./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ff437623f349039c7c835e26d53647ec95811c37 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-29 22:46:24,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:46:24,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:46:24,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:46:24,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:46:24,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:46:24,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:46:24,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:46:24,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:46:24,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:46:24,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:46:24,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:46:24,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:46:24,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:46:24,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:46:24,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:46:24,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:46:24,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:46:24,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:46:24,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:46:24,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:46:24,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:46:24,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:46:24,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:46:24,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:46:24,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:46:24,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:46:24,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:46:24,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:46:24,941 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:46:24,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:46:24,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:46:24,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:46:24,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:46:24,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:46:24,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:46:24,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:46:24,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:46:24,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:46:24,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:46:24,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:46:24,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:46:24,998 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:46:24,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:46:25,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:46:25,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:46:25,001 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:46:25,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:46:25,002 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:46:25,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:46:25,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:46:25,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:46:25,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:46:25,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:46:25,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:46:25,005 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:46:25,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:46:25,005 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:46:25,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:46:25,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:46:25,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:46:25,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:46:25,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:46:25,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:46:25,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:46:25,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:46:25,007 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:46:25,007 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:46:25,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:46:25,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:46:25,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:46:25,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff437623f349039c7c835e26d53647ec95811c37 [2020-11-29 22:46:25,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:46:25,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:46:25,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:46:25,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:46:25,301 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:46:25,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-2.i [2020-11-29 22:46:25,398 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/data/683a15d7a/f541d19be4844ecdafa3a59b7c8da9c6/FLAG1a5926738 [2020-11-29 22:46:26,072 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:46:26,073 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/sv-benchmarks/c/pthread/triangular-longer-2.i [2020-11-29 22:46:26,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/data/683a15d7a/f541d19be4844ecdafa3a59b7c8da9c6/FLAG1a5926738 [2020-11-29 22:46:26,337 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/data/683a15d7a/f541d19be4844ecdafa3a59b7c8da9c6 [2020-11-29 22:46:26,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:46:26,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:46:26,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:46:26,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:46:26,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:46:26,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:46:26" (1/1) ... [2020-11-29 22:46:26,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@944b7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:26, skipping insertion in model container [2020-11-29 22:46:26,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:46:26" (1/1) ... [2020-11-29 22:46:26,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:46:26,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:46:26,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:46:27,007 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:46:27,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:46:27,180 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:46:27,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27 WrapperNode [2020-11-29 22:46:27,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:46:27,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:46:27,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:46:27,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:46:27,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,232 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:46:27,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:46:27,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:46:27,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:46:27,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... [2020-11-29 22:46:27,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:46:27,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:46:27,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:46:27,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:46:27,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:27,356 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-29 22:46:27,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-29 22:46:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-29 22:46:27,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-29 22:46:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 22:46:27,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-29 22:46:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:46:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 22:46:27,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:46:27,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-29 22:46:27,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:46:27,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:46:27,363 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-29 22:46:27,909 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:46:27,910 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-29 22:46:27,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:46:27 BoogieIcfgContainer [2020-11-29 22:46:27,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:46:27,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:46:27,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:46:27,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:46:27,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:46:26" (1/3) ... [2020-11-29 22:46:27,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5101dc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:46:27, skipping insertion in model container [2020-11-29 22:46:27,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:46:27" (2/3) ... [2020-11-29 22:46:27,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5101dc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:46:27, skipping insertion in model container [2020-11-29 22:46:27,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:46:27" (3/3) ... [2020-11-29 22:46:27,921 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-11-29 22:46:27,932 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-29 22:46:27,932 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:46:27,936 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:46:27,937 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-29 22:46:27,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,978 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,978 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,978 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,979 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,979 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,980 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,980 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,980 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,981 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,981 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,981 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,981 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,982 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,982 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,984 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,984 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,984 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,985 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,985 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,986 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,986 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,986 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,986 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,986 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,987 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,987 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,989 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,989 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,989 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,989 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,990 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,990 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,994 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,995 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,995 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-29 22:46:27,997 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-29 22:46:28,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-29 22:46:28,028 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:46:28,028 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:46:28,028 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:46:28,029 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:46:28,029 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:46:28,029 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:46:28,029 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:46:28,029 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:46:28,039 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-29 22:46:28,041 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-29 22:46:28,044 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-29 22:46:28,046 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-29 22:46:28,108 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-29 22:46:28,109 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-29 22:46:28,115 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-29 22:46:28,119 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-29 22:46:29,722 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-29 22:46:30,139 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-11-29 22:46:30,287 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-29 22:46:30,314 INFO L131 LiptonReduction]: Checked pairs total: 1062 [2020-11-29 22:46:30,314 INFO L133 LiptonReduction]: Total number of compositions: 60 [2020-11-29 22:46:30,321 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-29 22:46:30,331 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-29 22:46:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-29 22:46:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 22:46:30,338 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:30,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 22:46:30,339 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:30,345 INFO L82 PathProgramCache]: Analyzing trace with hash -720017533, now seen corresponding path program 1 times [2020-11-29 22:46:30,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:30,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045653973] [2020-11-29 22:46:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:30,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045653973] [2020-11-29 22:46:30,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:30,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:46:30,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015911672] [2020-11-29 22:46:30,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 22:46:30,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:30,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:46:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:46:30,655 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-29 22:46:30,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:30,736 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-29 22:46:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:46:30,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-29 22:46:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:30,749 INFO L225 Difference]: With dead ends: 75 [2020-11-29 22:46:30,750 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 22:46:30,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:46:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 22:46:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 22:46:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 22:46:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-29 22:46:30,792 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-29 22:46:30,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:30,792 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-29 22:46:30,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 22:46:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-29 22:46:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 22:46:30,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:30,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:30,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:46:30,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -447013893, now seen corresponding path program 1 times [2020-11-29 22:46:30,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:30,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801988398] [2020-11-29 22:46:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:30,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801988398] [2020-11-29 22:46:30,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:30,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:46:30,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284739907] [2020-11-29 22:46:30,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:46:30,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:46:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:46:30,952 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-29 22:46:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:31,007 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-29 22:46:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:46:31,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-29 22:46:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:31,010 INFO L225 Difference]: With dead ends: 56 [2020-11-29 22:46:31,010 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 22:46:31,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:46:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 22:46:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-29 22:46:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 22:46:31,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-29 22:46:31,025 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-29 22:46:31,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:31,026 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-29 22:46:31,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:46:31,026 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-29 22:46:31,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 22:46:31,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:31,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:31,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:46:31,028 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash -190894617, now seen corresponding path program 1 times [2020-11-29 22:46:31,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:31,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727782618] [2020-11-29 22:46:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:31,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727782618] [2020-11-29 22:46:31,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:31,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:31,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341521800] [2020-11-29 22:46:31,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:46:31,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:46:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:46:31,150 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-11-29 22:46:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:31,263 INFO L93 Difference]: Finished difference Result 54 states and 124 transitions. [2020-11-29 22:46:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:46:31,264 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 22:46:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:31,265 INFO L225 Difference]: With dead ends: 54 [2020-11-29 22:46:31,265 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 22:46:31,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:46:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 22:46:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-11-29 22:46:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 22:46:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 106 transitions. [2020-11-29 22:46:31,279 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 106 transitions. Word has length 10 [2020-11-29 22:46:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:31,280 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 106 transitions. [2020-11-29 22:46:31,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:46:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 106 transitions. [2020-11-29 22:46:31,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 22:46:31,282 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:31,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:31,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 22:46:31,283 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash -83647017, now seen corresponding path program 2 times [2020-11-29 22:46:31,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:31,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446116704] [2020-11-29 22:46:31,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:31,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446116704] [2020-11-29 22:46:31,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:31,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:31,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852743929] [2020-11-29 22:46:31,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:46:31,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:46:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:46:31,433 INFO L87 Difference]: Start difference. First operand 45 states and 106 transitions. Second operand 6 states. [2020-11-29 22:46:31,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:31,545 INFO L93 Difference]: Finished difference Result 84 states and 192 transitions. [2020-11-29 22:46:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:46:31,547 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 22:46:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:31,549 INFO L225 Difference]: With dead ends: 84 [2020-11-29 22:46:31,549 INFO L226 Difference]: Without dead ends: 77 [2020-11-29 22:46:31,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:46:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-29 22:46:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-11-29 22:46:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 22:46:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-29 22:46:31,565 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 10 [2020-11-29 22:46:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:31,565 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-29 22:46:31,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:46:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-29 22:46:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 22:46:31,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:31,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:31,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 22:46:31,568 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:31,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash -83970657, now seen corresponding path program 3 times [2020-11-29 22:46:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:31,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558030355] [2020-11-29 22:46:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:31,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558030355] [2020-11-29 22:46:31,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:31,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:31,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2320468] [2020-11-29 22:46:31,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:46:31,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:46:31,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:46:31,663 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 6 states. [2020-11-29 22:46:31,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:31,798 INFO L93 Difference]: Finished difference Result 61 states and 139 transitions. [2020-11-29 22:46:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:46:31,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 22:46:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:31,800 INFO L225 Difference]: With dead ends: 61 [2020-11-29 22:46:31,800 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 22:46:31,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:46:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 22:46:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-29 22:46:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 22:46:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 96 transitions. [2020-11-29 22:46:31,807 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 96 transitions. Word has length 10 [2020-11-29 22:46:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:31,808 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 96 transitions. [2020-11-29 22:46:31,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:46:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 96 transitions. [2020-11-29 22:46:31,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 22:46:31,809 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:31,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:31,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 22:46:31,809 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:31,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:31,810 INFO L82 PathProgramCache]: Analyzing trace with hash -118912617, now seen corresponding path program 4 times [2020-11-29 22:46:31,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:31,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016237567] [2020-11-29 22:46:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:31,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016237567] [2020-11-29 22:46:31,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:46:31,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 22:46:31,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844460503] [2020-11-29 22:46:31,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:46:31,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:31,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:46:31,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:46:31,887 INFO L87 Difference]: Start difference. First operand 40 states and 96 transitions. Second operand 6 states. [2020-11-29 22:46:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:31,972 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-11-29 22:46:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:46:31,973 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-29 22:46:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:31,974 INFO L225 Difference]: With dead ends: 55 [2020-11-29 22:46:31,974 INFO L226 Difference]: Without dead ends: 49 [2020-11-29 22:46:31,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:46:31,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-29 22:46:31,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-11-29 22:46:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 22:46:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 99 transitions. [2020-11-29 22:46:31,981 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 99 transitions. Word has length 10 [2020-11-29 22:46:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:31,981 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 99 transitions. [2020-11-29 22:46:31,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:46:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 99 transitions. [2020-11-29 22:46:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:46:31,982 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:31,983 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:31,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 22:46:31,983 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:31,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:31,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1691902418, now seen corresponding path program 5 times [2020-11-29 22:46:31,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:31,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122962519] [2020-11-29 22:46:31,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:32,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122962519] [2020-11-29 22:46:32,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033145453] [2020-11-29 22:46:32,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:32,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:46:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:32,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:46:32,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:32,425 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-11-29 22:46:32,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:32,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:32,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 22:46:32,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816442712] [2020-11-29 22:46:32,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:46:32,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:32,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:46:32,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:46:32,463 INFO L87 Difference]: Start difference. First operand 41 states and 99 transitions. Second operand 8 states. [2020-11-29 22:46:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:32,609 INFO L93 Difference]: Finished difference Result 55 states and 131 transitions. [2020-11-29 22:46:32,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:46:32,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-29 22:46:32,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:32,611 INFO L225 Difference]: With dead ends: 55 [2020-11-29 22:46:32,612 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 22:46:32,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:46:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 22:46:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2020-11-29 22:46:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-29 22:46:32,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-29 22:46:32,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-11-29 22:46:32,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:32,617 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-29 22:46:32,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:46:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-29 22:46:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:46:32,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:32,618 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:32,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-29 22:46:32,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:32,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:32,820 INFO L82 PathProgramCache]: Analyzing trace with hash 608698775, now seen corresponding path program 6 times [2020-11-29 22:46:32,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:32,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733389976] [2020-11-29 22:46:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733389976] [2020-11-29 22:46:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293549268] [2020-11-29 22:46:32,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:33,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-29 22:46:33,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:46:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:33,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:46:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:33,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:33,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 22:46:33,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818149261] [2020-11-29 22:46:33,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:46:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:33,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:46:33,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:46:33,094 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-11-29 22:46:33,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:33,367 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-29 22:46:33,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:46:33,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-29 22:46:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:33,369 INFO L225 Difference]: With dead ends: 64 [2020-11-29 22:46:33,369 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 22:46:33,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:46:33,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 22:46:33,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2020-11-29 22:46:33,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 22:46:33,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-29 22:46:33,375 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-29 22:46:33,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:33,376 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-29 22:46:33,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:46:33,376 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-29 22:46:33,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 22:46:33,377 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:33,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:33,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:33,591 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1233878826, now seen corresponding path program 7 times [2020-11-29 22:46:33,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:33,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479529935] [2020-11-29 22:46:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:33,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:33,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479529935] [2020-11-29 22:46:33,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491504678] [2020-11-29 22:46:33,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:33,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:33,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:46:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:33,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:33,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:33,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 22:46:33,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130329204] [2020-11-29 22:46:33,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:46:33,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:46:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:46:33,877 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-11-29 22:46:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:34,039 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-29 22:46:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:46:34,040 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-29 22:46:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:34,041 INFO L225 Difference]: With dead ends: 56 [2020-11-29 22:46:34,041 INFO L226 Difference]: Without dead ends: 50 [2020-11-29 22:46:34,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:46:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-29 22:46:34,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-11-29 22:46:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 22:46:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-29 22:46:34,046 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-29 22:46:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:34,046 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-29 22:46:34,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:46:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-29 22:46:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 22:46:34,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:34,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:34,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:34,262 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:34,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1219607322, now seen corresponding path program 8 times [2020-11-29 22:46:34,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:34,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200624056] [2020-11-29 22:46:34,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:34,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200624056] [2020-11-29 22:46:34,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566962282] [2020-11-29 22:46:34,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:34,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:46:34,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 22:46:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:34,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:34,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 22:46:34,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858855683] [2020-11-29 22:46:34,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:46:34,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:34,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:46:34,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:46:34,517 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2020-11-29 22:46:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:34,657 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2020-11-29 22:46:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:46:34,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-29 22:46:34,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:34,659 INFO L225 Difference]: With dead ends: 72 [2020-11-29 22:46:34,660 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 22:46:34,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:46:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 22:46:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-11-29 22:46:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-29 22:46:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-29 22:46:34,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-11-29 22:46:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:34,665 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-29 22:46:34,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:46:34,665 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-29 22:46:34,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 22:46:34,670 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:34,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:34,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:34,888 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:34,888 INFO L82 PathProgramCache]: Analyzing trace with hash 909390012, now seen corresponding path program 9 times [2020-11-29 22:46:34,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:34,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575589146] [2020-11-29 22:46:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:34,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575589146] [2020-11-29 22:46:34,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792895666] [2020-11-29 22:46:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:35,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 22:46:35,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:35,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:46:35,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:35,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:35,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 22:46:35,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701896691] [2020-11-29 22:46:35,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:46:35,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:46:35,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:46:35,112 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 9 states. [2020-11-29 22:46:35,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:35,372 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-11-29 22:46:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:46:35,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-29 22:46:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:35,375 INFO L225 Difference]: With dead ends: 68 [2020-11-29 22:46:35,375 INFO L226 Difference]: Without dead ends: 59 [2020-11-29 22:46:35,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:46:35,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-29 22:46:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 43. [2020-11-29 22:46:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 22:46:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-11-29 22:46:35,380 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 12 [2020-11-29 22:46:35,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:35,380 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-11-29 22:46:35,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:46:35,380 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-11-29 22:46:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-29 22:46:35,381 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:35,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:35,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-11-29 22:46:35,582 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:35,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1689818330, now seen corresponding path program 10 times [2020-11-29 22:46:35,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:35,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371360877] [2020-11-29 22:46:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:35,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:35,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371360877] [2020-11-29 22:46:35,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685788297] [2020-11-29 22:46:35,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:35,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:46:35,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:35,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 22:46:35,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:35,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:35,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:35,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 22:46:35,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839037532] [2020-11-29 22:46:35,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:46:35,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:35,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:46:35,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:46:35,839 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-11-29 22:46:36,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:36,123 INFO L93 Difference]: Finished difference Result 63 states and 149 transitions. [2020-11-29 22:46:36,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:46:36,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-29 22:46:36,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:36,125 INFO L225 Difference]: With dead ends: 63 [2020-11-29 22:46:36,125 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 22:46:36,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:46:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 22:46:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-11-29 22:46:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 22:46:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-11-29 22:46:36,129 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 12 [2020-11-29 22:46:36,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:36,130 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-11-29 22:46:36,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:46:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-11-29 22:46:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:46:36,130 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:36,131 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:36,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:36,346 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:36,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1873655211, now seen corresponding path program 11 times [2020-11-29 22:46:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:36,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843294433] [2020-11-29 22:46:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:36,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843294433] [2020-11-29 22:46:36,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3875648] [2020-11-29 22:46:36,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:36,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-29 22:46:36,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:46:36,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:36,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:36,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:36,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 22:46:36,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962861756] [2020-11-29 22:46:36,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 22:46:36,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:36,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:46:36,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:46:36,587 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-11-29 22:46:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:36,883 INFO L93 Difference]: Finished difference Result 63 states and 151 transitions. [2020-11-29 22:46:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:46:36,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-29 22:46:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:36,885 INFO L225 Difference]: With dead ends: 63 [2020-11-29 22:46:36,885 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 22:46:36,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-29 22:46:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 22:46:36,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-11-29 22:46:36,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 22:46:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-11-29 22:46:36,890 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-11-29 22:46:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:36,890 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-11-29 22:46:36,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 22:46:36,890 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-11-29 22:46:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:46:36,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:36,891 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:37,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:37,092 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:37,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:37,092 INFO L82 PathProgramCache]: Analyzing trace with hash 844783284, now seen corresponding path program 12 times [2020-11-29 22:46:37,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:37,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931751681] [2020-11-29 22:46:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:37,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931751681] [2020-11-29 22:46:37,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061056874] [2020-11-29 22:46:37,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:37,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-29 22:46:37,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:37,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:46:37,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:37,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:37,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 22:46:37,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225038111] [2020-11-29 22:46:37,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 22:46:37,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:46:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:46:37,405 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 10 states. [2020-11-29 22:46:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:37,738 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-29 22:46:37,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:46:37,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-29 22:46:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:37,740 INFO L225 Difference]: With dead ends: 73 [2020-11-29 22:46:37,740 INFO L226 Difference]: Without dead ends: 64 [2020-11-29 22:46:37,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-11-29 22:46:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-29 22:46:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2020-11-29 22:46:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 22:46:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-29 22:46:37,744 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-29 22:46:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:37,744 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-29 22:46:37,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 22:46:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-29 22:46:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:46:37,745 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:37,745 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:37,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-29 22:46:37,946 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash 346590125, now seen corresponding path program 13 times [2020-11-29 22:46:37,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:37,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804738419] [2020-11-29 22:46:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:38,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804738419] [2020-11-29 22:46:38,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744533751] [2020-11-29 22:46:38,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:46:38,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:38,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:38,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:38,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 22:46:38,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090321528] [2020-11-29 22:46:38,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 22:46:38,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:38,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:46:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:46:38,193 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-11-29 22:46:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:38,442 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-29 22:46:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:46:38,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-29 22:46:38,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:38,444 INFO L225 Difference]: With dead ends: 64 [2020-11-29 22:46:38,444 INFO L226 Difference]: Without dead ends: 58 [2020-11-29 22:46:38,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:46:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-29 22:46:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-11-29 22:46:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 22:46:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 22:46:38,448 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-29 22:46:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:38,448 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 22:46:38,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 22:46:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 22:46:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:46:38,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:38,449 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:38,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 22:46:38,672 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash -483423331, now seen corresponding path program 14 times [2020-11-29 22:46:38,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:38,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665752987] [2020-11-29 22:46:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:38,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665752987] [2020-11-29 22:46:38,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526904930] [2020-11-29 22:46:38,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:38,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:46:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:46:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:38,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:38,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 22:46:38,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728775652] [2020-11-29 22:46:38,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-29 22:46:38,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:38,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:46:38,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:46:38,899 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2020-11-29 22:46:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:39,047 INFO L93 Difference]: Finished difference Result 84 states and 191 transitions. [2020-11-29 22:46:39,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:46:39,048 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-29 22:46:39,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:39,048 INFO L225 Difference]: With dead ends: 84 [2020-11-29 22:46:39,048 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 22:46:39,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:46:39,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 22:46:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 52. [2020-11-29 22:46:39,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 22:46:39,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 22:46:39,053 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 14 [2020-11-29 22:46:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:39,053 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 22:46:39,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-29 22:46:39,053 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 22:46:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:46:39,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:39,054 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:39,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 22:46:39,264 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:39,264 INFO L82 PathProgramCache]: Analyzing trace with hash 2046253209, now seen corresponding path program 15 times [2020-11-29 22:46:39,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:39,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450050064] [2020-11-29 22:46:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:39,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450050064] [2020-11-29 22:46:39,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788883674] [2020-11-29 22:46:39,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:39,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 22:46:39,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:46:39,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:39,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:39,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 22:46:39,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708557654] [2020-11-29 22:46:39,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 22:46:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:39,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:46:39,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:46:39,510 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 11 states. [2020-11-29 22:46:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:39,851 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-11-29 22:46:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:46:39,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-29 22:46:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:39,853 INFO L225 Difference]: With dead ends: 78 [2020-11-29 22:46:39,853 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 22:46:39,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:46:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 22:46:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2020-11-29 22:46:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-29 22:46:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-29 22:46:39,857 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2020-11-29 22:46:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:39,857 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-29 22:46:39,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 22:46:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-29 22:46:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:46:39,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:39,858 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:40,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 22:46:40,059 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:40,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:40,059 INFO L82 PathProgramCache]: Analyzing trace with hash 418503517, now seen corresponding path program 16 times [2020-11-29 22:46:40,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:40,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483615751] [2020-11-29 22:46:40,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:40,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483615751] [2020-11-29 22:46:40,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411528313] [2020-11-29 22:46:40,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:40,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:46:40,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:40,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:46:40,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:40,239 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:40,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:40,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 22:46:40,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321844210] [2020-11-29 22:46:40,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 22:46:40,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:46:40,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:46:40,257 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 11 states. [2020-11-29 22:46:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:40,565 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-11-29 22:46:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 22:46:40,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-29 22:46:40,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:40,566 INFO L225 Difference]: With dead ends: 73 [2020-11-29 22:46:40,566 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 22:46:40,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-29 22:46:40,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 22:46:40,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2020-11-29 22:46:40,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-29 22:46:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-11-29 22:46:40,571 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 14 [2020-11-29 22:46:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:40,571 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-11-29 22:46:40,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 22:46:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-11-29 22:46:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 22:46:40,572 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:40,572 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:40,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 22:46:40,773 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:40,773 INFO L82 PathProgramCache]: Analyzing trace with hash -990634472, now seen corresponding path program 17 times [2020-11-29 22:46:40,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:40,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804142612] [2020-11-29 22:46:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:40,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804142612] [2020-11-29 22:46:40,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563005525] [2020-11-29 22:46:40,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:40,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-29 22:46:40,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:46:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:40,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:40,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:40,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 22:46:40,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187017356] [2020-11-29 22:46:40,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 22:46:40,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:46:40,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:46:40,985 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-11-29 22:46:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:41,347 INFO L93 Difference]: Finished difference Result 71 states and 171 transitions. [2020-11-29 22:46:41,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 22:46:41,348 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-29 22:46:41,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:41,349 INFO L225 Difference]: With dead ends: 71 [2020-11-29 22:46:41,349 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 22:46:41,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-29 22:46:41,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 22:46:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-11-29 22:46:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 22:46:41,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-29 22:46:41,354 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-11-29 22:46:41,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:41,354 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-29 22:46:41,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 22:46:41,355 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-29 22:46:41,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 22:46:41,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:41,355 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:41,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:41,568 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash 88729745, now seen corresponding path program 18 times [2020-11-29 22:46:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:41,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186338077] [2020-11-29 22:46:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:41,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186338077] [2020-11-29 22:46:41,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475493666] [2020-11-29 22:46:41,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:41,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-29 22:46:41,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:46:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:41,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:41,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 22:46:41,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645985918] [2020-11-29 22:46:41,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 22:46:41,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:41,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:46:41,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:46:41,827 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 12 states. [2020-11-29 22:46:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:42,199 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-29 22:46:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 22:46:42,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-29 22:46:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:42,200 INFO L225 Difference]: With dead ends: 83 [2020-11-29 22:46:42,200 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 22:46:42,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-11-29 22:46:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 22:46:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-11-29 22:46:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 22:46:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-29 22:46:42,205 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-29 22:46:42,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:42,205 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-29 22:46:42,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 22:46:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-29 22:46:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 22:46:42,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:42,206 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:42,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:42,416 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1934326928, now seen corresponding path program 19 times [2020-11-29 22:46:42,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:42,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921025981] [2020-11-29 22:46:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:42,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921025981] [2020-11-29 22:46:42,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304553706] [2020-11-29 22:46:42,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:42,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:46:42,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:42,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:42,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:42,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 22:46:42,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115843222] [2020-11-29 22:46:42,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 22:46:42,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:42,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:46:42,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:46:42,736 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-11-29 22:46:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:42,992 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-29 22:46:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 22:46:42,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-29 22:46:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:42,993 INFO L225 Difference]: With dead ends: 72 [2020-11-29 22:46:42,993 INFO L226 Difference]: Without dead ends: 66 [2020-11-29 22:46:42,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-11-29 22:46:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-29 22:46:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-29 22:46:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 22:46:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-29 22:46:42,997 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-29 22:46:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:42,997 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-29 22:46:42,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 22:46:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-29 22:46:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 22:46:42,998 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:42,998 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:43,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-29 22:46:43,199 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:43,199 INFO L82 PathProgramCache]: Analyzing trace with hash -713341088, now seen corresponding path program 20 times [2020-11-29 22:46:43,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:43,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102378772] [2020-11-29 22:46:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:43,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102378772] [2020-11-29 22:46:43,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014170235] [2020-11-29 22:46:43,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:43,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:46:43,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:43,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:46:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:43,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:43,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 22:46:43,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143486492] [2020-11-29 22:46:43,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 22:46:43,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:46:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:46:43,434 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 12 states. [2020-11-29 22:46:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:43,639 INFO L93 Difference]: Finished difference Result 96 states and 219 transitions. [2020-11-29 22:46:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 22:46:43,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-29 22:46:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:43,640 INFO L225 Difference]: With dead ends: 96 [2020-11-29 22:46:43,640 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 22:46:43,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-11-29 22:46:43,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 22:46:43,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-11-29 22:46:43,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 22:46:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-11-29 22:46:43,644 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 16 [2020-11-29 22:46:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:43,644 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-11-29 22:46:43,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 22:46:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-11-29 22:46:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 22:46:43,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:43,645 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:43,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:43,864 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:43,864 INFO L82 PathProgramCache]: Analyzing trace with hash -644874954, now seen corresponding path program 21 times [2020-11-29 22:46:43,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:43,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605902897] [2020-11-29 22:46:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:44,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605902897] [2020-11-29 22:46:44,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465451619] [2020-11-29 22:46:44,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:44,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 22:46:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:46:44,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:44,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:44,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 22:46:44,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280501128] [2020-11-29 22:46:44,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 22:46:44,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:44,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 22:46:44,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:46:44,120 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 13 states. [2020-11-29 22:46:44,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:44,467 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-11-29 22:46:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 22:46:44,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-29 22:46:44,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:44,468 INFO L225 Difference]: With dead ends: 88 [2020-11-29 22:46:44,468 INFO L226 Difference]: Without dead ends: 79 [2020-11-29 22:46:44,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-11-29 22:46:44,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-29 22:46:44,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2020-11-29 22:46:44,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-29 22:46:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 123 transitions. [2020-11-29 22:46:44,472 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 123 transitions. Word has length 16 [2020-11-29 22:46:44,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:44,472 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 123 transitions. [2020-11-29 22:46:44,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 22:46:44,472 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 123 transitions. [2020-11-29 22:46:44,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 22:46:44,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:44,473 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:44,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-29 22:46:44,673 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1544319712, now seen corresponding path program 22 times [2020-11-29 22:46:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:44,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356082600] [2020-11-29 22:46:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:44,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356082600] [2020-11-29 22:46:44,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626377423] [2020-11-29 22:46:44,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:44,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:46:44,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:46:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:44,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:44,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:44,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-29 22:46:44,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29263742] [2020-11-29 22:46:44,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-29 22:46:44,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-29 22:46:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:46:44,926 INFO L87 Difference]: Start difference. First operand 51 states and 123 transitions. Second operand 13 states. [2020-11-29 22:46:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:45,334 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-11-29 22:46:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 22:46:45,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-29 22:46:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:45,336 INFO L225 Difference]: With dead ends: 83 [2020-11-29 22:46:45,336 INFO L226 Difference]: Without dead ends: 78 [2020-11-29 22:46:45,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-29 22:46:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-29 22:46:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2020-11-29 22:46:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 22:46:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-11-29 22:46:45,339 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 16 [2020-11-29 22:46:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:45,340 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-11-29 22:46:45,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-29 22:46:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-11-29 22:46:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:46:45,340 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:45,340 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:45,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-29 22:46:45,541 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1483738395, now seen corresponding path program 23 times [2020-11-29 22:46:45,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:45,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608605570] [2020-11-29 22:46:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:45,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608605570] [2020-11-29 22:46:45,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400353019] [2020-11-29 22:46:45,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:45,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-29 22:46:45,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:46:45,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:45,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:45,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:45,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 22:46:45,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315067281] [2020-11-29 22:46:45,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:46:45,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:46:45,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:46:45,765 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-11-29 22:46:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:46,218 INFO L93 Difference]: Finished difference Result 79 states and 191 transitions. [2020-11-29 22:46:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 22:46:46,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-29 22:46:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:46,219 INFO L225 Difference]: With dead ends: 79 [2020-11-29 22:46:46,219 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 22:46:46,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-29 22:46:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 22:46:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-11-29 22:46:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-29 22:46:46,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-11-29 22:46:46,222 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-11-29 22:46:46,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:46,222 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-11-29 22:46:46,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:46:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-11-29 22:46:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 22:46:46,223 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:46,223 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:46,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-29 22:46:46,439 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash -629248210, now seen corresponding path program 24 times [2020-11-29 22:46:46,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:46,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615110209] [2020-11-29 22:46:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:46,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615110209] [2020-11-29 22:46:46,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086963250] [2020-11-29 22:46:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:46,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-29 22:46:46,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:46:46,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:46,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:46:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:46,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:46,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-29 22:46:46,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290277332] [2020-11-29 22:46:46,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:46:46,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:46:46,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:46:46,641 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 14 states. [2020-11-29 22:46:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:47,131 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-29 22:46:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 22:46:47,131 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-29 22:46:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:47,132 INFO L225 Difference]: With dead ends: 93 [2020-11-29 22:46:47,132 INFO L226 Difference]: Without dead ends: 84 [2020-11-29 22:46:47,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 22:46:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-29 22:46:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-11-29 22:46:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-29 22:46:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-29 22:46:47,135 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-29 22:46:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:47,136 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-29 22:46:47,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:46:47,136 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-29 22:46:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 22:46:47,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:47,136 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:47,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-29 22:46:47,348 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash 832673395, now seen corresponding path program 25 times [2020-11-29 22:46:47,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:47,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705614380] [2020-11-29 22:46:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:47,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705614380] [2020-11-29 22:46:47,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599216196] [2020-11-29 22:46:47,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:47,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 22:46:47,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:47,635 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:47,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:47,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 22:46:47,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113775537] [2020-11-29 22:46:47,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:46:47,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:47,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:46:47,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:46:47,669 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-11-29 22:46:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:47,970 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-29 22:46:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:46:47,971 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-29 22:46:47,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:47,971 INFO L225 Difference]: With dead ends: 80 [2020-11-29 22:46:47,972 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 22:46:47,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-11-29 22:46:47,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 22:46:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2020-11-29 22:46:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:46:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-29 22:46:47,974 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-29 22:46:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:47,974 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-29 22:46:47,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:46:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-29 22:46:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 22:46:47,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:47,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:48,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-29 22:46:48,175 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1673993827, now seen corresponding path program 26 times [2020-11-29 22:46:48,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:48,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506918881] [2020-11-29 22:46:48,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:48,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506918881] [2020-11-29 22:46:48,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322245748] [2020-11-29 22:46:48,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:48,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:46:48,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:48,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 22:46:48,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:48,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:48,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 22:46:48,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852138607] [2020-11-29 22:46:48,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-29 22:46:48,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:48,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 22:46:48,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-29 22:46:48,492 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 14 states. [2020-11-29 22:46:48,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:48,716 INFO L93 Difference]: Finished difference Result 108 states and 247 transitions. [2020-11-29 22:46:48,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-29 22:46:48,719 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-29 22:46:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:48,720 INFO L225 Difference]: With dead ends: 108 [2020-11-29 22:46:48,720 INFO L226 Difference]: Without dead ends: 102 [2020-11-29 22:46:48,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-11-29 22:46:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-11-29 22:46:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 64. [2020-11-29 22:46:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:46:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-11-29 22:46:48,724 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-11-29 22:46:48,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:48,724 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-11-29 22:46:48,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-29 22:46:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-11-29 22:46:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 22:46:48,725 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:48,725 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:48,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:48,948 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1248727405, now seen corresponding path program 27 times [2020-11-29 22:46:48,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:48,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195231137] [2020-11-29 22:46:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:49,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195231137] [2020-11-29 22:46:49,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614546482] [2020-11-29 22:46:49,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:49,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 22:46:49,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:49,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 22:46:49,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:49,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:49,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 22:46:49,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94945020] [2020-11-29 22:46:49,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 22:46:49,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 22:46:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:46:49,209 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-11-29 22:46:49,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:49,699 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-11-29 22:46:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 22:46:49,702 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-29 22:46:49,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:49,703 INFO L225 Difference]: With dead ends: 98 [2020-11-29 22:46:49,703 INFO L226 Difference]: Without dead ends: 89 [2020-11-29 22:46:49,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-11-29 22:46:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-29 22:46:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 55. [2020-11-29 22:46:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 22:46:49,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 133 transitions. [2020-11-29 22:46:49,707 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 133 transitions. Word has length 18 [2020-11-29 22:46:49,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:49,707 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 133 transitions. [2020-11-29 22:46:49,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 22:46:49,707 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 133 transitions. [2020-11-29 22:46:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 22:46:49,707 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:49,708 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:49,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-29 22:46:49,908 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:49,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1968167459, now seen corresponding path program 28 times [2020-11-29 22:46:49,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:49,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036354258] [2020-11-29 22:46:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:50,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036354258] [2020-11-29 22:46:50,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267537910] [2020-11-29 22:46:50,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:50,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:46:50,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 22:46:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:50,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:50,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:50,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-29 22:46:50,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725801939] [2020-11-29 22:46:50,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-29 22:46:50,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:50,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 22:46:50,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-29 22:46:50,200 INFO L87 Difference]: Start difference. First operand 55 states and 133 transitions. Second operand 15 states. [2020-11-29 22:46:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:50,840 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-11-29 22:46:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 22:46:50,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-29 22:46:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:50,842 INFO L225 Difference]: With dead ends: 93 [2020-11-29 22:46:50,842 INFO L226 Difference]: Without dead ends: 88 [2020-11-29 22:46:50,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-29 22:46:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-29 22:46:50,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2020-11-29 22:46:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-29 22:46:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-11-29 22:46:50,846 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 18 [2020-11-29 22:46:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:50,846 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-11-29 22:46:50,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-29 22:46:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-11-29 22:46:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 22:46:50,847 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:50,847 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:51,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:51,047 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:51,048 INFO L82 PathProgramCache]: Analyzing trace with hash -55818402, now seen corresponding path program 29 times [2020-11-29 22:46:51,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:51,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25619345] [2020-11-29 22:46:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:51,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25619345] [2020-11-29 22:46:51,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891844172] [2020-11-29 22:46:51,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:51,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 22:46:51,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:51,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 22:46:51,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:51,291 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:51,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:51,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 22:46:51,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534676115] [2020-11-29 22:46:51,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 22:46:51,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:51,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 22:46:51,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:46:51,311 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-11-29 22:46:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:51,813 INFO L93 Difference]: Finished difference Result 87 states and 211 transitions. [2020-11-29 22:46:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 22:46:51,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-29 22:46:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:51,826 INFO L225 Difference]: With dead ends: 87 [2020-11-29 22:46:51,826 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 22:46:51,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 22:46:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 22:46:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2020-11-29 22:46:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 22:46:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-11-29 22:46:51,829 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-11-29 22:46:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:51,830 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-11-29 22:46:51,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 22:46:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-11-29 22:46:51,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 22:46:51,830 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:51,830 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:52,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-29 22:46:52,038 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:52,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:52,038 INFO L82 PathProgramCache]: Analyzing trace with hash 883671691, now seen corresponding path program 30 times [2020-11-29 22:46:52,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:52,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192130143] [2020-11-29 22:46:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192130143] [2020-11-29 22:46:52,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102811938] [2020-11-29 22:46:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:52,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-29 22:46:52,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:52,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 22:46:52,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:52,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:46:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:52,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:52,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-29 22:46:52,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298084182] [2020-11-29 22:46:52,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 22:46:52,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 22:46:52,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:46:52,468 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 16 states. [2020-11-29 22:46:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:53,114 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-29 22:46:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 22:46:53,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-29 22:46:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:53,116 INFO L225 Difference]: With dead ends: 103 [2020-11-29 22:46:53,116 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 22:46:53,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-11-29 22:46:53,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 22:46:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-11-29 22:46:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 22:46:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-29 22:46:53,119 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-29 22:46:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:53,120 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-29 22:46:53,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 22:46:53,120 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-29 22:46:53,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:46:53,120 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:53,120 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:53,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:53,339 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1335227574, now seen corresponding path program 31 times [2020-11-29 22:46:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:53,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809764321] [2020-11-29 22:46:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:53,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809764321] [2020-11-29 22:46:53,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037893162] [2020-11-29 22:46:53,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 22:46:53,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:53,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:53,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:53,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-29 22:46:53,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877967531] [2020-11-29 22:46:53,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 22:46:53,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:53,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 22:46:53,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:46:53,688 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-11-29 22:46:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:54,040 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-29 22:46:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 22:46:54,041 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-29 22:46:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:54,042 INFO L225 Difference]: With dead ends: 88 [2020-11-29 22:46:54,042 INFO L226 Difference]: Without dead ends: 82 [2020-11-29 22:46:54,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2020-11-29 22:46:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-29 22:46:54,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 70. [2020-11-29 22:46:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 22:46:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-29 22:46:54,046 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-29 22:46:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:54,046 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-29 22:46:54,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 22:46:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-29 22:46:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:46:54,047 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:54,047 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:54,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-29 22:46:54,259 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1904656218, now seen corresponding path program 32 times [2020-11-29 22:46:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:54,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358499515] [2020-11-29 22:46:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:54,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358499515] [2020-11-29 22:46:54,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84098014] [2020-11-29 22:46:54,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:54,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:46:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 22:46:54,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:54,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:54,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-29 22:46:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049492135] [2020-11-29 22:46:54,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 22:46:54,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 22:46:54,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:46:54,634 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 16 states. [2020-11-29 22:46:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:54,976 INFO L93 Difference]: Finished difference Result 120 states and 275 transitions. [2020-11-29 22:46:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 22:46:54,977 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-29 22:46:54,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:54,978 INFO L225 Difference]: With dead ends: 120 [2020-11-29 22:46:54,978 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 22:46:54,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-11-29 22:46:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 22:46:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2020-11-29 22:46:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-29 22:46:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-11-29 22:46:54,982 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-11-29 22:46:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:54,983 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-11-29 22:46:54,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 22:46:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-11-29 22:46:54,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:46:54,983 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:54,984 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:55,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:55,195 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:55,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1730347856, now seen corresponding path program 33 times [2020-11-29 22:46:55,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:55,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188649743] [2020-11-29 22:46:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:55,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:55,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188649743] [2020-11-29 22:46:55,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920811409] [2020-11-29 22:46:55,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:55,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 22:46:55,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:55,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 22:46:55,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:55,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:55,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 22:46:55,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580869203] [2020-11-29 22:46:55,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 22:46:55,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:55,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 22:46:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:46:55,567 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 17 states. [2020-11-29 22:46:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:56,226 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-11-29 22:46:56,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-29 22:46:56,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-29 22:46:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:56,231 INFO L225 Difference]: With dead ends: 108 [2020-11-29 22:46:56,231 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 22:46:56,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-11-29 22:46:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 22:46:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 59. [2020-11-29 22:46:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-29 22:46:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 143 transitions. [2020-11-29 22:46:56,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 143 transitions. Word has length 20 [2020-11-29 22:46:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:56,235 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 143 transitions. [2020-11-29 22:46:56,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 22:46:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 143 transitions. [2020-11-29 22:46:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 22:46:56,235 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:56,236 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:56,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-29 22:46:56,451 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:56,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1624044134, now seen corresponding path program 34 times [2020-11-29 22:46:56,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:56,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985101160] [2020-11-29 22:46:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:56,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985101160] [2020-11-29 22:46:56,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981602611] [2020-11-29 22:46:56,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:56,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:46:56,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:56,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 22:46:56,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:56,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:56,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:56,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-29 22:46:56,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173257875] [2020-11-29 22:46:56,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-29 22:46:56,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:56,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 22:46:56,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-29 22:46:56,746 INFO L87 Difference]: Start difference. First operand 59 states and 143 transitions. Second operand 17 states. [2020-11-29 22:46:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:57,405 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-11-29 22:46:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 22:46:57,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-29 22:46:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:57,406 INFO L225 Difference]: With dead ends: 103 [2020-11-29 22:46:57,406 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 22:46:57,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-11-29 22:46:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 22:46:57,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2020-11-29 22:46:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 22:46:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-11-29 22:46:57,410 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 20 [2020-11-29 22:46:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:57,411 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-11-29 22:46:57,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-29 22:46:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-11-29 22:46:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 22:46:57,411 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:57,412 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:57,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:46:57,620 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:57,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:57,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2101150495, now seen corresponding path program 35 times [2020-11-29 22:46:57,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:57,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709271557] [2020-11-29 22:46:57,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:57,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709271557] [2020-11-29 22:46:57,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405564779] [2020-11-29 22:46:57,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:57,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 22:46:57,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:57,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 22:46:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:57,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:46:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:57,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:57,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 22:46:57,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536120862] [2020-11-29 22:46:57,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:46:57,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:57,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:46:57,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:46:57,976 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-11-29 22:46:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:58,645 INFO L93 Difference]: Finished difference Result 95 states and 231 transitions. [2020-11-29 22:46:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-29 22:46:58,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-29 22:46:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:58,647 INFO L225 Difference]: With dead ends: 95 [2020-11-29 22:46:58,647 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 22:46:58,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-29 22:46:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 22:46:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-11-29 22:46:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 22:46:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-11-29 22:46:58,650 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-11-29 22:46:58,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:58,651 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-11-29 22:46:58,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:46:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-11-29 22:46:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 22:46:58,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:58,652 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:46:58,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-29 22:46:58,860 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:46:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:46:58,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1194216792, now seen corresponding path program 36 times [2020-11-29 22:46:58,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:46:58,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722027380] [2020-11-29 22:46:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:46:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:46:59,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:59,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722027380] [2020-11-29 22:46:59,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330988743] [2020-11-29 22:46:59,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:46:59,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-29 22:46:59,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:46:59,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 22:46:59,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:46:59,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:46:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:46:59,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:46:59,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 22:46:59,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221455353] [2020-11-29 22:46:59,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:46:59,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:46:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:46:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:46:59,177 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 18 states. [2020-11-29 22:46:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:46:59,915 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-29 22:46:59,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 22:46:59,916 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-29 22:46:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:46:59,917 INFO L225 Difference]: With dead ends: 113 [2020-11-29 22:46:59,917 INFO L226 Difference]: Without dead ends: 104 [2020-11-29 22:46:59,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-11-29 22:46:59,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-29 22:46:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-11-29 22:46:59,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-29 22:46:59,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-29 22:46:59,921 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-29 22:46:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:46:59,921 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-29 22:46:59,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:46:59,921 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-29 22:46:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 22:46:59,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:46:59,922 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:00,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-29 22:47:00,132 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:00,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:00,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1041510855, now seen corresponding path program 37 times [2020-11-29 22:47:00,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:00,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597760474] [2020-11-29 22:47:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:00,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597760474] [2020-11-29 22:47:00,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927952748] [2020-11-29 22:47:00,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:47:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 22:47:00,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:00,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:00,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:00,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-29 22:47:00,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243021901] [2020-11-29 22:47:00,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:47:00,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:00,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:47:00,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:47:00,522 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-11-29 22:47:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:00,906 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-29 22:47:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-29 22:47:00,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-29 22:47:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:00,908 INFO L225 Difference]: With dead ends: 96 [2020-11-29 22:47:00,908 INFO L226 Difference]: Without dead ends: 90 [2020-11-29 22:47:00,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=704, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 22:47:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-29 22:47:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2020-11-29 22:47:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 22:47:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-29 22:47:00,912 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-29 22:47:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:00,912 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-29 22:47:00,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:47:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-29 22:47:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 22:47:00,912 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:00,912 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:01,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-29 22:47:01,113 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:01,113 INFO L82 PathProgramCache]: Analyzing trace with hash -718545367, now seen corresponding path program 38 times [2020-11-29 22:47:01,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:01,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103454563] [2020-11-29 22:47:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:01,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103454563] [2020-11-29 22:47:01,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401264950] [2020-11-29 22:47:01,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:47:01,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:47:01,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:01,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 22:47:01,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:01,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:01,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-29 22:47:01,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512160974] [2020-11-29 22:47:01,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:47:01,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:01,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:47:01,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:47:01,435 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 18 states. [2020-11-29 22:47:01,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:01,835 INFO L93 Difference]: Finished difference Result 132 states and 303 transitions. [2020-11-29 22:47:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-29 22:47:01,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-29 22:47:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:01,837 INFO L225 Difference]: With dead ends: 132 [2020-11-29 22:47:01,837 INFO L226 Difference]: Without dead ends: 126 [2020-11-29 22:47:01,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-11-29 22:47:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-29 22:47:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 76. [2020-11-29 22:47:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 22:47:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-11-29 22:47:01,841 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-11-29 22:47:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:01,841 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-11-29 22:47:01,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:47:01,841 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-11-29 22:47:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 22:47:01,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:01,842 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:02,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-29 22:47:02,042 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:02,042 INFO L82 PathProgramCache]: Analyzing trace with hash -711133299, now seen corresponding path program 39 times [2020-11-29 22:47:02,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:02,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628894825] [2020-11-29 22:47:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:02,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628894825] [2020-11-29 22:47:02,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994761540] [2020-11-29 22:47:02,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:47:02,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-29 22:47:02,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:02,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 22:47:02,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:02,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:02,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 22:47:02,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895253350] [2020-11-29 22:47:02,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 22:47:02,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:02,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 22:47:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-29 22:47:02,415 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-11-29 22:47:03,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:03,177 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-11-29 22:47:03,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-29 22:47:03,178 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-29 22:47:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:03,179 INFO L225 Difference]: With dead ends: 118 [2020-11-29 22:47:03,179 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 22:47:03,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-11-29 22:47:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 22:47:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 63. [2020-11-29 22:47:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 22:47:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-11-29 22:47:03,182 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 22 [2020-11-29 22:47:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:03,182 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-11-29 22:47:03,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 22:47:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-11-29 22:47:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-29 22:47:03,183 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:03,183 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:03,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:03,383 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:03,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:03,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1634010601, now seen corresponding path program 40 times [2020-11-29 22:47:03,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:03,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523981357] [2020-11-29 22:47:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:03,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523981357] [2020-11-29 22:47:03,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896362154] [2020-11-29 22:47:03,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:47:03,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:47:03,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 22:47:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:03,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:03,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:03,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-29 22:47:03,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16854838] [2020-11-29 22:47:03,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-29 22:47:03,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:03,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 22:47:03,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-29 22:47:03,670 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 19 states. [2020-11-29 22:47:04,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:04,609 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-11-29 22:47:04,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 22:47:04,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-29 22:47:04,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:04,610 INFO L225 Difference]: With dead ends: 113 [2020-11-29 22:47:04,610 INFO L226 Difference]: Without dead ends: 108 [2020-11-29 22:47:04,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-29 22:47:04,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-29 22:47:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2020-11-29 22:47:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-29 22:47:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-11-29 22:47:04,613 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 22 [2020-11-29 22:47:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:04,613 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-11-29 22:47:04,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-29 22:47:04,613 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-11-29 22:47:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 22:47:04,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:04,614 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:04,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-29 22:47:04,828 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash -570270300, now seen corresponding path program 41 times [2020-11-29 22:47:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:04,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082566814] [2020-11-29 22:47:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:05,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082566814] [2020-11-29 22:47:05,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306639138] [2020-11-29 22:47:05,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:47:05,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-29 22:47:05,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 22:47:05,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:05,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:05,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:05,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 22:47:05,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749473466] [2020-11-29 22:47:05,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:47:05,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:47:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:47:05,257 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-11-29 22:47:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:06,160 INFO L93 Difference]: Finished difference Result 103 states and 251 transitions. [2020-11-29 22:47:06,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 22:47:06,161 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-29 22:47:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:06,162 INFO L225 Difference]: With dead ends: 103 [2020-11-29 22:47:06,162 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 22:47:06,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-29 22:47:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 22:47:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-11-29 22:47:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:47:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-11-29 22:47:06,164 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-11-29 22:47:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:06,165 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-11-29 22:47:06,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:47:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-11-29 22:47:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 22:47:06,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:06,165 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:06,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-11-29 22:47:06,366 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -885256315, now seen corresponding path program 42 times [2020-11-29 22:47:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:06,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410066559] [2020-11-29 22:47:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:06,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410066559] [2020-11-29 22:47:06,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496541210] [2020-11-29 22:47:06,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:47:06,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-29 22:47:06,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:06,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-29 22:47:06,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:06,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:47:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:06,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:06,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-29 22:47:06,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461270579] [2020-11-29 22:47:06,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:47:06,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:06,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:47:06,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:47:06,684 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 20 states. [2020-11-29 22:47:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:07,645 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-29 22:47:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-29 22:47:07,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-29 22:47:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:07,647 INFO L225 Difference]: With dead ends: 123 [2020-11-29 22:47:07,647 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 22:47:07,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-11-29 22:47:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 22:47:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2020-11-29 22:47:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-29 22:47:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-29 22:47:07,652 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-29 22:47:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:07,652 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-29 22:47:07,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:47:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-29 22:47:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 22:47:07,653 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:07,653 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:07,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:07,853 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash -164539652, now seen corresponding path program 43 times [2020-11-29 22:47:07,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:07,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496636915] [2020-11-29 22:47:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:08,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496636915] [2020-11-29 22:47:08,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221734204] [2020-11-29 22:47:08,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/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 [2020-11-29 22:47:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 22:47:08,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:08,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:08,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:08,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-29 22:47:08,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907939062] [2020-11-29 22:47:08,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:47:08,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:08,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:47:08,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:47:08,292 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-11-29 22:47:08,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:08,769 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-29 22:47:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-29 22:47:08,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-29 22:47:08,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:08,771 INFO L225 Difference]: With dead ends: 104 [2020-11-29 22:47:08,771 INFO L226 Difference]: Without dead ends: 98 [2020-11-29 22:47:08,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=891, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 22:47:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-29 22:47:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-11-29 22:47:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 22:47:08,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-29 22:47:08,774 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-29 22:47:08,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:08,774 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-29 22:47:08,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:47:08,775 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-29 22:47:08,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 22:47:08,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:08,775 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:08,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-29 22:47:08,988 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:08,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:08,988 INFO L82 PathProgramCache]: Analyzing trace with hash 967649004, now seen corresponding path program 44 times [2020-11-29 22:47:08,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:08,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369094536] [2020-11-29 22:47:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369094536] [2020-11-29 22:47:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114293674] [2020-11-29 22:47:09,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:09,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:47:09,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 22:47:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:09,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:09,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-29 22:47:09,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723097295] [2020-11-29 22:47:09,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-29 22:47:09,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 22:47:09,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-29 22:47:09,480 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 20 states. [2020-11-29 22:47:09,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:09,980 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2020-11-29 22:47:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 22:47:09,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-29 22:47:09,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:09,982 INFO L225 Difference]: With dead ends: 144 [2020-11-29 22:47:09,982 INFO L226 Difference]: Without dead ends: 138 [2020-11-29 22:47:09,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-11-29 22:47:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-29 22:47:09,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-11-29 22:47:09,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-29 22:47:09,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-11-29 22:47:09,987 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 24 [2020-11-29 22:47:09,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:09,987 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-11-29 22:47:09,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-29 22:47:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-11-29 22:47:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 22:47:09,988 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:09,988 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:10,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:10,207 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:10,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:10,208 INFO L82 PathProgramCache]: Analyzing trace with hash -498487510, now seen corresponding path program 45 times [2020-11-29 22:47:10,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:10,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331637861] [2020-11-29 22:47:10,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331637861] [2020-11-29 22:47:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619532389] [2020-11-29 22:47:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:10,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-29 22:47:10,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 22:47:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:10,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:47:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:10,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:10,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 22:47:10,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853742959] [2020-11-29 22:47:10,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 22:47:10,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 22:47:10,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-29 22:47:10,543 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 21 states. [2020-11-29 22:47:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:11,467 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-11-29 22:47:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-29 22:47:11,468 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-29 22:47:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:11,469 INFO L225 Difference]: With dead ends: 128 [2020-11-29 22:47:11,469 INFO L226 Difference]: Without dead ends: 119 [2020-11-29 22:47:11,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 22:47:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-29 22:47:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2020-11-29 22:47:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-29 22:47:11,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 163 transitions. [2020-11-29 22:47:11,472 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 163 transitions. Word has length 24 [2020-11-29 22:47:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:11,472 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 163 transitions. [2020-11-29 22:47:11,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 22:47:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 163 transitions. [2020-11-29 22:47:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-29 22:47:11,473 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:11,473 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:11,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-11-29 22:47:11,673 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:11,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1673116500, now seen corresponding path program 46 times [2020-11-29 22:47:11,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:11,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019064638] [2020-11-29 22:47:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:11,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019064638] [2020-11-29 22:47:11,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84457322] [2020-11-29 22:47:11,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:11,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:47:11,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 22:47:11,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:12,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:12,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:12,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-29 22:47:12,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198318554] [2020-11-29 22:47:12,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-29 22:47:12,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:12,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-29 22:47:12,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-29 22:47:12,018 INFO L87 Difference]: Start difference. First operand 67 states and 163 transitions. Second operand 21 states. [2020-11-29 22:47:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:13,151 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-11-29 22:47:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 22:47:13,152 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-29 22:47:13,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:13,152 INFO L225 Difference]: With dead ends: 123 [2020-11-29 22:47:13,152 INFO L226 Difference]: Without dead ends: 118 [2020-11-29 22:47:13,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-29 22:47:13,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-29 22:47:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 83. [2020-11-29 22:47:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 22:47:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-11-29 22:47:13,156 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 24 [2020-11-29 22:47:13,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:13,156 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-11-29 22:47:13,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-29 22:47:13,157 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-11-29 22:47:13,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 22:47:13,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:13,157 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:13,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:13,372 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1726781863, now seen corresponding path program 47 times [2020-11-29 22:47:13,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:13,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118462212] [2020-11-29 22:47:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:13,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118462212] [2020-11-29 22:47:13,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712683612] [2020-11-29 22:47:13,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:13,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-29 22:47:13,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 22:47:13,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:13,738 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:13,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:13,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 22:47:13,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070055793] [2020-11-29 22:47:13,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 22:47:13,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 22:47:13,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:47:13,765 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-11-29 22:47:14,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:14,772 INFO L93 Difference]: Finished difference Result 111 states and 271 transitions. [2020-11-29 22:47:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-29 22:47:14,778 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-29 22:47:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:14,779 INFO L225 Difference]: With dead ends: 111 [2020-11-29 22:47:14,779 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 22:47:14,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-29 22:47:14,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 22:47:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2020-11-29 22:47:14,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 22:47:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-11-29 22:47:14,783 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-11-29 22:47:14,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:14,783 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-11-29 22:47:14,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 22:47:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-11-29 22:47:14,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-29 22:47:14,784 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:14,784 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:14,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-29 22:47:14,996 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:14,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:14,996 INFO L82 PathProgramCache]: Analyzing trace with hash -326981342, now seen corresponding path program 48 times [2020-11-29 22:47:14,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:14,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917353532] [2020-11-29 22:47:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:15,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917353532] [2020-11-29 22:47:15,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88947679] [2020-11-29 22:47:15,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:15,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-29 22:47:15,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:15,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 22:47:15,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:15,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:47:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:15,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:15,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-29 22:47:15,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732889589] [2020-11-29 22:47:15,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 22:47:15,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:15,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 22:47:15,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:47:15,378 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 22 states. [2020-11-29 22:47:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:16,331 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-29 22:47:16,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-29 22:47:16,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-29 22:47:16,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:16,332 INFO L225 Difference]: With dead ends: 133 [2020-11-29 22:47:16,332 INFO L226 Difference]: Without dead ends: 124 [2020-11-29 22:47:16,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-11-29 22:47:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-29 22:47:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2020-11-29 22:47:16,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 22:47:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-29 22:47:16,337 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-29 22:47:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:16,337 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-29 22:47:16,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 22:47:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-29 22:47:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:47:16,338 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:16,338 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:16,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-29 22:47:16,538 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:16,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:16,538 INFO L82 PathProgramCache]: Analyzing trace with hash 791196415, now seen corresponding path program 49 times [2020-11-29 22:47:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:16,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319623384] [2020-11-29 22:47:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:16,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319623384] [2020-11-29 22:47:16,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678360629] [2020-11-29 22:47:16,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:16,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 22:47:16,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:16,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:16,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:16,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-29 22:47:16,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313713114] [2020-11-29 22:47:16,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 22:47:16,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:16,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 22:47:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:47:16,915 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-11-29 22:47:17,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:17,443 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-29 22:47:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 22:47:17,444 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-29 22:47:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:17,445 INFO L225 Difference]: With dead ends: 112 [2020-11-29 22:47:17,445 INFO L226 Difference]: Without dead ends: 106 [2020-11-29 22:47:17,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1100, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 22:47:17,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-29 22:47:17,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2020-11-29 22:47:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 22:47:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-29 22:47:17,448 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-29 22:47:17,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:17,448 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-29 22:47:17,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 22:47:17,449 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-29 22:47:17,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:47:17,449 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:17,449 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:17,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:17,650 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:17,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2097198353, now seen corresponding path program 50 times [2020-11-29 22:47:17,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:17,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369436672] [2020-11-29 22:47:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:17,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369436672] [2020-11-29 22:47:17,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158318610] [2020-11-29 22:47:17,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:18,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:47:18,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 22:47:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:18,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:18,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-29 22:47:18,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807038909] [2020-11-29 22:47:18,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-29 22:47:18,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:18,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-29 22:47:18,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-11-29 22:47:18,069 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 22 states. [2020-11-29 22:47:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:18,552 INFO L93 Difference]: Finished difference Result 156 states and 359 transitions. [2020-11-29 22:47:18,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-29 22:47:18,552 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-29 22:47:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:18,553 INFO L225 Difference]: With dead ends: 156 [2020-11-29 22:47:18,553 INFO L226 Difference]: Without dead ends: 150 [2020-11-29 22:47:18,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-11-29 22:47:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-29 22:47:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2020-11-29 22:47:18,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 22:47:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-11-29 22:47:18,557 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 26 [2020-11-29 22:47:18,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:18,557 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-11-29 22:47:18,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-29 22:47:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-11-29 22:47:18,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:47:18,558 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:18,558 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:18,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-11-29 22:47:18,767 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1990652807, now seen corresponding path program 51 times [2020-11-29 22:47:18,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:18,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916175487] [2020-11-29 22:47:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916175487] [2020-11-29 22:47:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74607861] [2020-11-29 22:47:19,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:19,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-29 22:47:19,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:19,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 22:47:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:19,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:47:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:19,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:19,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 22:47:19,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369432466] [2020-11-29 22:47:19,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 22:47:19,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 22:47:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-29 22:47:19,331 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 23 states. [2020-11-29 22:47:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:20,681 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-11-29 22:47:20,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-29 22:47:20,682 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-29 22:47:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:20,683 INFO L225 Difference]: With dead ends: 138 [2020-11-29 22:47:20,683 INFO L226 Difference]: Without dead ends: 129 [2020-11-29 22:47:20,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-29 22:47:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-29 22:47:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 71. [2020-11-29 22:47:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-29 22:47:20,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-11-29 22:47:20,685 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 26 [2020-11-29 22:47:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:20,685 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-11-29 22:47:20,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 22:47:20,686 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-11-29 22:47:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:47:20,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:20,686 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:20,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:20,893 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1546461521, now seen corresponding path program 52 times [2020-11-29 22:47:20,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:20,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819377576] [2020-11-29 22:47:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:21,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819377576] [2020-11-29 22:47:21,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002089658] [2020-11-29 22:47:21,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:21,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:47:21,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:21,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 22:47:21,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:21,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:21,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:21,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-29 22:47:21,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560557129] [2020-11-29 22:47:21,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-29 22:47:21,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:21,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-29 22:47:21,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-29 22:47:21,311 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 23 states. [2020-11-29 22:47:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:22,323 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-11-29 22:47:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 22:47:22,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-29 22:47:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:22,329 INFO L225 Difference]: With dead ends: 133 [2020-11-29 22:47:22,330 INFO L226 Difference]: Without dead ends: 128 [2020-11-29 22:47:22,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-11-29 22:47:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-29 22:47:22,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2020-11-29 22:47:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-29 22:47:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-11-29 22:47:22,333 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 26 [2020-11-29 22:47:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:22,333 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-11-29 22:47:22,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-29 22:47:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-11-29 22:47:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 22:47:22,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:22,334 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:22,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:22,540 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:22,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1580720362, now seen corresponding path program 53 times [2020-11-29 22:47:22,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:22,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221435731] [2020-11-29 22:47:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221435731] [2020-11-29 22:47:22,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632681217] [2020-11-29 22:47:22,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:23,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-29 22:47:23,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 22:47:23,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:23,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 22:47:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:23,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:23,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 22:47:23,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801466226] [2020-11-29 22:47:23,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 22:47:23,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 22:47:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-29 22:47:23,096 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-11-29 22:47:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:24,161 INFO L93 Difference]: Finished difference Result 119 states and 291 transitions. [2020-11-29 22:47:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-29 22:47:24,162 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-29 22:47:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:24,163 INFO L225 Difference]: With dead ends: 119 [2020-11-29 22:47:24,163 INFO L226 Difference]: Without dead ends: 114 [2020-11-29 22:47:24,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-29 22:47:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-29 22:47:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2020-11-29 22:47:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 22:47:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-11-29 22:47:24,166 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-11-29 22:47:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:24,167 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-11-29 22:47:24,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 22:47:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-11-29 22:47:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-29 22:47:24,167 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:24,167 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:24,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-29 22:47:24,380 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:24,380 INFO L82 PathProgramCache]: Analyzing trace with hash -695644289, now seen corresponding path program 54 times [2020-11-29 22:47:24,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:24,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262608360] [2020-11-29 22:47:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:47:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:24,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262608360] [2020-11-29 22:47:24,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100511780] [2020-11-29 22:47:24,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:24,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-29 22:47:24,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:47:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-29 22:47:24,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:47:24,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:47:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:47:24,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:47:24,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-29 22:47:24,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925056616] [2020-11-29 22:47:24,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-29 22:47:24,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:47:24,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 22:47:24,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-29 22:47:24,801 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 24 states. [2020-11-29 22:47:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:47:25,942 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-11-29 22:47:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-29 22:47:25,942 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-29 22:47:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:47:25,943 INFO L225 Difference]: With dead ends: 143 [2020-11-29 22:47:25,943 INFO L226 Difference]: Without dead ends: 134 [2020-11-29 22:47:25,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-11-29 22:47:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-11-29 22:47:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2020-11-29 22:47:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-29 22:47:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-29 22:47:25,947 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-29 22:47:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:47:25,947 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-29 22:47:25,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-29 22:47:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-29 22:47:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 22:47:25,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:47:25,948 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:47:26,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:47:26,163 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:47:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:47:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash 130555458, now seen corresponding path program 55 times [2020-11-29 22:47:26,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:47:26,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443864688] [2020-11-29 22:47:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:47:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:47:26,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:47:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:47:26,207 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:47:26,238 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:47:26,239 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 22:47:26,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-11-29 22:47:26,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:47:26 BasicIcfg [2020-11-29 22:47:26,332 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:47:26,333 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:47:26,333 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:47:26,333 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:47:26,333 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:46:27" (3/4) ... [2020-11-29 22:47:26,335 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 22:47:26,417 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9345693b-a634-4079-ade9-18bbe7090c78/bin/uautomizer/witness.graphml [2020-11-29 22:47:26,417 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:47:26,418 INFO L168 Benchmark]: Toolchain (without parser) took 60076.70 ms. Allocated memory was 104.9 MB in the beginning and 251.7 MB in the end (delta: 146.8 MB). Free memory was 46.5 MB in the beginning and 211.8 MB in the end (delta: -165.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:47:26,418 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory is still 64.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:47:26,418 INFO L168 Benchmark]: CACSL2BoogieTranslator took 838.99 ms. Allocated memory was 104.9 MB in the beginning and 144.7 MB in the end (delta: 39.8 MB). Free memory was 46.3 MB in the beginning and 102.6 MB in the end (delta: -56.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2020-11-29 22:47:26,419 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.22 ms. Allocated memory is still 144.7 MB. Free memory was 102.6 MB in the beginning and 100.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:47:26,419 INFO L168 Benchmark]: Boogie Preprocessor took 27.69 ms. Allocated memory is still 144.7 MB. Free memory was 100.8 MB in the beginning and 99.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:47:26,419 INFO L168 Benchmark]: RCFGBuilder took 631.91 ms. Allocated memory is still 144.7 MB. Free memory was 99.5 MB in the beginning and 79.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 22:47:26,420 INFO L168 Benchmark]: TraceAbstraction took 58418.57 ms. Allocated memory was 144.7 MB in the beginning and 251.7 MB in the end (delta: 107.0 MB). Free memory was 78.6 MB in the beginning and 220.2 MB in the end (delta: -141.6 MB). Peak memory consumption was 113.3 MB. Max. memory is 16.1 GB. [2020-11-29 22:47:26,420 INFO L168 Benchmark]: Witness Printer took 84.65 ms. Allocated memory is still 251.7 MB. Free memory was 220.2 MB in the beginning and 211.8 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:47:26,423 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 104.9 MB. Free memory is still 64.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 838.99 ms. Allocated memory was 104.9 MB in the beginning and 144.7 MB in the end (delta: 39.8 MB). Free memory was 46.3 MB in the beginning and 102.6 MB in the end (delta: -56.4 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 68.22 ms. Allocated memory is still 144.7 MB. Free memory was 102.6 MB in the beginning and 100.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.69 ms. Allocated memory is still 144.7 MB. Free memory was 100.8 MB in the beginning and 99.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 631.91 ms. Allocated memory is still 144.7 MB. Free memory was 99.5 MB in the beginning and 79.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 58418.57 ms. Allocated memory was 144.7 MB in the beginning and 251.7 MB in the end (delta: 107.0 MB). Free memory was 78.6 MB in the beginning and 220.2 MB in the end (delta: -141.6 MB). Peak memory consumption was 113.3 MB. Max. memory is 16.1 GB. * Witness Printer took 84.65 ms. Allocated memory is still 251.7 MB. Free memory was 220.2 MB in the beginning and 211.8 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 751 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 10 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 2.2s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 60 TotalNumberOfCompositions, 1062 MoverChecksTotal - CounterExampleResult [Line: 693]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L693] COND FALSE 0 !(0) [L693] 0 __assert_fail ("0", "triangular-longer-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 58.2s, OverallIterations: 57, TraceHistogramMax: 10, AutomataDifference: 27.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 826 SDtfs, 3161 SDslu, 4125 SDs, 0 SdLazy, 4633 SolverSat, 2567 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2529 GetRequests, 824 SyntacticMatches, 42 SemanticMatches, 1663 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15596 ImplicationChecksByTransitivity, 30.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 56 MinimizatonAttempts, 1448 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 1982 NumberOfCodeBlocks, 1982 NumberOfCodeBlocksAsserted, 249 NumberOfCheckSat, 1848 ConstructedInterpolants, 0 QuantifiedInterpolants, 154302 SizeOfPredicates, 558 NumberOfNonLiveVariables, 6650 ConjunctsInSsa, 766 ConjunctsInUnsatCore, 106 InterpolantComputations, 6 PerfectInterpolantSequences, 0/3060 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...