686 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 11:22:12,686 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=516, Invalid=3516, Unknown=0, NotChecked=0, Total=4032 [2019-10-22 11:22:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 11:22:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 11:22:12,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 11:22:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 11:22:12,687 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2019-10-22 11:22:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:22:12,687 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 11:22:12,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-22 11:22:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 11:22:12,687 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 11:22:13,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-10-22 11:22:13,091 INFO L303 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-10-22 11:22:13,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:22:13 BasicIcfg [2019-10-22 11:22:13,092 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:22:13,092 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:22:13,093 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:22:13,093 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:22:13,093 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:41" (3/4) ... [2019-10-22 11:22:13,096 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 11:22:13,101 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-10-22 11:22:13,101 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-10-22 11:22:13,104 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-10-22 11:22:13,105 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-10-22 11:22:13,106 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-10-22 11:22:13,138 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6ce10c28-ce7f-448a-9b7b-c60ea9ca16d0/bin/utaipan/witness.graphml [2019-10-22 11:22:13,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:22:13,140 INFO L168 Benchmark]: Toolchain (without parser) took 32750.48 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 416.8 MB). Free memory was 940.3 MB in the beginning and 1.2 GB in the end (delta: -302.4 MB). Peak memory consumption was 114.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:13,140 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:13,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 601.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -192.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:13,140 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:13,141 INFO L168 Benchmark]: Boogie Preprocessor took 28.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:22:13,141 INFO L168 Benchmark]: RCFGBuilder took 307.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:13,141 INFO L168 Benchmark]: TraceAbstraction took 31723.51 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 253.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -141.5 MB). Peak memory consumption was 111.7 MB. Max. memory is 11.5 GB. [2019-10-22 11:22:13,142 INFO L168 Benchmark]: Witness Printer took 46.12 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 668.6 kB). Peak memory consumption was 668.6 kB. Max. memory is 11.5 GB. [2019-10-22 11:22:13,144 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 972.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 601.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 163.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -192.0 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 307.02 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 31723.51 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 253.2 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -141.5 MB). Peak memory consumption was 111.7 MB. Max. memory is 11.5 GB. * Witness Printer took 46.12 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 668.6 kB). Peak memory consumption was 668.6 kB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 5 procedures, 64 locations, 1 error locations. Result: SAFE, OverallTime: 31.6s, OverallIterations: 9, TraceHistogramMax: 11, AutomataDifference: 18.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1030 SDtfs, 6553 SDslu, 15817 SDs, 0 SdLazy, 3298 SolverSat, 715 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2049 GetRequests, 1683 SyntacticMatches, 2 SemanticMatches, 364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2771 ImplicationChecksByTransitivity, 21.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 889 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 945 NumberOfCodeBlocks, 945 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1860 ConstructedInterpolants, 0 QuantifiedInterpolants, 855514 SizeOfPredicates, 202 NumberOfNonLiveVariables, 1460 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 30 InterpolantComputations, 6 PerfectInterpolantSequences, 32/4160 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...