./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash faab412b2ab361cad3ea824ae769b15468801bfa ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-19 23:28:54,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:28:54,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:28:54,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:28:54,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:28:54,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:28:54,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:28:54,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:28:54,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:28:54,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:28:54,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:28:54,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:28:54,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:28:54,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:28:54,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:28:54,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:28:54,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:28:54,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:28:54,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:28:54,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:28:54,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:28:54,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:28:54,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:28:54,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:28:54,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:28:54,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:28:54,131 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:28:54,132 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:28:54,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:28:54,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:28:54,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:28:54,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:28:54,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:28:54,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:28:54,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:28:54,137 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:28:54,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:28:54,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:28:54,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:28:54,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:28:54,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:28:54,140 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-19 23:28:54,163 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:28:54,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:28:54,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:28:54,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:28:54,164 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:28:54,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:28:54,165 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:28:54,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:28:54,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:28:54,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:28:54,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-19 23:28:54,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:28:54,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-19 23:28:54,166 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:28:54,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-19 23:28:54,166 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:28:54,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-19 23:28:54,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:28:54,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:28:54,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:28:54,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:28:54,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:28:54,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:28:54,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:28:54,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-19 23:28:54,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-19 23:28:54,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-19 23:28:54,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-19 23:28:54,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faab412b2ab361cad3ea824ae769b15468801bfa [2019-11-19 23:28:54,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:28:54,361 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:28:54,363 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:28:54,365 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:28:54,365 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:28:54,366 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longest-2.i [2019-11-19 23:28:54,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/data/59e914799/41c6d98dbfdc412a85e0a5670fb61048/FLAGbb16cc528 [2019-11-19 23:28:54,809 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:28:54,809 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/sv-benchmarks/c/pthread/triangular-longest-2.i [2019-11-19 23:28:54,821 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/data/59e914799/41c6d98dbfdc412a85e0a5670fb61048/FLAGbb16cc528 [2019-11-19 23:28:55,151 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/data/59e914799/41c6d98dbfdc412a85e0a5670fb61048 [2019-11-19 23:28:55,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:28:55,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-19 23:28:55,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:28:55,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:28:55,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:28:55,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42ae4949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55, skipping insertion in model container [2019-11-19 23:28:55,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,172 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:28:55,216 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:28:55,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:28:55,619 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:28:55,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:28:55,728 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:28:55,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55 WrapperNode [2019-11-19 23:28:55,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:28:55,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-19 23:28:55,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-19 23:28:55,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-19 23:28:55,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,752 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-19 23:28:55,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:28:55,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:28:55,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:28:55,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,786 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... [2019-11-19 23:28:55,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:28:55,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:28:55,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:28:55,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:28:55,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:28:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-19 23:28:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-19 23:28:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-19 23:28:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-19 23:28:55,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-19 23:28:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-19 23:28:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 23:28:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:28:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-19 23:28:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:28:55,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:28:55,881 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-19 23:28:56,212 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:28:56,213 INFO L285 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-19 23:28:56,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:28:56 BoogieIcfgContainer [2019-11-19 23:28:56,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:28:56,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:28:56,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:28:56,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:28:56,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:28:55" (1/3) ... [2019-11-19 23:28:56,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d49804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:28:56, skipping insertion in model container [2019-11-19 23:28:56,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:28:55" (2/3) ... [2019-11-19 23:28:56,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d49804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:28:56, skipping insertion in model container [2019-11-19 23:28:56,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:28:56" (3/3) ... [2019-11-19 23:28:56,220 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2019-11-19 23:28:56,263 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,263 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,264 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,264 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,264 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,264 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,265 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,265 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,265 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,265 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,266 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,266 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,266 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,266 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,267 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,267 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,267 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,267 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,267 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,268 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,268 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,268 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,268 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,269 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,269 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,269 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,269 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,269 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,270 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,270 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,270 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,270 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,271 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,271 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,271 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,271 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,271 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,272 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,272 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,272 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,272 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,273 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,273 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,273 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,273 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,273 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,274 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,274 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,274 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,274 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,275 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,275 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,275 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,275 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,275 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,276 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,276 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,276 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,276 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,276 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,277 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,277 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,277 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,277 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,278 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,278 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,278 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,278 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,279 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,279 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,279 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,279 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,280 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,280 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,280 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,280 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,280 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,281 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,281 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,281 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,281 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,282 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,282 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,282 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-19 23:28:56,309 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-19 23:28:56,309 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:28:56,315 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-19 23:28:56,325 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-19 23:28:56,345 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:28:56,345 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-19 23:28:56,345 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:28:56,346 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:28:56,346 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:28:56,346 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:28:56,346 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:28:56,346 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:28:56,355 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 95 places, 93 transitions [2019-11-19 23:28:57,166 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 8843 states. [2019-11-19 23:28:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states. [2019-11-19 23:28:57,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-19 23:28:57,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:57,195 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:28:57,195 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:28:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1140660711, now seen corresponding path program 1 times [2019-11-19 23:28:57,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:28:57,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318398174] [2019-11-19 23:28:57,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:28:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:57,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318398174] [2019-11-19 23:28:57,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:28:57,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 23:28:57,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307085936] [2019-11-19 23:28:57,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:28:57,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:28:57,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:28:57,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:28:57,581 INFO L87 Difference]: Start difference. First operand 8843 states. Second operand 5 states. [2019-11-19 23:28:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:28:57,999 INFO L93 Difference]: Finished difference Result 15656 states and 45634 transitions. [2019-11-19 23:28:58,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:28:58,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-19 23:28:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:28:58,078 INFO L225 Difference]: With dead ends: 15656 [2019-11-19 23:28:58,079 INFO L226 Difference]: Without dead ends: 4154 [2019-11-19 23:28:58,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:28:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2019-11-19 23:28:58,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3146. [2019-11-19 23:28:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3146 states. [2019-11-19 23:28:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 8437 transitions. [2019-11-19 23:28:58,329 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 8437 transitions. Word has length 20 [2019-11-19 23:28:58,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:28:58,331 INFO L462 AbstractCegarLoop]: Abstraction has 3146 states and 8437 transitions. [2019-11-19 23:28:58,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:28:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 8437 transitions. [2019-11-19 23:28:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-19 23:28:58,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:58,335 INFO L410 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] [2019-11-19 23:28:58,335 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:28:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:58,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1489054159, now seen corresponding path program 1 times [2019-11-19 23:28:58,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:28:58,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500201054] [2019-11-19 23:28:58,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:28:58,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:58,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500201054] [2019-11-19 23:28:58,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:28:58,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 23:28:58,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259044934] [2019-11-19 23:28:58,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:28:58,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:28:58,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:28:58,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:28:58,518 INFO L87 Difference]: Start difference. First operand 3146 states and 8437 transitions. Second operand 5 states. [2019-11-19 23:28:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:28:58,735 INFO L93 Difference]: Finished difference Result 4721 states and 12028 transitions. [2019-11-19 23:28:58,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 23:28:58,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-19 23:28:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:28:58,758 INFO L225 Difference]: With dead ends: 4721 [2019-11-19 23:28:58,758 INFO L226 Difference]: Without dead ends: 2894 [2019-11-19 23:28:58,759 INFO L630 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 [2019-11-19 23:28:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2019-11-19 23:28:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2894. [2019-11-19 23:28:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2894 states. [2019-11-19 23:28:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 7537 transitions. [2019-11-19 23:28:58,860 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 7537 transitions. Word has length 23 [2019-11-19 23:28:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:28:58,860 INFO L462 AbstractCegarLoop]: Abstraction has 2894 states and 7537 transitions. [2019-11-19 23:28:58,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:28:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 7537 transitions. [2019-11-19 23:28:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-19 23:28:58,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:58,862 INFO L410 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] [2019-11-19 23:28:58,862 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:28:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1209200713, now seen corresponding path program 1 times [2019-11-19 23:28:58,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:28:58,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462550621] [2019-11-19 23:28:58,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:28:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:58,977 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462550621] [2019-11-19 23:28:58,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:28:58,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-19 23:28:58,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753599850] [2019-11-19 23:28:58,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:28:58,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:28:58,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:28:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:28:58,979 INFO L87 Difference]: Start difference. First operand 2894 states and 7537 transitions. Second operand 5 states. [2019-11-19 23:28:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:28:59,083 INFO L93 Difference]: Finished difference Result 3587 states and 8923 transitions. [2019-11-19 23:28:59,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:28:59,084 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-19 23:28:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:28:59,104 INFO L225 Difference]: With dead ends: 3587 [2019-11-19 23:28:59,104 INFO L226 Difference]: Without dead ends: 2471 [2019-11-19 23:28:59,105 INFO L630 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 [2019-11-19 23:28:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-11-19 23:28:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2372. [2019-11-19 23:28:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2372 states. [2019-11-19 23:28:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 6091 transitions. [2019-11-19 23:28:59,192 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 6091 transitions. Word has length 23 [2019-11-19 23:28:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:28:59,193 INFO L462 AbstractCegarLoop]: Abstraction has 2372 states and 6091 transitions. [2019-11-19 23:28:59,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:28:59,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 6091 transitions. [2019-11-19 23:28:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-19 23:28:59,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:59,196 INFO L410 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, 1] [2019-11-19 23:28:59,196 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:28:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1178025167, now seen corresponding path program 1 times [2019-11-19 23:28:59,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:28:59,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876608317] [2019-11-19 23:28:59,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:28:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:59,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876608317] [2019-11-19 23:28:59,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:28:59,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-19 23:28:59,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108652312] [2019-11-19 23:28:59,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:28:59,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:28:59,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:28:59,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:28:59,335 INFO L87 Difference]: Start difference. First operand 2372 states and 6091 transitions. Second operand 6 states. [2019-11-19 23:28:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:28:59,524 INFO L93 Difference]: Finished difference Result 3794 states and 9382 transitions. [2019-11-19 23:28:59,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 23:28:59,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-19 23:28:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:28:59,542 INFO L225 Difference]: With dead ends: 3794 [2019-11-19 23:28:59,542 INFO L226 Difference]: Without dead ends: 2642 [2019-11-19 23:28:59,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:28:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2019-11-19 23:28:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2642. [2019-11-19 23:28:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2019-11-19 23:28:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 6637 transitions. [2019-11-19 23:28:59,708 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 6637 transitions. Word has length 26 [2019-11-19 23:28:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:28:59,708 INFO L462 AbstractCegarLoop]: Abstraction has 2642 states and 6637 transitions. [2019-11-19 23:28:59,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:28:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 6637 transitions. [2019-11-19 23:28:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-19 23:28:59,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:28:59,712 INFO L410 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, 1] [2019-11-19 23:28:59,712 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:28:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:28:59,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1189496420, now seen corresponding path program 1 times [2019-11-19 23:28:59,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:28:59,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637348251] [2019-11-19 23:28:59,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:28:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:59,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637348251] [2019-11-19 23:28:59,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389942350] [2019-11-19 23:28:59,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:28:59,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:28:59,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-19 23:28:59,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:28:59,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:28:59,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:28:59,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:28:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:28:59,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:28:59,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-19 23:28:59,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236256258] [2019-11-19 23:29:00,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:29:00,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:00,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:29:00,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:29:00,001 INFO L87 Difference]: Start difference. First operand 2642 states and 6637 transitions. Second operand 8 states. [2019-11-19 23:29:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:00,217 INFO L93 Difference]: Finished difference Result 3965 states and 9724 transitions. [2019-11-19 23:29:00,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 23:29:00,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-19 23:29:00,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:00,235 INFO L225 Difference]: With dead ends: 3965 [2019-11-19 23:29:00,235 INFO L226 Difference]: Without dead ends: 2786 [2019-11-19 23:29:00,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:29:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2019-11-19 23:29:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2471. [2019-11-19 23:29:00,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2471 states. [2019-11-19 23:29:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 6295 transitions. [2019-11-19 23:29:00,310 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 6295 transitions. Word has length 30 [2019-11-19 23:29:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:00,310 INFO L462 AbstractCegarLoop]: Abstraction has 2471 states and 6295 transitions. [2019-11-19 23:29:00,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:29:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 6295 transitions. [2019-11-19 23:29:00,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-19 23:29:00,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:00,313 INFO L410 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, 1] [2019-11-19 23:29:00,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:00,521 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:00,522 INFO L82 PathProgramCache]: Analyzing trace with hash -853557012, now seen corresponding path program 1 times [2019-11-19 23:29:00,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:00,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131973116] [2019-11-19 23:29:00,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:00,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131973116] [2019-11-19 23:29:00,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689333467] [2019-11-19 23:29:00,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:00,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-19 23:29:00,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:00,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:00,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:00,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:00,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-19 23:29:00,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333817336] [2019-11-19 23:29:00,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:29:00,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:29:00,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:29:00,732 INFO L87 Difference]: Start difference. First operand 2471 states and 6295 transitions. Second operand 8 states. [2019-11-19 23:29:00,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:00,935 INFO L93 Difference]: Finished difference Result 4991 states and 12217 transitions. [2019-11-19 23:29:00,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-19 23:29:00,936 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-19 23:29:00,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:00,957 INFO L225 Difference]: With dead ends: 4991 [2019-11-19 23:29:00,958 INFO L226 Difference]: Without dead ends: 3074 [2019-11-19 23:29:00,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:29:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2019-11-19 23:29:01,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2606. [2019-11-19 23:29:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2606 states. [2019-11-19 23:29:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 6559 transitions. [2019-11-19 23:29:01,039 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 6559 transitions. Word has length 30 [2019-11-19 23:29:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:01,039 INFO L462 AbstractCegarLoop]: Abstraction has 2606 states and 6559 transitions. [2019-11-19 23:29:01,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:29:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 6559 transitions. [2019-11-19 23:29:01,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-19 23:29:01,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:01,043 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-11-19 23:29:01,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:01,246 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash -852532087, now seen corresponding path program 1 times [2019-11-19 23:29:01,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:01,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708745545] [2019-11-19 23:29:01,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:01,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708745545] [2019-11-19 23:29:01,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418824329] [2019-11-19 23:29:01,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:01,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-19 23:29:01,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:01,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:01,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:01,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:01,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-19 23:29:01,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123160390] [2019-11-19 23:29:01,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 23:29:01,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:01,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 23:29:01,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:29:01,521 INFO L87 Difference]: Start difference. First operand 2606 states and 6559 transitions. Second operand 9 states. [2019-11-19 23:29:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:01,811 INFO L93 Difference]: Finished difference Result 5423 states and 13081 transitions. [2019-11-19 23:29:01,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 23:29:01,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-19 23:29:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:01,838 INFO L225 Difference]: With dead ends: 5423 [2019-11-19 23:29:01,838 INFO L226 Difference]: Without dead ends: 3722 [2019-11-19 23:29:01,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:29:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2019-11-19 23:29:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3470. [2019-11-19 23:29:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2019-11-19 23:29:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 8329 transitions. [2019-11-19 23:29:02,004 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 8329 transitions. Word has length 34 [2019-11-19 23:29:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:02,005 INFO L462 AbstractCegarLoop]: Abstraction has 3470 states and 8329 transitions. [2019-11-19 23:29:02,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 23:29:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 8329 transitions. [2019-11-19 23:29:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-19 23:29:02,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:02,012 INFO L410 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, 1] [2019-11-19 23:29:02,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:02,216 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:02,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:02,216 INFO L82 PathProgramCache]: Analyzing trace with hash 18119590, now seen corresponding path program 2 times [2019-11-19 23:29:02,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:02,216 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564424311] [2019-11-19 23:29:02,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:02,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564424311] [2019-11-19 23:29:02,348 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651662017] [2019-11-19 23:29:02,348 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:02,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:29:02,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:02,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-19 23:29:02,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:02,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:02,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:02,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:02,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:02,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-19 23:29:02,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271927438] [2019-11-19 23:29:02,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-19 23:29:02,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-19 23:29:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-19 23:29:02,473 INFO L87 Difference]: Start difference. First operand 3470 states and 8329 transitions. Second operand 10 states. [2019-11-19 23:29:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:02,822 INFO L93 Difference]: Finished difference Result 5783 states and 13801 transitions. [2019-11-19 23:29:02,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-19 23:29:02,823 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-11-19 23:29:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:02,831 INFO L225 Difference]: With dead ends: 5783 [2019-11-19 23:29:02,831 INFO L226 Difference]: Without dead ends: 3650 [2019-11-19 23:29:02,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2019-11-19 23:29:02,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3650 states. [2019-11-19 23:29:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3650 to 2894. [2019-11-19 23:29:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2894 states. [2019-11-19 23:29:02,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 7135 transitions. [2019-11-19 23:29:02,904 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 7135 transitions. Word has length 38 [2019-11-19 23:29:02,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:02,906 INFO L462 AbstractCegarLoop]: Abstraction has 2894 states and 7135 transitions. [2019-11-19 23:29:02,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-19 23:29:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 7135 transitions. [2019-11-19 23:29:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-19 23:29:02,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:02,911 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2019-11-19 23:29:03,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:03,114 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash 46740035, now seen corresponding path program 3 times [2019-11-19 23:29:03,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:03,115 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119456366] [2019-11-19 23:29:03,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:03,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119456366] [2019-11-19 23:29:03,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511637501] [2019-11-19 23:29:03,282 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:03,362 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-19 23:29:03,362 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:03,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 23:29:03,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:03,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:03,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:03,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:03,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:03,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-19 23:29:03,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581218359] [2019-11-19 23:29:03,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 23:29:03,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 23:29:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:29:03,402 INFO L87 Difference]: Start difference. First operand 2894 states and 7135 transitions. Second operand 11 states. [2019-11-19 23:29:03,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:03,771 INFO L93 Difference]: Finished difference Result 5855 states and 13945 transitions. [2019-11-19 23:29:03,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 23:29:03,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-11-19 23:29:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:03,786 INFO L225 Difference]: With dead ends: 5855 [2019-11-19 23:29:03,786 INFO L226 Difference]: Without dead ends: 3938 [2019-11-19 23:29:03,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-19 23:29:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2019-11-19 23:29:03,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3047. [2019-11-19 23:29:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3047 states. [2019-11-19 23:29:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 7447 transitions. [2019-11-19 23:29:03,862 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 7447 transitions. Word has length 42 [2019-11-19 23:29:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:03,862 INFO L462 AbstractCegarLoop]: Abstraction has 3047 states and 7447 transitions. [2019-11-19 23:29:03,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 23:29:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 7447 transitions. [2019-11-19 23:29:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-19 23:29:03,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:03,866 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1] [2019-11-19 23:29:04,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:04,070 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1936186464, now seen corresponding path program 4 times [2019-11-19 23:29:04,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:04,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261387177] [2019-11-19 23:29:04,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:04,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261387177] [2019-11-19 23:29:04,217 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444367020] [2019-11-19 23:29:04,217 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:04,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:29:04,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:04,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-19 23:29:04,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:04,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:04,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:04,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:04,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-19 23:29:04,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921802844] [2019-11-19 23:29:04,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-19 23:29:04,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:04,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-19 23:29:04,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-19 23:29:04,316 INFO L87 Difference]: Start difference. First operand 3047 states and 7447 transitions. Second operand 12 states. [2019-11-19 23:29:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:04,681 INFO L93 Difference]: Finished difference Result 6143 states and 14521 transitions. [2019-11-19 23:29:04,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-19 23:29:04,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-11-19 23:29:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:04,691 INFO L225 Difference]: With dead ends: 6143 [2019-11-19 23:29:04,691 INFO L226 Difference]: Without dead ends: 4226 [2019-11-19 23:29:04,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-19 23:29:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2019-11-19 23:29:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3182. [2019-11-19 23:29:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3182 states. [2019-11-19 23:29:04,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 7711 transitions. [2019-11-19 23:29:04,775 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 7711 transitions. Word has length 46 [2019-11-19 23:29:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:04,776 INFO L462 AbstractCegarLoop]: Abstraction has 3182 states and 7711 transitions. [2019-11-19 23:29:04,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-19 23:29:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 7711 transitions. [2019-11-19 23:29:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-19 23:29:04,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:04,781 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:04,984 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:04,985 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash 369010173, now seen corresponding path program 5 times [2019-11-19 23:29:04,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:04,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102971796] [2019-11-19 23:29:04,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:05,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102971796] [2019-11-19 23:29:05,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554062312] [2019-11-19 23:29:05,164 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:05,227 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-19 23:29:05,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:05,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-19 23:29:05,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:05,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:05,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:05,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:05,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-19 23:29:05,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484237256] [2019-11-19 23:29:05,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-19 23:29:05,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-19 23:29:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-19 23:29:05,265 INFO L87 Difference]: Start difference. First operand 3182 states and 7711 transitions. Second operand 13 states. [2019-11-19 23:29:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:05,616 INFO L93 Difference]: Finished difference Result 6431 states and 15097 transitions. [2019-11-19 23:29:05,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-19 23:29:05,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-11-19 23:29:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:05,626 INFO L225 Difference]: With dead ends: 6431 [2019-11-19 23:29:05,626 INFO L226 Difference]: Without dead ends: 4514 [2019-11-19 23:29:05,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-11-19 23:29:05,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2019-11-19 23:29:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 3335. [2019-11-19 23:29:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3335 states. [2019-11-19 23:29:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 8023 transitions. [2019-11-19 23:29:05,704 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 8023 transitions. Word has length 50 [2019-11-19 23:29:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:05,704 INFO L462 AbstractCegarLoop]: Abstraction has 3335 states and 8023 transitions. [2019-11-19 23:29:05,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-19 23:29:05,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 8023 transitions. [2019-11-19 23:29:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-19 23:29:05,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:05,709 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:05,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:05,916 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1175708442, now seen corresponding path program 6 times [2019-11-19 23:29:05,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:05,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754978085] [2019-11-19 23:29:05,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:06,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754978085] [2019-11-19 23:29:06,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738520260] [2019-11-19 23:29:06,066 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:06,124 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-19 23:29:06,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:06,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 23:29:06,127 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:06,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:06,149 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:06,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:06,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:06,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-19 23:29:06,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97777645] [2019-11-19 23:29:06,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-19 23:29:06,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:06,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-19 23:29:06,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-19 23:29:06,156 INFO L87 Difference]: Start difference. First operand 3335 states and 8023 transitions. Second operand 14 states. [2019-11-19 23:29:06,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:06,562 INFO L93 Difference]: Finished difference Result 6971 states and 16177 transitions. [2019-11-19 23:29:06,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-19 23:29:06,562 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-19 23:29:06,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:06,573 INFO L225 Difference]: With dead ends: 6971 [2019-11-19 23:29:06,573 INFO L226 Difference]: Without dead ends: 5270 [2019-11-19 23:29:06,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-11-19 23:29:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2019-11-19 23:29:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4910. [2019-11-19 23:29:06,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4910 states. [2019-11-19 23:29:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 11209 transitions. [2019-11-19 23:29:06,669 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 11209 transitions. Word has length 54 [2019-11-19 23:29:06,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:06,670 INFO L462 AbstractCegarLoop]: Abstraction has 4910 states and 11209 transitions. [2019-11-19 23:29:06,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-19 23:29:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 11209 transitions. [2019-11-19 23:29:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-19 23:29:06,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:06,678 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1] [2019-11-19 23:29:06,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:06,884 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:06,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:06,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1681277001, now seen corresponding path program 7 times [2019-11-19 23:29:06,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:06,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616650634] [2019-11-19 23:29:06,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:07,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616650634] [2019-11-19 23:29:07,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339934234] [2019-11-19 23:29:07,189 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:07,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-19 23:29:07,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:07,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:07,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:07,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:07,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-19 23:29:07,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289652885] [2019-11-19 23:29:07,311 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 23:29:07,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:07,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 23:29:07,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:29:07,313 INFO L87 Difference]: Start difference. First operand 4910 states and 11209 transitions. Second operand 15 states. [2019-11-19 23:29:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:07,739 INFO L93 Difference]: Finished difference Result 7223 states and 16681 transitions. [2019-11-19 23:29:07,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-19 23:29:07,740 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-11-19 23:29:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:07,746 INFO L225 Difference]: With dead ends: 7223 [2019-11-19 23:29:07,746 INFO L226 Difference]: Without dead ends: 5306 [2019-11-19 23:29:07,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2019-11-19 23:29:07,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2019-11-19 23:29:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 5198. [2019-11-19 23:29:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5198 states. [2019-11-19 23:29:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 11785 transitions. [2019-11-19 23:29:07,829 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 11785 transitions. Word has length 58 [2019-11-19 23:29:07,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:07,829 INFO L462 AbstractCegarLoop]: Abstraction has 5198 states and 11785 transitions. [2019-11-19 23:29:07,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-19 23:29:07,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 11785 transitions. [2019-11-19 23:29:07,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-19 23:29:07,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:07,837 INFO L410 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, 1] [2019-11-19 23:29:08,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:08,044 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:08,044 INFO L82 PathProgramCache]: Analyzing trace with hash 17993684, now seen corresponding path program 8 times [2019-11-19 23:29:08,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:08,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133830451] [2019-11-19 23:29:08,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:08,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133830451] [2019-11-19 23:29:08,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148214232] [2019-11-19 23:29:08,265 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:08,334 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:29:08,334 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:08,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 23:29:08,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:08,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:08,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:08,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:08,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:08,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-19 23:29:08,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130731224] [2019-11-19 23:29:08,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 23:29:08,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 23:29:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-19 23:29:08,378 INFO L87 Difference]: Start difference. First operand 5198 states and 11785 transitions. Second operand 16 states. [2019-11-19 23:29:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:08,886 INFO L93 Difference]: Finished difference Result 8645 states and 19966 transitions. [2019-11-19 23:29:08,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-19 23:29:08,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-11-19 23:29:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:08,894 INFO L225 Difference]: With dead ends: 8645 [2019-11-19 23:29:08,894 INFO L226 Difference]: Without dead ends: 5990 [2019-11-19 23:29:08,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2019-11-19 23:29:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2019-11-19 23:29:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5486. [2019-11-19 23:29:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2019-11-19 23:29:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 12361 transitions. [2019-11-19 23:29:08,984 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 12361 transitions. Word has length 62 [2019-11-19 23:29:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:08,984 INFO L462 AbstractCegarLoop]: Abstraction has 5486 states and 12361 transitions. [2019-11-19 23:29:08,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 23:29:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 12361 transitions. [2019-11-19 23:29:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-19 23:29:08,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:08,991 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:09,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:09,196 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1893433487, now seen corresponding path program 9 times [2019-11-19 23:29:09,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:09,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283012365] [2019-11-19 23:29:09,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:09,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283012365] [2019-11-19 23:29:09,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640498531] [2019-11-19 23:29:09,403 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:09,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-19 23:29:09,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:09,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-19 23:29:09,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:09,594 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:09,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:09,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:09,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-19 23:29:09,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537985844] [2019-11-19 23:29:09,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-19 23:29:09,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:09,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-19 23:29:09,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-19 23:29:09,602 INFO L87 Difference]: Start difference. First operand 5486 states and 12361 transitions. Second operand 17 states. [2019-11-19 23:29:10,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:10,043 INFO L93 Difference]: Finished difference Result 7799 states and 17833 transitions. [2019-11-19 23:29:10,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-19 23:29:10,043 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2019-11-19 23:29:10,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:10,048 INFO L225 Difference]: With dead ends: 7799 [2019-11-19 23:29:10,048 INFO L226 Difference]: Without dead ends: 5882 [2019-11-19 23:29:10,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-19 23:29:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2019-11-19 23:29:10,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 5774. [2019-11-19 23:29:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5774 states. [2019-11-19 23:29:10,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5774 states to 5774 states and 12937 transitions. [2019-11-19 23:29:10,138 INFO L78 Accepts]: Start accepts. Automaton has 5774 states and 12937 transitions. Word has length 66 [2019-11-19 23:29:10,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:10,138 INFO L462 AbstractCegarLoop]: Abstraction has 5774 states and 12937 transitions. [2019-11-19 23:29:10,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-19 23:29:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5774 states and 12937 transitions. [2019-11-19 23:29:10,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-19 23:29:10,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:10,148 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:10,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:10,356 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1839340914, now seen corresponding path program 10 times [2019-11-19 23:29:10,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:10,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212359517] [2019-11-19 23:29:10,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:10,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212359517] [2019-11-19 23:29:10,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402321050] [2019-11-19 23:29:10,598 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:10,680 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:29:10,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:10,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-19 23:29:10,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:10,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:10,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:10,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:10,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-19 23:29:10,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282673530] [2019-11-19 23:29:10,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-19 23:29:10,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:10,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-19 23:29:10,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-19 23:29:10,753 INFO L87 Difference]: Start difference. First operand 5774 states and 12937 transitions. Second operand 18 states. [2019-11-19 23:29:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:11,310 INFO L93 Difference]: Finished difference Result 9221 states and 21118 transitions. [2019-11-19 23:29:11,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-19 23:29:11,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2019-11-19 23:29:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:11,317 INFO L225 Difference]: With dead ends: 9221 [2019-11-19 23:29:11,317 INFO L226 Difference]: Without dead ends: 6566 [2019-11-19 23:29:11,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2019-11-19 23:29:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2019-11-19 23:29:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 6062. [2019-11-19 23:29:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6062 states. [2019-11-19 23:29:11,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6062 states to 6062 states and 13513 transitions. [2019-11-19 23:29:11,404 INFO L78 Accepts]: Start accepts. Automaton has 6062 states and 13513 transitions. Word has length 70 [2019-11-19 23:29:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:11,404 INFO L462 AbstractCegarLoop]: Abstraction has 6062 states and 13513 transitions. [2019-11-19 23:29:11,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-19 23:29:11,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6062 states and 13513 transitions. [2019-11-19 23:29:11,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-19 23:29:11,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:11,412 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:11,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:11,616 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1359537451, now seen corresponding path program 11 times [2019-11-19 23:29:11,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:11,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823997490] [2019-11-19 23:29:11,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:11,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823997490] [2019-11-19 23:29:11,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276593060] [2019-11-19 23:29:11,819 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:11,883 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-19 23:29:11,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:11,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-19 23:29:11,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:11,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:11,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:11,929 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:11,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:11,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-19 23:29:11,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046058217] [2019-11-19 23:29:11,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-19 23:29:11,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:11,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-19 23:29:11,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-11-19 23:29:11,931 INFO L87 Difference]: Start difference. First operand 6062 states and 13513 transitions. Second operand 19 states. [2019-11-19 23:29:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:12,521 INFO L93 Difference]: Finished difference Result 8519 states and 19273 transitions. [2019-11-19 23:29:12,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-19 23:29:12,521 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2019-11-19 23:29:12,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:12,528 INFO L225 Difference]: With dead ends: 8519 [2019-11-19 23:29:12,528 INFO L226 Difference]: Without dead ends: 6818 [2019-11-19 23:29:12,529 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2019-11-19 23:29:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6818 states. [2019-11-19 23:29:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6818 to 4415. [2019-11-19 23:29:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4415 states. [2019-11-19 23:29:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 10183 transitions. [2019-11-19 23:29:12,603 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 10183 transitions. Word has length 74 [2019-11-19 23:29:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:12,603 INFO L462 AbstractCegarLoop]: Abstraction has 4415 states and 10183 transitions. [2019-11-19 23:29:12,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-19 23:29:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 10183 transitions. [2019-11-19 23:29:12,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-19 23:29:12,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:12,608 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:12,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:12,812 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1307564872, now seen corresponding path program 12 times [2019-11-19 23:29:12,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:12,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587359107] [2019-11-19 23:29:12,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:13,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587359107] [2019-11-19 23:29:13,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096958589] [2019-11-19 23:29:13,042 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:13,122 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-19 23:29:13,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:13,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 23:29:13,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:13,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:13,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:13,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:13,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:13,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-19 23:29:13,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076291659] [2019-11-19 23:29:13,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-19 23:29:13,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:13,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-19 23:29:13,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-19 23:29:13,171 INFO L87 Difference]: Start difference. First operand 4415 states and 10183 transitions. Second operand 20 states. [2019-11-19 23:29:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:13,853 INFO L93 Difference]: Finished difference Result 9761 states and 22198 transitions. [2019-11-19 23:29:13,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-19 23:29:13,854 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-11-19 23:29:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:13,859 INFO L225 Difference]: With dead ends: 9761 [2019-11-19 23:29:13,859 INFO L226 Difference]: Without dead ends: 7106 [2019-11-19 23:29:13,860 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2019-11-19 23:29:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2019-11-19 23:29:13,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 4550. [2019-11-19 23:29:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4550 states. [2019-11-19 23:29:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4550 states to 4550 states and 10447 transitions. [2019-11-19 23:29:13,941 INFO L78 Accepts]: Start accepts. Automaton has 4550 states and 10447 transitions. Word has length 78 [2019-11-19 23:29:13,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:13,941 INFO L462 AbstractCegarLoop]: Abstraction has 4550 states and 10447 transitions. [2019-11-19 23:29:13,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-19 23:29:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4550 states and 10447 transitions. [2019-11-19 23:29:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-19 23:29:13,947 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:13,947 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:14,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:14,152 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1468993307, now seen corresponding path program 13 times [2019-11-19 23:29:14,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:14,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290845810] [2019-11-19 23:29:14,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:14,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290845810] [2019-11-19 23:29:14,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007403324] [2019-11-19 23:29:14,389 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:14,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-19 23:29:14,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:14,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:14,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:14,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:14,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-19 23:29:14,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971822736] [2019-11-19 23:29:14,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-19 23:29:14,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:14,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-19 23:29:14,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-11-19 23:29:14,485 INFO L87 Difference]: Start difference. First operand 4550 states and 10447 transitions. Second operand 21 states. [2019-11-19 23:29:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:15,455 INFO L93 Difference]: Finished difference Result 10049 states and 22774 transitions. [2019-11-19 23:29:15,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-19 23:29:15,455 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-11-19 23:29:15,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:15,462 INFO L225 Difference]: With dead ends: 10049 [2019-11-19 23:29:15,462 INFO L226 Difference]: Without dead ends: 7178 [2019-11-19 23:29:15,463 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2019-11-19 23:29:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2019-11-19 23:29:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 6926. [2019-11-19 23:29:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6926 states. [2019-11-19 23:29:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6926 states to 6926 states and 15241 transitions. [2019-11-19 23:29:15,557 INFO L78 Accepts]: Start accepts. Automaton has 6926 states and 15241 transitions. Word has length 82 [2019-11-19 23:29:15,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:15,557 INFO L462 AbstractCegarLoop]: Abstraction has 6926 states and 15241 transitions. [2019-11-19 23:29:15,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-19 23:29:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6926 states and 15241 transitions. [2019-11-19 23:29:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-19 23:29:15,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:15,566 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:15,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:15,770 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:15,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:15,770 INFO L82 PathProgramCache]: Analyzing trace with hash -306021886, now seen corresponding path program 14 times [2019-11-19 23:29:15,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:15,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587503993] [2019-11-19 23:29:15,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:16,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587503993] [2019-11-19 23:29:16,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882374631] [2019-11-19 23:29:16,099 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:16,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:29:16,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:16,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-19 23:29:16,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:16,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:16,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:16,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:16,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:16,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-19 23:29:16,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789796451] [2019-11-19 23:29:16,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-19 23:29:16,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:16,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-19 23:29:16,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-19 23:29:16,240 INFO L87 Difference]: Start difference. First operand 6926 states and 15241 transitions. Second operand 22 states. [2019-11-19 23:29:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:17,382 INFO L93 Difference]: Finished difference Result 10121 states and 22918 transitions. [2019-11-19 23:29:17,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-19 23:29:17,382 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2019-11-19 23:29:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:17,391 INFO L225 Difference]: With dead ends: 10121 [2019-11-19 23:29:17,391 INFO L226 Difference]: Without dead ends: 7250 [2019-11-19 23:29:17,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2019-11-19 23:29:17,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7250 states. [2019-11-19 23:29:17,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7250 to 4622. [2019-11-19 23:29:17,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4622 states. [2019-11-19 23:29:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 10591 transitions. [2019-11-19 23:29:17,478 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 10591 transitions. Word has length 86 [2019-11-19 23:29:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:17,479 INFO L462 AbstractCegarLoop]: Abstraction has 4622 states and 10591 transitions. [2019-11-19 23:29:17,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-19 23:29:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 10591 transitions. [2019-11-19 23:29:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-19 23:29:17,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:17,488 INFO L410 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, 1] [2019-11-19 23:29:17,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:17,693 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:17,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1034509665, now seen corresponding path program 15 times [2019-11-19 23:29:17,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:17,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492710539] [2019-11-19 23:29:17,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:18,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492710539] [2019-11-19 23:29:18,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596975260] [2019-11-19 23:29:18,009 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:18,081 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-19 23:29:18,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:18,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-19 23:29:18,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:18,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:18,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:18,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:18,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:18,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-19 23:29:18,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705148326] [2019-11-19 23:29:18,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-19 23:29:18,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:18,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-19 23:29:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-11-19 23:29:18,136 INFO L87 Difference]: Start difference. First operand 4622 states and 10591 transitions. Second operand 23 states. [2019-11-19 23:29:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:18,956 INFO L93 Difference]: Finished difference Result 9311 states and 20857 transitions. [2019-11-19 23:29:18,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-19 23:29:18,957 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2019-11-19 23:29:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:18,964 INFO L225 Difference]: With dead ends: 9311 [2019-11-19 23:29:18,964 INFO L226 Difference]: Without dead ends: 7394 [2019-11-19 23:29:18,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2019-11-19 23:29:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7394 states. [2019-11-19 23:29:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7394 to 4775. [2019-11-19 23:29:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4775 states. [2019-11-19 23:29:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4775 states to 4775 states and 10903 transitions. [2019-11-19 23:29:19,041 INFO L78 Accepts]: Start accepts. Automaton has 4775 states and 10903 transitions. Word has length 90 [2019-11-19 23:29:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:19,041 INFO L462 AbstractCegarLoop]: Abstraction has 4775 states and 10903 transitions. [2019-11-19 23:29:19,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-19 23:29:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4775 states and 10903 transitions. [2019-11-19 23:29:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-19 23:29:19,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:19,046 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 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, 1] [2019-11-19 23:29:19,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:19,248 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:19,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1848656196, now seen corresponding path program 16 times [2019-11-19 23:29:19,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:19,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420686803] [2019-11-19 23:29:19,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:19,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420686803] [2019-11-19 23:29:19,603 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012629178] [2019-11-19 23:29:19,603 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:19,667 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:29:19,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:19,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-19 23:29:19,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:19,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:19,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:19,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:19,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-19 23:29:19,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950723900] [2019-11-19 23:29:19,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-19 23:29:19,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-19 23:29:19,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-11-19 23:29:19,703 INFO L87 Difference]: Start difference. First operand 4775 states and 10903 transitions. Second operand 24 states. [2019-11-19 23:29:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:20,473 INFO L93 Difference]: Finished difference Result 9851 states and 21937 transitions. [2019-11-19 23:29:20,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-19 23:29:20,474 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-11-19 23:29:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:20,480 INFO L225 Difference]: With dead ends: 9851 [2019-11-19 23:29:20,480 INFO L226 Difference]: Without dead ends: 8150 [2019-11-19 23:29:20,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=1339, Unknown=0, NotChecked=0, Total=1892 [2019-11-19 23:29:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8150 states. [2019-11-19 23:29:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8150 to 7790. [2019-11-19 23:29:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7790 states. [2019-11-19 23:29:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 16969 transitions. [2019-11-19 23:29:20,568 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 16969 transitions. Word has length 94 [2019-11-19 23:29:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:20,569 INFO L462 AbstractCegarLoop]: Abstraction has 7790 states and 16969 transitions. [2019-11-19 23:29:20,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-19 23:29:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 16969 transitions. [2019-11-19 23:29:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-19 23:29:20,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:20,576 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 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, 1] [2019-11-19 23:29:20,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:20,777 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash 833878617, now seen corresponding path program 17 times [2019-11-19 23:29:20,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:20,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332484270] [2019-11-19 23:29:20,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:21,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332484270] [2019-11-19 23:29:21,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943048] [2019-11-19 23:29:21,168 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:21,260 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-19 23:29:21,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:21,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-19 23:29:21,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:21,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:21,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:21,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:21,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-19 23:29:21,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070008319] [2019-11-19 23:29:21,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-19 23:29:21,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:21,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-19 23:29:21,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-11-19 23:29:21,331 INFO L87 Difference]: Start difference. First operand 7790 states and 16969 transitions. Second operand 25 states. [2019-11-19 23:29:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:22,379 INFO L93 Difference]: Finished difference Result 10103 states and 22441 transitions. [2019-11-19 23:29:22,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-19 23:29:22,379 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2019-11-19 23:29:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:22,387 INFO L225 Difference]: With dead ends: 10103 [2019-11-19 23:29:22,388 INFO L226 Difference]: Without dead ends: 8186 [2019-11-19 23:29:22,389 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2019-11-19 23:29:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8186 states. [2019-11-19 23:29:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8186 to 8078. [2019-11-19 23:29:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8078 states. [2019-11-19 23:29:22,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8078 states to 8078 states and 17545 transitions. [2019-11-19 23:29:22,492 INFO L78 Accepts]: Start accepts. Automaton has 8078 states and 17545 transitions. Word has length 98 [2019-11-19 23:29:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:22,492 INFO L462 AbstractCegarLoop]: Abstraction has 8078 states and 17545 transitions. [2019-11-19 23:29:22,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-19 23:29:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 8078 states and 17545 transitions. [2019-11-19 23:29:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-19 23:29:22,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:22,503 INFO L410 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, 1] [2019-11-19 23:29:22,707 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:22,707 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:22,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:22,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1072584330, now seen corresponding path program 18 times [2019-11-19 23:29:22,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:22,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787195667] [2019-11-19 23:29:22,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:23,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787195667] [2019-11-19 23:29:23,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646062993] [2019-11-19 23:29:23,137 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:23,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-19 23:29:23,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:23,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-19 23:29:23,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:23,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:23,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:23,272 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:23,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:23,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-19 23:29:23,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172669476] [2019-11-19 23:29:23,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-19 23:29:23,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:23,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-19 23:29:23,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2019-11-19 23:29:23,283 INFO L87 Difference]: Start difference. First operand 8078 states and 17545 transitions. Second operand 26 states. [2019-11-19 23:29:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:24,337 INFO L93 Difference]: Finished difference Result 11273 states and 25222 transitions. [2019-11-19 23:29:24,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-19 23:29:24,337 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 102 [2019-11-19 23:29:24,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:24,343 INFO L225 Difference]: With dead ends: 11273 [2019-11-19 23:29:24,343 INFO L226 Difference]: Without dead ends: 8402 [2019-11-19 23:29:24,344 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=650, Invalid=1800, Unknown=0, NotChecked=0, Total=2450 [2019-11-19 23:29:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2019-11-19 23:29:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 5198. [2019-11-19 23:29:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5198 states. [2019-11-19 23:29:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 11743 transitions. [2019-11-19 23:29:24,409 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 11743 transitions. Word has length 102 [2019-11-19 23:29:24,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:24,409 INFO L462 AbstractCegarLoop]: Abstraction has 5198 states and 11743 transitions. [2019-11-19 23:29:24,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-19 23:29:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 11743 transitions. [2019-11-19 23:29:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-19 23:29:24,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:24,414 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:24,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:24,615 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:24,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:24,615 INFO L82 PathProgramCache]: Analyzing trace with hash -276629485, now seen corresponding path program 19 times [2019-11-19 23:29:24,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:24,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126283720] [2019-11-19 23:29:24,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:24,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126283720] [2019-11-19 23:29:24,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519422750] [2019-11-19 23:29:24,988 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:25,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-19 23:29:25,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:25,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:25,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:25,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:25,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-19 23:29:25,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303959212] [2019-11-19 23:29:25,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-19 23:29:25,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:25,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-19 23:29:25,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2019-11-19 23:29:25,115 INFO L87 Difference]: Start difference. First operand 5198 states and 11743 transitions. Second operand 27 states. [2019-11-19 23:29:26,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:26,100 INFO L93 Difference]: Finished difference Result 10463 states and 23161 transitions. [2019-11-19 23:29:26,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-19 23:29:26,100 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2019-11-19 23:29:26,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:26,106 INFO L225 Difference]: With dead ends: 10463 [2019-11-19 23:29:26,106 INFO L226 Difference]: Without dead ends: 8546 [2019-11-19 23:29:26,107 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=1785, Unknown=0, NotChecked=0, Total=2550 [2019-11-19 23:29:26,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2019-11-19 23:29:26,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 5351. [2019-11-19 23:29:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5351 states. [2019-11-19 23:29:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5351 states to 5351 states and 12055 transitions. [2019-11-19 23:29:26,175 INFO L78 Accepts]: Start accepts. Automaton has 5351 states and 12055 transitions. Word has length 106 [2019-11-19 23:29:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:26,176 INFO L462 AbstractCegarLoop]: Abstraction has 5351 states and 12055 transitions. [2019-11-19 23:29:26,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-19 23:29:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 5351 states and 12055 transitions. [2019-11-19 23:29:26,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-19 23:29:26,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:26,182 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:26,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:26,385 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1686256176, now seen corresponding path program 20 times [2019-11-19 23:29:26,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:26,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268848002] [2019-11-19 23:29:26,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:26,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268848002] [2019-11-19 23:29:26,840 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373881238] [2019-11-19 23:29:26,840 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:26,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:29:26,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:26,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-19 23:29:26,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:27,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:27,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:27,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:27,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:27,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-19 23:29:27,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138072893] [2019-11-19 23:29:27,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-19 23:29:27,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-19 23:29:27,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2019-11-19 23:29:27,039 INFO L87 Difference]: Start difference. First operand 5351 states and 12055 transitions. Second operand 28 states. [2019-11-19 23:29:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:28,002 INFO L93 Difference]: Finished difference Result 10751 states and 23737 transitions. [2019-11-19 23:29:28,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-19 23:29:28,003 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 110 [2019-11-19 23:29:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:28,009 INFO L225 Difference]: With dead ends: 10751 [2019-11-19 23:29:28,009 INFO L226 Difference]: Without dead ends: 8834 [2019-11-19 23:29:28,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=753, Invalid=2003, Unknown=0, NotChecked=0, Total=2756 [2019-11-19 23:29:28,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8834 states. [2019-11-19 23:29:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8834 to 5486. [2019-11-19 23:29:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2019-11-19 23:29:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 12319 transitions. [2019-11-19 23:29:28,077 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 12319 transitions. Word has length 110 [2019-11-19 23:29:28,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:28,078 INFO L462 AbstractCegarLoop]: Abstraction has 5486 states and 12319 transitions. [2019-11-19 23:29:28,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-19 23:29:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 12319 transitions. [2019-11-19 23:29:28,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-19 23:29:28,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:28,082 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:28,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:28,286 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:28,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1522375629, now seen corresponding path program 21 times [2019-11-19 23:29:28,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:28,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331705543] [2019-11-19 23:29:28,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:28,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331705543] [2019-11-19 23:29:28,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40205131] [2019-11-19 23:29:28,664 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:28,765 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-19 23:29:28,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:28,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-19 23:29:28,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:28,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:28,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:28,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:28,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:28,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-19 23:29:28,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804070804] [2019-11-19 23:29:28,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-19 23:29:28,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:28,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-19 23:29:28,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2019-11-19 23:29:28,824 INFO L87 Difference]: Start difference. First operand 5486 states and 12319 transitions. Second operand 29 states. [2019-11-19 23:29:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:29,881 INFO L93 Difference]: Finished difference Result 11039 states and 24313 transitions. [2019-11-19 23:29:29,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-19 23:29:29,882 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 114 [2019-11-19 23:29:29,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:29,889 INFO L225 Difference]: With dead ends: 11039 [2019-11-19 23:29:29,889 INFO L226 Difference]: Without dead ends: 9122 [2019-11-19 23:29:29,890 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=2166, Unknown=0, NotChecked=0, Total=2970 [2019-11-19 23:29:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2019-11-19 23:29:29,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 5639. [2019-11-19 23:29:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5639 states. [2019-11-19 23:29:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5639 states to 5639 states and 12631 transitions. [2019-11-19 23:29:29,967 INFO L78 Accepts]: Start accepts. Automaton has 5639 states and 12631 transitions. Word has length 114 [2019-11-19 23:29:29,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:29,968 INFO L462 AbstractCegarLoop]: Abstraction has 5639 states and 12631 transitions. [2019-11-19 23:29:29,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-19 23:29:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 5639 states and 12631 transitions. [2019-11-19 23:29:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-19 23:29:29,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:29,971 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:30,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:30,174 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash -786730774, now seen corresponding path program 22 times [2019-11-19 23:29:30,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:30,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13333476] [2019-11-19 23:29:30,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:30,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13333476] [2019-11-19 23:29:30,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708704348] [2019-11-19 23:29:30,708 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:30,804 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:29:30,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:30,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-19 23:29:30,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:30,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:30,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:30,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:30,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-19 23:29:30,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740266368] [2019-11-19 23:29:30,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-19 23:29:30,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:30,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-19 23:29:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-11-19 23:29:30,869 INFO L87 Difference]: Start difference. First operand 5639 states and 12631 transitions. Second operand 30 states. [2019-11-19 23:29:31,088 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2019-11-19 23:29:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:32,239 INFO L93 Difference]: Finished difference Result 11579 states and 25393 transitions. [2019-11-19 23:29:32,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-19 23:29:32,239 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 118 [2019-11-19 23:29:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:32,247 INFO L225 Difference]: With dead ends: 11579 [2019-11-19 23:29:32,247 INFO L226 Difference]: Without dead ends: 9878 [2019-11-19 23:29:32,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=910, Invalid=2170, Unknown=0, NotChecked=0, Total=3080 [2019-11-19 23:29:32,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9878 states. [2019-11-19 23:29:32,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9878 to 9518. [2019-11-19 23:29:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9518 states. [2019-11-19 23:29:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9518 states to 9518 states and 20425 transitions. [2019-11-19 23:29:32,345 INFO L78 Accepts]: Start accepts. Automaton has 9518 states and 20425 transitions. Word has length 118 [2019-11-19 23:29:32,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:32,345 INFO L462 AbstractCegarLoop]: Abstraction has 9518 states and 20425 transitions. [2019-11-19 23:29:32,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-19 23:29:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 9518 states and 20425 transitions. [2019-11-19 23:29:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-19 23:29:32,352 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:32,352 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:32,556 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:32,556 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 945677703, now seen corresponding path program 23 times [2019-11-19 23:29:32,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:32,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660632855] [2019-11-19 23:29:32,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:32,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660632855] [2019-11-19 23:29:32,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400477071] [2019-11-19 23:29:32,951 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:33,036 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-19 23:29:33,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:33,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-19 23:29:33,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:33,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:33,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:33,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:33,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-19 23:29:33,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112224870] [2019-11-19 23:29:33,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-19 23:29:33,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-19 23:29:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2019-11-19 23:29:33,087 INFO L87 Difference]: Start difference. First operand 9518 states and 20425 transitions. Second operand 31 states. [2019-11-19 23:29:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:34,314 INFO L93 Difference]: Finished difference Result 11831 states and 25897 transitions. [2019-11-19 23:29:34,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-19 23:29:34,315 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 122 [2019-11-19 23:29:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:34,322 INFO L225 Difference]: With dead ends: 11831 [2019-11-19 23:29:34,322 INFO L226 Difference]: Without dead ends: 9914 [2019-11-19 23:29:34,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1031, Invalid=2391, Unknown=0, NotChecked=0, Total=3422 [2019-11-19 23:29:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9914 states. [2019-11-19 23:29:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9914 to 9806. [2019-11-19 23:29:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9806 states. [2019-11-19 23:29:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9806 states to 9806 states and 21001 transitions. [2019-11-19 23:29:34,412 INFO L78 Accepts]: Start accepts. Automaton has 9806 states and 21001 transitions. Word has length 122 [2019-11-19 23:29:34,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:34,412 INFO L462 AbstractCegarLoop]: Abstraction has 9806 states and 21001 transitions. [2019-11-19 23:29:34,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-19 23:29:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9806 states and 21001 transitions. [2019-11-19 23:29:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-19 23:29:34,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:34,419 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:34,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:34,619 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:34,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:34,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1109963356, now seen corresponding path program 24 times [2019-11-19 23:29:34,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:34,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462472827] [2019-11-19 23:29:34,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:35,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462472827] [2019-11-19 23:29:35,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697670830] [2019-11-19 23:29:35,180 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:35,286 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-19 23:29:35,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:35,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-19 23:29:35,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:35,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:35,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:35,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:35,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:35,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-19 23:29:35,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193605190] [2019-11-19 23:29:35,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-19 23:29:35,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:35,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-19 23:29:35,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2019-11-19 23:29:35,344 INFO L87 Difference]: Start difference. First operand 9806 states and 21001 transitions. Second operand 32 states. [2019-11-19 23:29:36,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:36,559 INFO L93 Difference]: Finished difference Result 13253 states and 29182 transitions. [2019-11-19 23:29:36,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-19 23:29:36,559 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2019-11-19 23:29:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:36,566 INFO L225 Difference]: With dead ends: 13253 [2019-11-19 23:29:36,567 INFO L226 Difference]: Without dead ends: 10598 [2019-11-19 23:29:36,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1010, Invalid=2772, Unknown=0, NotChecked=0, Total=3782 [2019-11-19 23:29:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10598 states. [2019-11-19 23:29:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10598 to 10094. [2019-11-19 23:29:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10094 states. [2019-11-19 23:29:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 21577 transitions. [2019-11-19 23:29:36,663 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 21577 transitions. Word has length 126 [2019-11-19 23:29:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:36,664 INFO L462 AbstractCegarLoop]: Abstraction has 10094 states and 21577 transitions. [2019-11-19 23:29:36,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-19 23:29:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 21577 transitions. [2019-11-19 23:29:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-19 23:29:36,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:36,671 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:36,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:36,871 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:36,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1285696191, now seen corresponding path program 25 times [2019-11-19 23:29:36,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:36,872 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756042927] [2019-11-19 23:29:36,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:37,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756042927] [2019-11-19 23:29:37,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385212240] [2019-11-19 23:29:37,433 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:37,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-19 23:29:37,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:37,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:37,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:37,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:37,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-19 23:29:37,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958813267] [2019-11-19 23:29:37,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-19 23:29:37,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-19 23:29:37,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2019-11-19 23:29:37,567 INFO L87 Difference]: Start difference. First operand 10094 states and 21577 transitions. Second operand 33 states. [2019-11-19 23:29:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:38,681 INFO L93 Difference]: Finished difference Result 12407 states and 27049 transitions. [2019-11-19 23:29:38,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-19 23:29:38,682 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 130 [2019-11-19 23:29:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:38,689 INFO L225 Difference]: With dead ends: 12407 [2019-11-19 23:29:38,689 INFO L226 Difference]: Without dead ends: 10490 [2019-11-19 23:29:38,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1179, Invalid=2727, Unknown=0, NotChecked=0, Total=3906 [2019-11-19 23:29:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10490 states. [2019-11-19 23:29:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10490 to 10382. [2019-11-19 23:29:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10382 states. [2019-11-19 23:29:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10382 states to 10382 states and 22153 transitions. [2019-11-19 23:29:38,783 INFO L78 Accepts]: Start accepts. Automaton has 10382 states and 22153 transitions. Word has length 130 [2019-11-19 23:29:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:38,783 INFO L462 AbstractCegarLoop]: Abstraction has 10382 states and 22153 transitions. [2019-11-19 23:29:38,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-19 23:29:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10382 states and 22153 transitions. [2019-11-19 23:29:38,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-19 23:29:38,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:38,791 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:38,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:38,994 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:38,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:38,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1219481694, now seen corresponding path program 26 times [2019-11-19 23:29:38,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:38,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283856880] [2019-11-19 23:29:38,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:39,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283856880] [2019-11-19 23:29:39,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97420323] [2019-11-19 23:29:39,547 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:39,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:29:39,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:39,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-19 23:29:39,631 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:39,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:39,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:39,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:39,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:39,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-19 23:29:39,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109433039] [2019-11-19 23:29:39,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-19 23:29:39,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:39,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-19 23:29:39,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2019-11-19 23:29:39,680 INFO L87 Difference]: Start difference. First operand 10382 states and 22153 transitions. Second operand 34 states. [2019-11-19 23:29:41,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:41,077 INFO L93 Difference]: Finished difference Result 13829 states and 30334 transitions. [2019-11-19 23:29:41,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-19 23:29:41,077 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 134 [2019-11-19 23:29:41,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:41,085 INFO L225 Difference]: With dead ends: 13829 [2019-11-19 23:29:41,085 INFO L226 Difference]: Without dead ends: 11174 [2019-11-19 23:29:41,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2019-11-19 23:29:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11174 states. [2019-11-19 23:29:41,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11174 to 10670. [2019-11-19 23:29:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10670 states. [2019-11-19 23:29:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10670 states to 10670 states and 22729 transitions. [2019-11-19 23:29:41,183 INFO L78 Accepts]: Start accepts. Automaton has 10670 states and 22729 transitions. Word has length 134 [2019-11-19 23:29:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:41,183 INFO L462 AbstractCegarLoop]: Abstraction has 10670 states and 22729 transitions. [2019-11-19 23:29:41,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-19 23:29:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 10670 states and 22729 transitions. [2019-11-19 23:29:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-19 23:29:41,191 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:41,191 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:41,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:41,400 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:41,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1555524347, now seen corresponding path program 27 times [2019-11-19 23:29:41,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:41,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471230660] [2019-11-19 23:29:41,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:41,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471230660] [2019-11-19 23:29:41,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603542103] [2019-11-19 23:29:41,950 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:42,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-19 23:29:42,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:42,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-19 23:29:42,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:42,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:42,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:42,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:42,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:42,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-19 23:29:42,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572545670] [2019-11-19 23:29:42,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-19 23:29:42,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-19 23:29:42,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2019-11-19 23:29:42,150 INFO L87 Difference]: Start difference. First operand 10670 states and 22729 transitions. Second operand 35 states. [2019-11-19 23:29:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:43,780 INFO L93 Difference]: Finished difference Result 13127 states and 28489 transitions. [2019-11-19 23:29:43,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-19 23:29:43,781 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 138 [2019-11-19 23:29:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:43,790 INFO L225 Difference]: With dead ends: 13127 [2019-11-19 23:29:43,790 INFO L226 Difference]: Without dead ends: 11426 [2019-11-19 23:29:43,791 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1203, Invalid=3219, Unknown=0, NotChecked=0, Total=4422 [2019-11-19 23:29:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11426 states. [2019-11-19 23:29:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11426 to 6719. [2019-11-19 23:29:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6719 states. [2019-11-19 23:29:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6719 states to 6719 states and 14791 transitions. [2019-11-19 23:29:43,881 INFO L78 Accepts]: Start accepts. Automaton has 6719 states and 14791 transitions. Word has length 138 [2019-11-19 23:29:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:43,881 INFO L462 AbstractCegarLoop]: Abstraction has 6719 states and 14791 transitions. [2019-11-19 23:29:43,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-19 23:29:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6719 states and 14791 transitions. [2019-11-19 23:29:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-19 23:29:43,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:43,885 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:44,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:44,086 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:44,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:44,086 INFO L82 PathProgramCache]: Analyzing trace with hash -174130920, now seen corresponding path program 28 times [2019-11-19 23:29:44,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:44,086 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666381441] [2019-11-19 23:29:44,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:44,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666381441] [2019-11-19 23:29:44,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926186689] [2019-11-19 23:29:44,864 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:44,952 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:29:44,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:44,954 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-19 23:29:44,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:44,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:44,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:45,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:45,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-19 23:29:45,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820289090] [2019-11-19 23:29:45,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-19 23:29:45,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:45,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-19 23:29:45,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=964, Unknown=0, NotChecked=0, Total=1260 [2019-11-19 23:29:45,013 INFO L87 Difference]: Start difference. First operand 6719 states and 14791 transitions. Second operand 36 states. [2019-11-19 23:29:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:46,677 INFO L93 Difference]: Finished difference Result 14369 states and 31414 transitions. [2019-11-19 23:29:46,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-19 23:29:46,678 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-19 23:29:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:46,684 INFO L225 Difference]: With dead ends: 14369 [2019-11-19 23:29:46,684 INFO L226 Difference]: Without dead ends: 11282 [2019-11-19 23:29:46,685 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1367, Invalid=3325, Unknown=0, NotChecked=0, Total=4692 [2019-11-19 23:29:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11282 states. [2019-11-19 23:29:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11282 to 6638. [2019-11-19 23:29:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6638 states. [2019-11-19 23:29:46,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 14623 transitions. [2019-11-19 23:29:46,758 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 14623 transitions. Word has length 142 [2019-11-19 23:29:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:46,759 INFO L462 AbstractCegarLoop]: Abstraction has 6638 states and 14623 transitions. [2019-11-19 23:29:46,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-19 23:29:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 14623 transitions. [2019-11-19 23:29:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-19 23:29:46,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:46,763 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:46,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:46,964 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash 728016565, now seen corresponding path program 29 times [2019-11-19 23:29:46,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:46,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667188521] [2019-11-19 23:29:46,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:47,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667188521] [2019-11-19 23:29:47,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35304476] [2019-11-19 23:29:47,475 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:47,569 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-19 23:29:47,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:47,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-19 23:29:47,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:47,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:47,600 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:47,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:47,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-19 23:29:47,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741903569] [2019-11-19 23:29:47,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-19 23:29:47,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:47,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-19 23:29:47,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2019-11-19 23:29:47,618 INFO L87 Difference]: Start difference. First operand 6638 states and 14623 transitions. Second operand 37 states. [2019-11-19 23:29:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:48,962 INFO L93 Difference]: Finished difference Result 13343 states and 28921 transitions. [2019-11-19 23:29:48,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-19 23:29:48,962 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 146 [2019-11-19 23:29:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:48,971 INFO L225 Difference]: With dead ends: 13343 [2019-11-19 23:29:48,971 INFO L226 Difference]: Without dead ends: 11426 [2019-11-19 23:29:48,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1505, Invalid=3465, Unknown=0, NotChecked=0, Total=4970 [2019-11-19 23:29:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11426 states. [2019-11-19 23:29:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11426 to 6791. [2019-11-19 23:29:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6791 states. [2019-11-19 23:29:49,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6791 states to 6791 states and 14935 transitions. [2019-11-19 23:29:49,061 INFO L78 Accepts]: Start accepts. Automaton has 6791 states and 14935 transitions. Word has length 146 [2019-11-19 23:29:49,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:49,062 INFO L462 AbstractCegarLoop]: Abstraction has 6791 states and 14935 transitions. [2019-11-19 23:29:49,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-19 23:29:49,062 INFO L276 IsEmpty]: Start isEmpty. Operand 6791 states and 14935 transitions. [2019-11-19 23:29:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-19 23:29:49,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:49,068 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:49,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:49,273 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1365325870, now seen corresponding path program 30 times [2019-11-19 23:29:49,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:49,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593812227] [2019-11-19 23:29:49,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:49,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593812227] [2019-11-19 23:29:49,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218416454] [2019-11-19 23:29:49,774 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:49,865 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-19 23:29:49,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:49,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-19 23:29:49,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:49,907 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:49,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:49,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 931 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:49,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:49,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-19 23:29:49,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780450968] [2019-11-19 23:29:49,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-19 23:29:49,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:49,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-19 23:29:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2019-11-19 23:29:49,932 INFO L87 Difference]: Start difference. First operand 6791 states and 14935 transitions. Second operand 38 states. [2019-11-19 23:29:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:51,362 INFO L93 Difference]: Finished difference Result 13631 states and 29497 transitions. [2019-11-19 23:29:51,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-19 23:29:51,363 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 150 [2019-11-19 23:29:51,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:51,370 INFO L225 Difference]: With dead ends: 13631 [2019-11-19 23:29:51,370 INFO L226 Difference]: Without dead ends: 11714 [2019-11-19 23:29:51,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1443, Invalid=3813, Unknown=0, NotChecked=0, Total=5256 [2019-11-19 23:29:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11714 states. [2019-11-19 23:29:51,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11714 to 6926. [2019-11-19 23:29:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6926 states. [2019-11-19 23:29:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6926 states to 6926 states and 15199 transitions. [2019-11-19 23:29:51,520 INFO L78 Accepts]: Start accepts. Automaton has 6926 states and 15199 transitions. Word has length 150 [2019-11-19 23:29:51,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:51,520 INFO L462 AbstractCegarLoop]: Abstraction has 6926 states and 15199 transitions. [2019-11-19 23:29:51,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-19 23:29:51,520 INFO L276 IsEmpty]: Start isEmpty. Operand 6926 states and 15199 transitions. [2019-11-19 23:29:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-19 23:29:51,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:51,524 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:51,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:51,724 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2086635631, now seen corresponding path program 31 times [2019-11-19 23:29:51,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:51,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384516871] [2019-11-19 23:29:51,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:52,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384516871] [2019-11-19 23:29:52,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558274625] [2019-11-19 23:29:52,387 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:52,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-19 23:29:52,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:52,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:52,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:52,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:52,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-19 23:29:52,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665287710] [2019-11-19 23:29:52,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-19 23:29:52,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:52,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-19 23:29:52,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2019-11-19 23:29:52,549 INFO L87 Difference]: Start difference. First operand 6926 states and 15199 transitions. Second operand 39 states. [2019-11-19 23:29:54,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:54,521 INFO L93 Difference]: Finished difference Result 13919 states and 30073 transitions. [2019-11-19 23:29:54,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-19 23:29:54,521 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 154 [2019-11-19 23:29:54,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:54,530 INFO L225 Difference]: With dead ends: 13919 [2019-11-19 23:29:54,531 INFO L226 Difference]: Without dead ends: 12002 [2019-11-19 23:29:54,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1683, Invalid=3867, Unknown=0, NotChecked=0, Total=5550 [2019-11-19 23:29:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2019-11-19 23:29:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 7079. [2019-11-19 23:29:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7079 states. [2019-11-19 23:29:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7079 states to 7079 states and 15511 transitions. [2019-11-19 23:29:54,625 INFO L78 Accepts]: Start accepts. Automaton has 7079 states and 15511 transitions. Word has length 154 [2019-11-19 23:29:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:54,626 INFO L462 AbstractCegarLoop]: Abstraction has 7079 states and 15511 transitions. [2019-11-19 23:29:54,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-19 23:29:54,626 INFO L276 IsEmpty]: Start isEmpty. Operand 7079 states and 15511 transitions. [2019-11-19 23:29:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-19 23:29:54,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:54,630 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:54,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:54,830 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:54,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:54,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1012319092, now seen corresponding path program 32 times [2019-11-19 23:29:54,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:54,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564316062] [2019-11-19 23:29:54,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:55,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564316062] [2019-11-19 23:29:55,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422477584] [2019-11-19 23:29:55,412 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:55,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 23:29:55,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:55,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-19 23:29:55,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:55,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:55,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:55,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:55,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:55,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-19 23:29:55,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002303305] [2019-11-19 23:29:55,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-19 23:29:55,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:55,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-19 23:29:55,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2019-11-19 23:29:55,582 INFO L87 Difference]: Start difference. First operand 7079 states and 15511 transitions. Second operand 40 states. [2019-11-19 23:29:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:29:57,298 INFO L93 Difference]: Finished difference Result 14459 states and 31153 transitions. [2019-11-19 23:29:57,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-19 23:29:57,299 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 158 [2019-11-19 23:29:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:29:57,309 INFO L225 Difference]: With dead ends: 14459 [2019-11-19 23:29:57,309 INFO L226 Difference]: Without dead ends: 12758 [2019-11-19 23:29:57,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1608, Invalid=4244, Unknown=0, NotChecked=0, Total=5852 [2019-11-19 23:29:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12758 states. [2019-11-19 23:29:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12758 to 12398. [2019-11-19 23:29:57,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12398 states. [2019-11-19 23:29:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12398 states to 12398 states and 26185 transitions. [2019-11-19 23:29:57,449 INFO L78 Accepts]: Start accepts. Automaton has 12398 states and 26185 transitions. Word has length 158 [2019-11-19 23:29:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:29:57,449 INFO L462 AbstractCegarLoop]: Abstraction has 12398 states and 26185 transitions. [2019-11-19 23:29:57,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-19 23:29:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 12398 states and 26185 transitions. [2019-11-19 23:29:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-19 23:29:57,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:29:57,457 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:29:57,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:57,657 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:29:57,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:29:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash 312610857, now seen corresponding path program 33 times [2019-11-19 23:29:57,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:29:57,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259318872] [2019-11-19 23:29:57,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:29:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:29:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:58,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259318872] [2019-11-19 23:29:58,364 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159258461] [2019-11-19 23:29:58,364 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:29:58,459 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-19 23:29:58,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:29:58,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-19 23:29:58,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:29:58,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:58,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:58,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:29:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:29:58,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:29:58,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-19 23:29:58,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515261035] [2019-11-19 23:29:58,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-19 23:29:58,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:29:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-19 23:29:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=1253, Unknown=0, NotChecked=0, Total=1640 [2019-11-19 23:29:58,539 INFO L87 Difference]: Start difference. First operand 12398 states and 26185 transitions. Second operand 41 states. [2019-11-19 23:30:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:30:00,239 INFO L93 Difference]: Finished difference Result 14711 states and 31657 transitions. [2019-11-19 23:30:00,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-19 23:30:00,239 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 162 [2019-11-19 23:30:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:30:00,248 INFO L225 Difference]: With dead ends: 14711 [2019-11-19 23:30:00,248 INFO L226 Difference]: Without dead ends: 12794 [2019-11-19 23:30:00,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1683, Invalid=4479, Unknown=0, NotChecked=0, Total=6162 [2019-11-19 23:30:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12794 states. [2019-11-19 23:30:00,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12794 to 12686. [2019-11-19 23:30:00,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12686 states. [2019-11-19 23:30:00,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12686 states to 12686 states and 26761 transitions. [2019-11-19 23:30:00,354 INFO L78 Accepts]: Start accepts. Automaton has 12686 states and 26761 transitions. Word has length 162 [2019-11-19 23:30:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:30:00,354 INFO L462 AbstractCegarLoop]: Abstraction has 12686 states and 26761 transitions. [2019-11-19 23:30:00,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-19 23:30:00,355 INFO L276 IsEmpty]: Start isEmpty. Operand 12686 states and 26761 transitions. [2019-11-19 23:30:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-19 23:30:00,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:30:00,361 INFO L410 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:30:00,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:00,561 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:30:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:30:00,562 INFO L82 PathProgramCache]: Analyzing trace with hash -357017786, now seen corresponding path program 34 times [2019-11-19 23:30:00,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:30:00,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164631694] [2019-11-19 23:30:00,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:30:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:30:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:30:01,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164631694] [2019-11-19 23:30:01,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216698494] [2019-11-19 23:30:01,417 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:01,501 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-19 23:30:01,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:30:01,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-19 23:30:01,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:30:01,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:01,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 1191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:30:01,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:30:01,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-19 23:30:01,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670114372] [2019-11-19 23:30:01,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-19 23:30:01,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:30:01,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-19 23:30:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2019-11-19 23:30:01,604 INFO L87 Difference]: Start difference. First operand 12686 states and 26761 transitions. Second operand 42 states. [2019-11-19 23:30:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:30:03,424 INFO L93 Difference]: Finished difference Result 16133 states and 34942 transitions. [2019-11-19 23:30:03,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-19 23:30:03,429 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 166 [2019-11-19 23:30:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:30:03,439 INFO L225 Difference]: With dead ends: 16133 [2019-11-19 23:30:03,439 INFO L226 Difference]: Without dead ends: 13478 [2019-11-19 23:30:03,440 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1904, Invalid=4576, Unknown=0, NotChecked=0, Total=6480 [2019-11-19 23:30:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13478 states. [2019-11-19 23:30:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13478 to 12974. [2019-11-19 23:30:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12974 states. [2019-11-19 23:30:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12974 states to 12974 states and 27337 transitions. [2019-11-19 23:30:03,559 INFO L78 Accepts]: Start accepts. Automaton has 12974 states and 27337 transitions. Word has length 166 [2019-11-19 23:30:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:30:03,560 INFO L462 AbstractCegarLoop]: Abstraction has 12974 states and 27337 transitions. [2019-11-19 23:30:03,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-19 23:30:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 12974 states and 27337 transitions. [2019-11-19 23:30:03,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-19 23:30:03,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:30:03,569 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:30:03,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:03,769 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:30:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:30:03,770 INFO L82 PathProgramCache]: Analyzing trace with hash 388382179, now seen corresponding path program 35 times [2019-11-19 23:30:03,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:30:03,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266180960] [2019-11-19 23:30:03,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:30:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:30:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:30:04,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266180960] [2019-11-19 23:30:04,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043060029] [2019-11-19 23:30:04,429 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:04,525 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-19 23:30:04,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:30:04,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-19 23:30:04,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:30:04,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:04,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:30:04,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:30:04,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-19 23:30:04,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778014730] [2019-11-19 23:30:04,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-19 23:30:04,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:30:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-19 23:30:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2019-11-19 23:30:04,600 INFO L87 Difference]: Start difference. First operand 12974 states and 27337 transitions. Second operand 43 states. [2019-11-19 23:30:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:30:06,500 INFO L93 Difference]: Finished difference Result 15431 states and 33097 transitions. [2019-11-19 23:30:06,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-19 23:30:06,500 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 170 [2019-11-19 23:30:06,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:30:06,511 INFO L225 Difference]: With dead ends: 15431 [2019-11-19 23:30:06,511 INFO L226 Difference]: Without dead ends: 13730 [2019-11-19 23:30:06,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2069, Invalid=4737, Unknown=0, NotChecked=0, Total=6806 [2019-11-19 23:30:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13730 states. [2019-11-19 23:30:06,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13730 to 7871. [2019-11-19 23:30:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7871 states. [2019-11-19 23:30:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7871 states to 7871 states and 17095 transitions. [2019-11-19 23:30:06,615 INFO L78 Accepts]: Start accepts. Automaton has 7871 states and 17095 transitions. Word has length 170 [2019-11-19 23:30:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:30:06,615 INFO L462 AbstractCegarLoop]: Abstraction has 7871 states and 17095 transitions. [2019-11-19 23:30:06,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-19 23:30:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 7871 states and 17095 transitions. [2019-11-19 23:30:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-19 23:30:06,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:30:06,621 INFO L410 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:30:06,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:06,822 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:30:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:30:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1069946880, now seen corresponding path program 36 times [2019-11-19 23:30:06,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:30:06,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457665417] [2019-11-19 23:30:06,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:30:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:30:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:30:07,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457665417] [2019-11-19 23:30:07,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699600784] [2019-11-19 23:30:07,573 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:07,676 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-11-19 23:30:07,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 23:30:07,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-19 23:30:07,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:30:07,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:07,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:07,721 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 0 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:30:07,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:30:07,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-19 23:30:07,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375187753] [2019-11-19 23:30:07,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-19 23:30:07,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:30:07,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-19 23:30:07,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2019-11-19 23:30:07,747 INFO L87 Difference]: Start difference. First operand 7871 states and 17095 transitions. Second operand 44 states. [2019-11-19 23:30:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:30:09,885 INFO L93 Difference]: Finished difference Result 15791 states and 33817 transitions. [2019-11-19 23:30:09,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-19 23:30:09,885 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 174 [2019-11-19 23:30:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:30:09,894 INFO L225 Difference]: With dead ends: 15791 [2019-11-19 23:30:09,895 INFO L226 Difference]: Without dead ends: 13658 [2019-11-19 23:30:09,895 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1967, Invalid=5173, Unknown=0, NotChecked=0, Total=7140 [2019-11-19 23:30:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13658 states. [2019-11-19 23:30:10,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13658 to 13406. [2019-11-19 23:30:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13406 states. [2019-11-19 23:30:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13406 states to 13406 states and 28201 transitions. [2019-11-19 23:30:10,035 INFO L78 Accepts]: Start accepts. Automaton has 13406 states and 28201 transitions. Word has length 174 [2019-11-19 23:30:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:30:10,036 INFO L462 AbstractCegarLoop]: Abstraction has 13406 states and 28201 transitions. [2019-11-19 23:30:10,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-19 23:30:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 13406 states and 28201 transitions. [2019-11-19 23:30:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-19 23:30:10,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:30:10,045 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:30:10,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:10,248 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:30:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:30:10,248 INFO L82 PathProgramCache]: Analyzing trace with hash 417730973, now seen corresponding path program 37 times [2019-11-19 23:30:10,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:30:10,248 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015660577] [2019-11-19 23:30:10,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:30:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:30:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:30:11,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015660577] [2019-11-19 23:30:11,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750009991] [2019-11-19 23:30:11,044 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:30:11,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-19 23:30:11,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:30:11,159 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:11,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:30:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:30:11,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 23:30:11,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-19 23:30:11,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137101065] [2019-11-19 23:30:11,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-19 23:30:11,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-19 23:30:11,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-19 23:30:11,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=1511, Unknown=0, NotChecked=0, Total=1980 [2019-11-19 23:30:11,185 INFO L87 Difference]: Start difference. First operand 13406 states and 28201 transitions. Second operand 45 states. [2019-11-19 23:30:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:30:13,421 INFO L93 Difference]: Finished difference Result 16745 states and 36166 transitions. [2019-11-19 23:30:13,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-19 23:30:13,422 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 178 [2019-11-19 23:30:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:30:13,434 INFO L225 Difference]: With dead ends: 16745 [2019-11-19 23:30:13,434 INFO L226 Difference]: Without dead ends: 14090 [2019-11-19 23:30:13,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2287, Invalid=5369, Unknown=0, NotChecked=0, Total=7656 [2019-11-19 23:30:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14090 states. [2019-11-19 23:30:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14090 to 13694. [2019-11-19 23:30:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13694 states. [2019-11-19 23:30:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13694 states to 13694 states and 28777 transitions. [2019-11-19 23:30:13,573 INFO L78 Accepts]: Start accepts. Automaton has 13694 states and 28777 transitions. Word has length 178 [2019-11-19 23:30:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:30:13,574 INFO L462 AbstractCegarLoop]: Abstraction has 13694 states and 28777 transitions. [2019-11-19 23:30:13,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-19 23:30:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 13694 states and 28777 transitions. [2019-11-19 23:30:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-19 23:30:13,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:30:13,586 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:30:13,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 23:30:13,790 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-19 23:30:13,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:30:13,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1282774093, now seen corresponding path program 38 times [2019-11-19 23:30:13,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-19 23:30:13,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672230438] [2019-11-19 23:30:13,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-19 23:30:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:30:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 23:30:13,908 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-19 23:30:13,909 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 23:30:14,065 INFO L304 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-11-19 23:30:14,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 11:30:14 BasicIcfg [2019-11-19 23:30:14,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 23:30:14,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 23:30:14,072 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 23:30:14,072 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 23:30:14,072 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:28:56" (3/4) ... [2019-11-19 23:30:14,074 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 23:30:14,218 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d70f632d-6c47-4c99-8248-042031da2a54/bin/uautomizer/witness.graphml [2019-11-19 23:30:14,218 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 23:30:14,220 INFO L168 Benchmark]: Toolchain (without parser) took 79064.82 ms. Allocated memory was 1.0 GB in the beginning and 2.7 GB in the end (delta: 1.6 GB). Free memory was 944.8 MB in the beginning and 1.5 GB in the end (delta: -538.1 MB). Peak memory consumption was 1.1 GB. Max. memory is 11.5 GB. [2019-11-19 23:30:14,220 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:30:14,221 INFO L168 Benchmark]: CACSL2BoogieTranslator took 571.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 190.8 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -223.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-19 23:30:14,221 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-19 23:30:14,221 INFO L168 Benchmark]: Boogie Preprocessor took 39.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 23:30:14,222 INFO L168 Benchmark]: RCFGBuilder took 401.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-19 23:30:14,222 INFO L168 Benchmark]: TraceAbstraction took 77856.27 ms. Allocated memory was 1.2 GB in the beginning and 2.7 GB in the end (delta: 1.4 GB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -387.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 11.5 GB. [2019-11-19 23:30:14,223 INFO L168 Benchmark]: Witness Printer took 146.88 ms. Allocated memory is still 2.7 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 43.5 MB). Peak memory consumption was 43.5 MB. Max. memory is 11.5 GB. [2019-11-19 23:30:14,224 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 571.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 190.8 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -223.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.56 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 39.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 401.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 77856.27 ms. Allocated memory was 1.2 GB in the beginning and 2.7 GB in the end (delta: 1.4 GB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -387.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 11.5 GB. * Witness Printer took 146.88 ms. Allocated memory is still 2.7 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 43.5 MB). Peak memory consumption was 43.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; VAL [i=3, j=6] [L693] 0 pthread_t id1, id2; VAL [i=3, j=6] [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=9] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=10] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=10] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=11] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=12] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=11] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=12] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=12, k=13] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=13] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=14, k=13] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=13, k=14] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=14] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=14] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=15] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=16, k=15] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=15, k=16] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=16] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=16] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=17] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=18, k=17] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=17, k=18] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=18] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=18] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L677] COND TRUE 1 k < 20 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=19] [L685] COND TRUE 2 k < 20 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L697] 0 int condI = i >= (2*20 +6); [L700] 0 int condJ = j >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L702] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=19, k=19] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 101 locations, 1 error locations. Result: UNSAFE, OverallTime: 77.7s, OverallIterations: 44, TraceHistogramMax: 20, AutomataDifference: 41.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 5950 SDtfs, 96422 SDslu, 51692 SDs, 0 SdLazy, 11217 SolverSat, 24966 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5851 GetRequests, 3990 SyntacticMatches, 0 SemanticMatches, 1861 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20429 ImplicationChecksByTransitivity, 34.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13694occurred in iteration=43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.2s AutomataMinimizationTime, 43 MinimizatonAttempts, 64512 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 17.2s InterpolantComputationTime, 8234 NumberOfCodeBlocks, 8234 NumberOfCodeBlocksAsserted, 284 NumberOfCheckSat, 7974 ConstructedInterpolants, 0 QuantifiedInterpolants, 2869510 SizeOfPredicates, 937 NumberOfNonLiveVariables, 9095 ConjunctsInSsa, 1071 ConjunctsInUnsatCore, 82 InterpolantComputations, 4 PerfectInterpolantSequences, 0/36596 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 incorrect! Received shutdown request...