./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa --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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:12:50,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:12:50,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:12:50,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:12:50,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:12:50,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:12:50,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:12:50,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:12:50,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:12:50,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:12:50,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:12:50,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:12:50,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:12:50,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:12:50,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:12:50,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:12:50,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:12:50,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:12:50,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:12:50,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:12:50,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:12:50,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:12:50,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:12:50,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:12:50,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:12:50,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:12:50,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:12:50,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:12:50,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:12:50,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:12:50,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:12:50,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:12:50,165 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:12:50,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:12:50,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:12:50,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:12:50,167 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:12:50,168 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:12:50,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:12:50,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:12:50,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:12:50,170 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:12:50,187 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:12:50,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:12:50,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:12:50,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:12:50,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:12:50,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:12:50,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:12:50,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:12:50,189 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:12:50,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:12:50,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:12:50,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:12:50,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:12:50,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:12:50,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:12:50,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:12:50,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:12:50,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:12:50,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:12:50,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:12:50,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:12:50,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:12:50,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:12:50,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:12:50,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:12:50,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:12:50,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:12:50,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:12:50,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:12:50,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:12:50,192 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:12:50,192 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:12:50,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:12:50,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:12:50,192 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_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2021-12-07 00:12:50,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:12:50,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:12:50,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:12:50,401 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:12:50,402 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:12:50,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-12-07 00:12:50,443 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/data/36d818ac6/62e65d7e5bc446179c9813986e012256/FLAGdc026e9a8 [2021-12-07 00:12:50,802 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:12:50,802 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/sv-benchmarks/c/weaver/test-easy1.wvr.c [2021-12-07 00:12:50,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/data/36d818ac6/62e65d7e5bc446179c9813986e012256/FLAGdc026e9a8 [2021-12-07 00:12:50,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/data/36d818ac6/62e65d7e5bc446179c9813986e012256 [2021-12-07 00:12:50,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:12:50,819 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:12:50,821 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:12:50,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:12:50,823 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:12:50,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:50,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c844a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50, skipping insertion in model container [2021-12-07 00:12:50,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:50,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:12:50,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:12:50,952 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2021-12-07 00:12:50,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:12:50,960 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:12:50,973 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2021-12-07 00:12:50,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:12:50,984 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:12:50,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50 WrapperNode [2021-12-07 00:12:50,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:12:50,985 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:12:50,985 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:12:50,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:12:50,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:50,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,010 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2021-12-07 00:12:51,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:12:51,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:12:51,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:12:51,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:12:51,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:12:51,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:12:51,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:12:51,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:12:51,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (1/1) ... [2021-12-07 00:12:51,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:12:51,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:51,057 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:12:51,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:12:51,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:12:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-07 00:12:51,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-07 00:12:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-07 00:12:51,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-07 00:12:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:12:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:12:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:12:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:12:51,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:12:51,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:12:51,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:12:51,097 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-07 00:12:51,150 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:12:51,152 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:12:51,259 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:12:51,265 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:12:51,265 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 00:12:51,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:12:51 BoogieIcfgContainer [2021-12-07 00:12:51,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:12:51,268 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:12:51,268 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:12:51,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:12:51,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:12:50" (1/3) ... [2021-12-07 00:12:51,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3589ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:12:51, skipping insertion in model container [2021-12-07 00:12:51,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:12:50" (2/3) ... [2021-12-07 00:12:51,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e3589ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:12:51, skipping insertion in model container [2021-12-07 00:12:51,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:12:51" (3/3) ... [2021-12-07 00:12:51,280 INFO L111 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2021-12-07 00:12:51,285 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-07 00:12:51,286 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:12:51,286 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:12:51,286 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-07 00:12:51,306 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,307 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,307 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,307 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,307 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,308 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,308 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,308 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,308 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,309 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,309 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,310 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,310 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,310 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,310 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,311 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,311 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,311 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,312 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,312 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,315 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,315 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,316 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,318 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,319 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,319 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-07 00:12:51,322 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-07 00:12:51,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:12:51,378 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:12:51,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-07 00:12:51,391 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2021-12-07 00:12:51,433 INFO L129 PetriNetUnfolder]: 6/82 cut-off events. [2021-12-07 00:12:51,433 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-07 00:12:51,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2021-12-07 00:12:51,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2021-12-07 00:12:51,442 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2021-12-07 00:12:51,462 INFO L129 PetriNetUnfolder]: 6/72 cut-off events. [2021-12-07 00:12:51,463 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-07 00:12:51,463 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:51,464 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:51,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1675015954, now seen corresponding path program 1 times [2021-12-07 00:12:51,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:51,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053180505] [2021-12-07 00:12:51,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:51,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:51,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053180505] [2021-12-07 00:12:51,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053180505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:51,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:51,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:12:51,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176142920] [2021-12-07 00:12:51,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:51,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:12:51,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:12:51,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:12:51,661 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2021-12-07 00:12:51,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:51,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:51,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2021-12-07 00:12:51,665 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:12:51,688 INFO L129 PetriNetUnfolder]: 2/69 cut-off events. [2021-12-07 00:12:51,688 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-07 00:12:51,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2021-12-07 00:12:51,689 INFO L132 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2021-12-07 00:12:51,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2021-12-07 00:12:51,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:12:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-07 00:12:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2021-12-07 00:12:51,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2021-12-07 00:12:51,700 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2021-12-07 00:12:51,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2021-12-07 00:12:51,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:12:51,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2021-12-07 00:12:51,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:51,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:51,709 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:51,710 INFO L186 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2021-12-07 00:12:51,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2021-12-07 00:12:51,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-07 00:12:51,716 INFO L242 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2021-12-07 00:12:51,717 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2021-12-07 00:12:51,720 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2021-12-07 00:12:51,720 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2021-12-07 00:12:51,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:51,720 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:51,721 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:51,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:12:51,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:51,722 INFO L85 PathProgramCache]: Analyzing trace with hash 845260518, now seen corresponding path program 1 times [2021-12-07 00:12:51,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:51,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052671345] [2021-12-07 00:12:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:51,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:51,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:51,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052671345] [2021-12-07 00:12:51,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052671345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:51,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:51,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:12:51,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058470609] [2021-12-07 00:12:51,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:51,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:12:51,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:51,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:12:51,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:12:51,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-07 00:12:51,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:51,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:51,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-07 00:12:51,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:12:52,040 INFO L129 PetriNetUnfolder]: 62/212 cut-off events. [2021-12-07 00:12:52,040 INFO L130 PetriNetUnfolder]: For 11/23 co-relation queries the response was YES. [2021-12-07 00:12:52,041 INFO L84 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 212 events. 62/212 cut-off events. For 11/23 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 30 based on Foata normal form. 2/178 useless extension candidates. Maximal degree in co-relation 352. Up to 85 conditions per place. [2021-12-07 00:12:52,043 INFO L132 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2021-12-07 00:12:52,043 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2021-12-07 00:12:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:12:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-07 00:12:52,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2021-12-07 00:12:52,049 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2021-12-07 00:12:52,049 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2021-12-07 00:12:52,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2021-12-07 00:12:52,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:12:52,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2021-12-07 00:12:52,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,057 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,057 INFO L186 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2021-12-07 00:12:52,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2021-12-07 00:12:52,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-07 00:12:52,061 INFO L242 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2021-12-07 00:12:52,061 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2021-12-07 00:12:52,062 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2021-12-07 00:12:52,062 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2021-12-07 00:12:52,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,063 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:52,063 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:52,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:12:52,063 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1873293087, now seen corresponding path program 1 times [2021-12-07 00:12:52,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:52,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262193212] [2021-12-07 00:12:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:52,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:52,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:52,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262193212] [2021-12-07 00:12:52,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262193212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:52,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68568668] [2021-12-07 00:12:52,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:52,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:52,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:52,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:52,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:12:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:12:52,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:52,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:52,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68568668] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:52,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:12:52,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2021-12-07 00:12:52,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922889215] [2021-12-07 00:12:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:52,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:12:52,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:12:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:12:52,634 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-07 00:12:52,635 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,635 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:52,635 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-07 00:12:52,635 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:12:52,725 INFO L129 PetriNetUnfolder]: 62/253 cut-off events. [2021-12-07 00:12:52,725 INFO L130 PetriNetUnfolder]: For 25/32 co-relation queries the response was YES. [2021-12-07 00:12:52,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 253 events. 62/253 cut-off events. For 25/32 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 977 event pairs, 22 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 459. Up to 89 conditions per place. [2021-12-07 00:12:52,729 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 37 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2021-12-07 00:12:52,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 324 flow [2021-12-07 00:12:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:12:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-07 00:12:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2021-12-07 00:12:52,732 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2021-12-07 00:12:52,732 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2021-12-07 00:12:52,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2021-12-07 00:12:52,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:12:52,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2021-12-07 00:12:52,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,737 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,737 INFO L186 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 6 states and 365 transitions. [2021-12-07 00:12:52,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 324 flow [2021-12-07 00:12:52,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 305 flow, removed 6 selfloop flow, removed 5 redundant places. [2021-12-07 00:12:52,741 INFO L242 Difference]: Finished difference. Result has 79 places, 73 transitions, 210 flow [2021-12-07 00:12:52,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2021-12-07 00:12:52,743 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 5 predicate places. [2021-12-07 00:12:52,750 INFO L470 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 210 flow [2021-12-07 00:12:52,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:52,750 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:52,751 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:52,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:12:52,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:52,953 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2021-12-07 00:12:52,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:52,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506301754] [2021-12-07 00:12:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:52,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:53,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506301754] [2021-12-07 00:12:53,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506301754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:53,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:53,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:12:53,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21351396] [2021-12-07 00:12:53,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:53,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:12:53,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:12:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:12:53,156 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-07 00:12:53,157 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:53,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-07 00:12:53,157 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:12:53,232 INFO L129 PetriNetUnfolder]: 55/228 cut-off events. [2021-12-07 00:12:53,232 INFO L130 PetriNetUnfolder]: For 141/155 co-relation queries the response was YES. [2021-12-07 00:12:53,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 228 events. 55/228 cut-off events. For 141/155 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 860 event pairs, 7 based on Foata normal form. 5/229 useless extension candidates. Maximal degree in co-relation 486. Up to 94 conditions per place. [2021-12-07 00:12:53,236 INFO L132 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 7 changer transitions 5/88 dead transitions. [2021-12-07 00:12:53,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 356 flow [2021-12-07 00:12:53,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:12:53,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-07 00:12:53,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 360 transitions. [2021-12-07 00:12:53,238 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2021-12-07 00:12:53,238 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 360 transitions. [2021-12-07 00:12:53,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 360 transitions. [2021-12-07 00:12:53,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:12:53,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 360 transitions. [2021-12-07 00:12:53,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.0) internal successors, (360), 6 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,241 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,241 INFO L186 Difference]: Start difference. First operand has 79 places, 73 transitions, 210 flow. Second operand 6 states and 360 transitions. [2021-12-07 00:12:53,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 356 flow [2021-12-07 00:12:53,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-07 00:12:53,245 INFO L242 Difference]: Finished difference. Result has 84 places, 75 transitions, 246 flow [2021-12-07 00:12:53,245 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2021-12-07 00:12:53,246 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 10 predicate places. [2021-12-07 00:12:53,246 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 246 flow [2021-12-07 00:12:53,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,246 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:53,246 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:53,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:12:53,247 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:53,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:53,247 INFO L85 PathProgramCache]: Analyzing trace with hash 572715733, now seen corresponding path program 1 times [2021-12-07 00:12:53,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:53,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805478621] [2021-12-07 00:12:53,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:53,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:53,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:53,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805478621] [2021-12-07 00:12:53,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805478621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:12:53,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:12:53,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:12:53,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688090582] [2021-12-07 00:12:53,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:12:53,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:12:53,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:12:53,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:12:53,330 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2021-12-07 00:12:53,331 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,331 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:53,331 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2021-12-07 00:12:53,331 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:12:53,419 INFO L129 PetriNetUnfolder]: 50/221 cut-off events. [2021-12-07 00:12:53,419 INFO L130 PetriNetUnfolder]: For 204/207 co-relation queries the response was YES. [2021-12-07 00:12:53,420 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 221 events. 50/221 cut-off events. For 204/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 742 event pairs, 9 based on Foata normal form. 7/224 useless extension candidates. Maximal degree in co-relation 500. Up to 57 conditions per place. [2021-12-07 00:12:53,422 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 33 selfloop transitions, 11 changer transitions 4/91 dead transitions. [2021-12-07 00:12:53,422 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 402 flow [2021-12-07 00:12:53,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:12:53,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-07 00:12:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2021-12-07 00:12:53,424 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7091836734693877 [2021-12-07 00:12:53,424 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2021-12-07 00:12:53,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2021-12-07 00:12:53,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:12:53,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2021-12-07 00:12:53,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.57142857142857) internal successors, (417), 7 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,427 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,428 INFO L186 Difference]: Start difference. First operand has 84 places, 75 transitions, 246 flow. Second operand 7 states and 417 transitions. [2021-12-07 00:12:53,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 402 flow [2021-12-07 00:12:53,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 91 transitions, 390 flow, removed 1 selfloop flow, removed 4 redundant places. [2021-12-07 00:12:53,431 INFO L242 Difference]: Finished difference. Result has 89 places, 75 transitions, 273 flow [2021-12-07 00:12:53,431 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=273, PETRI_PLACES=89, PETRI_TRANSITIONS=75} [2021-12-07 00:12:53,432 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 15 predicate places. [2021-12-07 00:12:53,432 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 75 transitions, 273 flow [2021-12-07 00:12:53,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:53,432 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:53,432 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:53,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:12:53,433 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1240332628, now seen corresponding path program 1 times [2021-12-07 00:12:53,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:53,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281457454] [2021-12-07 00:12:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:53,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:53,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281457454] [2021-12-07 00:12:53,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281457454] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:53,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370252039] [2021-12-07 00:12:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:53,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:53,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:53,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:53,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:12:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:12:53,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:53,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:54,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370252039] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:54,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:54,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2021-12-07 00:12:54,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885677472] [2021-12-07 00:12:54,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:54,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-07 00:12:54,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:54,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-07 00:12:54,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:12:54,054 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:12:54,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 75 transitions, 273 flow. Second operand has 20 states, 20 states have (on average 53.1) internal successors, (1062), 20 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:54,056 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:54,056 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:12:54,056 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:12:54,415 INFO L129 PetriNetUnfolder]: 83/283 cut-off events. [2021-12-07 00:12:54,415 INFO L130 PetriNetUnfolder]: For 386/386 co-relation queries the response was YES. [2021-12-07 00:12:54,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 283 events. 83/283 cut-off events. For 386/386 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1028 event pairs, 7 based on Foata normal form. 1/280 useless extension candidates. Maximal degree in co-relation 759. Up to 60 conditions per place. [2021-12-07 00:12:54,418 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 34 selfloop transitions, 65 changer transitions 6/146 dead transitions. [2021-12-07 00:12:54,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 146 transitions, 844 flow [2021-12-07 00:12:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:12:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-07 00:12:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1465 transitions. [2021-12-07 00:12:54,425 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6459435626102292 [2021-12-07 00:12:54,425 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1465 transitions. [2021-12-07 00:12:54,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1465 transitions. [2021-12-07 00:12:54,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:12:54,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1465 transitions. [2021-12-07 00:12:54,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 54.25925925925926) internal successors, (1465), 27 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:54,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:54,438 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:54,438 INFO L186 Difference]: Start difference. First operand has 89 places, 75 transitions, 273 flow. Second operand 27 states and 1465 transitions. [2021-12-07 00:12:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 146 transitions, 844 flow [2021-12-07 00:12:54,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 146 transitions, 821 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-12-07 00:12:54,445 INFO L242 Difference]: Finished difference. Result has 116 places, 129 transitions, 715 flow [2021-12-07 00:12:54,445 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=715, PETRI_PLACES=116, PETRI_TRANSITIONS=129} [2021-12-07 00:12:54,446 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 42 predicate places. [2021-12-07 00:12:54,446 INFO L470 AbstractCegarLoop]: Abstraction has has 116 places, 129 transitions, 715 flow [2021-12-07 00:12:54,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.1) internal successors, (1062), 20 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:54,447 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:54,447 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:54,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:12:54,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:54,649 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:54,649 INFO L85 PathProgramCache]: Analyzing trace with hash -316955640, now seen corresponding path program 2 times [2021-12-07 00:12:54,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:54,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96686070] [2021-12-07 00:12:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:54,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:54,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96686070] [2021-12-07 00:12:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96686070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77888611] [2021-12-07 00:12:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:12:54,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:54,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:54,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:54,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:12:54,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:12:54,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:54,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:12:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:55,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:55,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77888611] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:55,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:55,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-07 00:12:55,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209365460] [2021-12-07 00:12:55,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:55,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:12:55,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:55,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:12:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:12:55,234 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:12:55,236 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 129 transitions, 715 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:55,236 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:55,236 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:12:55,236 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:12:56,215 INFO L129 PetriNetUnfolder]: 184/556 cut-off events. [2021-12-07 00:12:56,215 INFO L130 PetriNetUnfolder]: For 1079/1079 co-relation queries the response was YES. [2021-12-07 00:12:56,217 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1924 conditions, 556 events. 184/556 cut-off events. For 1079/1079 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2910 event pairs, 0 based on Foata normal form. 23/579 useless extension candidates. Maximal degree in co-relation 1906. Up to 88 conditions per place. [2021-12-07 00:12:56,220 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 96 selfloop transitions, 135 changer transitions 48/320 dead transitions. [2021-12-07 00:12:56,220 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 320 transitions, 2522 flow [2021-12-07 00:12:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 00:12:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-07 00:12:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2524 transitions. [2021-12-07 00:12:56,226 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6532091097308489 [2021-12-07 00:12:56,227 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2524 transitions. [2021-12-07 00:12:56,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2524 transitions. [2021-12-07 00:12:56,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:12:56,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2524 transitions. [2021-12-07 00:12:56,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.869565217391305) internal successors, (2524), 46 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:56,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:56,241 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:56,242 INFO L186 Difference]: Start difference. First operand has 116 places, 129 transitions, 715 flow. Second operand 46 states and 2524 transitions. [2021-12-07 00:12:56,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 320 transitions, 2522 flow [2021-12-07 00:12:56,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 320 transitions, 2348 flow, removed 41 selfloop flow, removed 7 redundant places. [2021-12-07 00:12:56,254 INFO L242 Difference]: Finished difference. Result has 175 places, 226 transitions, 1755 flow [2021-12-07 00:12:56,254 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1755, PETRI_PLACES=175, PETRI_TRANSITIONS=226} [2021-12-07 00:12:56,255 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 101 predicate places. [2021-12-07 00:12:56,255 INFO L470 AbstractCegarLoop]: Abstraction has has 175 places, 226 transitions, 1755 flow [2021-12-07 00:12:56,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:56,256 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:56,256 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:56,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:12:56,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:12:56,458 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:56,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash -739440010, now seen corresponding path program 3 times [2021-12-07 00:12:56,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:56,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500382856] [2021-12-07 00:12:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:56,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:56,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:56,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500382856] [2021-12-07 00:12:56,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500382856] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:56,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219868307] [2021-12-07 00:12:56,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:12:56,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:56,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:56,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:12:56,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:12:56,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:12:56,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:56,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:12:57,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219868307] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:57,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:57,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-07 00:12:57,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599127814] [2021-12-07 00:12:57,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:57,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:12:57,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:12:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:12:57,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:12:57,134 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 226 transitions, 1755 flow. Second operand has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:57,134 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:57,134 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:12:57,134 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:12:58,337 INFO L129 PetriNetUnfolder]: 372/1003 cut-off events. [2021-12-07 00:12:58,337 INFO L130 PetriNetUnfolder]: For 6277/6277 co-relation queries the response was YES. [2021-12-07 00:12:58,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 1003 events. 372/1003 cut-off events. For 6277/6277 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5847 event pairs, 11 based on Foata normal form. 17/1016 useless extension candidates. Maximal degree in co-relation 4880. Up to 176 conditions per place. [2021-12-07 00:12:58,356 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 181 selfloop transitions, 410 changer transitions 10/642 dead transitions. [2021-12-07 00:12:58,356 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 642 transitions, 6816 flow [2021-12-07 00:12:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-07 00:12:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-07 00:12:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3291 transitions. [2021-12-07 00:12:58,364 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6529761904761905 [2021-12-07 00:12:58,364 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3291 transitions. [2021-12-07 00:12:58,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3291 transitions. [2021-12-07 00:12:58,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:12:58,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3291 transitions. [2021-12-07 00:12:58,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 54.85) internal successors, (3291), 60 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:58,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:58,385 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:58,386 INFO L186 Difference]: Start difference. First operand has 175 places, 226 transitions, 1755 flow. Second operand 60 states and 3291 transitions. [2021-12-07 00:12:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 642 transitions, 6816 flow [2021-12-07 00:12:58,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 642 transitions, 6266 flow, removed 250 selfloop flow, removed 17 redundant places. [2021-12-07 00:12:58,438 INFO L242 Difference]: Finished difference. Result has 232 places, 555 transitions, 5946 flow [2021-12-07 00:12:58,438 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=5946, PETRI_PLACES=232, PETRI_TRANSITIONS=555} [2021-12-07 00:12:58,439 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 158 predicate places. [2021-12-07 00:12:58,439 INFO L470 AbstractCegarLoop]: Abstraction has has 232 places, 555 transitions, 5946 flow [2021-12-07 00:12:58,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:58,440 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:12:58,440 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:12:58,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-07 00:12:58,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-07 00:12:58,643 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:12:58,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:12:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash 978440016, now seen corresponding path program 4 times [2021-12-07 00:12:58,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:12:58,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704310577] [2021-12-07 00:12:58,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:12:58,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:12:58,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:12:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:58,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:12:58,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704310577] [2021-12-07 00:12:58,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704310577] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:12:58,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132519596] [2021-12-07 00:12:58,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:12:58,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:12:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:12:58,772 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:12:58,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:12:58,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:12:58,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:12:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:12:58,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:12:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:12:59,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:12:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:12:59,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132519596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:12:59,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:12:59,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-07 00:12:59,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111119591] [2021-12-07 00:12:59,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:12:59,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:12:59,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:12:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:12:59,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:12:59,192 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:12:59,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 555 transitions, 5946 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:12:59,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:12:59,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:12:59,194 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:13:00,493 INFO L129 PetriNetUnfolder]: 850/2188 cut-off events. [2021-12-07 00:13:00,493 INFO L130 PetriNetUnfolder]: For 21298/21298 co-relation queries the response was YES. [2021-12-07 00:13:00,505 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13127 conditions, 2188 events. 850/2188 cut-off events. For 21298/21298 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15721 event pairs, 16 based on Foata normal form. 37/2218 useless extension candidates. Maximal degree in co-relation 13071. Up to 402 conditions per place. [2021-12-07 00:13:00,525 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 351 selfloop transitions, 941 changer transitions 17/1350 dead transitions. [2021-12-07 00:13:00,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1350 transitions, 18045 flow [2021-12-07 00:13:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-07 00:13:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-12-07 00:13:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2711 transitions. [2021-12-07 00:13:00,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6586491739552964 [2021-12-07 00:13:00,528 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2711 transitions. [2021-12-07 00:13:00,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2711 transitions. [2021-12-07 00:13:00,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:13:00,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2711 transitions. [2021-12-07 00:13:00,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 55.326530612244895) internal successors, (2711), 49 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,539 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 84.0) internal successors, (4200), 50 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,539 INFO L186 Difference]: Start difference. First operand has 232 places, 555 transitions, 5946 flow. Second operand 49 states and 2711 transitions. [2021-12-07 00:13:00,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1350 transitions, 18045 flow [2021-12-07 00:13:00,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1350 transitions, 16971 flow, removed 231 selfloop flow, removed 9 redundant places. [2021-12-07 00:13:00,690 INFO L242 Difference]: Finished difference. Result has 292 places, 1193 transitions, 16002 flow [2021-12-07 00:13:00,691 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=16002, PETRI_PLACES=292, PETRI_TRANSITIONS=1193} [2021-12-07 00:13:00,691 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 218 predicate places. [2021-12-07 00:13:00,691 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 1193 transitions, 16002 flow [2021-12-07 00:13:00,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:00,692 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:13:00,692 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:00,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:13:00,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:00,894 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:13:00,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:00,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2030725478, now seen corresponding path program 5 times [2021-12-07 00:13:00,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:00,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825813721] [2021-12-07 00:13:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:00,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:01,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:01,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825813721] [2021-12-07 00:13:01,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825813721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:01,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472736996] [2021-12-07 00:13:01,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:13:01,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:01,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:01,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:01,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:13:01,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:13:01,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:13:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:01,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:01,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472736996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:01,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:01,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2021-12-07 00:13:01,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122916391] [2021-12-07 00:13:01,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:01,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:13:01,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:13:01,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:13:01,515 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:13:01,516 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 1193 transitions, 16002 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:01,516 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:13:01,516 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:13:01,516 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:13:02,581 INFO L129 PetriNetUnfolder]: 967/2501 cut-off events. [2021-12-07 00:13:02,581 INFO L130 PetriNetUnfolder]: For 31893/31893 co-relation queries the response was YES. [2021-12-07 00:13:02,598 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17306 conditions, 2501 events. 967/2501 cut-off events. For 31893/31893 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18788 event pairs, 30 based on Foata normal form. 2/2492 useless extension candidates. Maximal degree in co-relation 17231. Up to 721 conditions per place. [2021-12-07 00:13:02,621 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 494 selfloop transitions, 861 changer transitions 14/1410 dead transitions. [2021-12-07 00:13:02,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1410 transitions, 21900 flow [2021-12-07 00:13:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:13:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-12-07 00:13:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1261 transitions. [2021-12-07 00:13:02,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6526915113871635 [2021-12-07 00:13:02,623 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1261 transitions. [2021-12-07 00:13:02,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1261 transitions. [2021-12-07 00:13:02,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:13:02,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1261 transitions. [2021-12-07 00:13:02,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 54.82608695652174) internal successors, (1261), 23 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:02,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 84.0) internal successors, (2016), 24 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:02,628 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 84.0) internal successors, (2016), 24 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:02,628 INFO L186 Difference]: Start difference. First operand has 292 places, 1193 transitions, 16002 flow. Second operand 23 states and 1261 transitions. [2021-12-07 00:13:02,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1410 transitions, 21900 flow [2021-12-07 00:13:02,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 1410 transitions, 21726 flow, removed 72 selfloop flow, removed 8 redundant places. [2021-12-07 00:13:02,943 INFO L242 Difference]: Finished difference. Result has 317 places, 1358 transitions, 20492 flow [2021-12-07 00:13:02,944 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=15834, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=697, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=20492, PETRI_PLACES=317, PETRI_TRANSITIONS=1358} [2021-12-07 00:13:02,945 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 243 predicate places. [2021-12-07 00:13:02,945 INFO L470 AbstractCegarLoop]: Abstraction has has 317 places, 1358 transitions, 20492 flow [2021-12-07 00:13:02,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:02,946 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:13:02,946 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:02,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:13:03,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:13:03,148 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:13:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1875149784, now seen corresponding path program 6 times [2021-12-07 00:13:03,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:03,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910171711] [2021-12-07 00:13:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:03,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:03,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:03,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910171711] [2021-12-07 00:13:03,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910171711] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:03,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547477589] [2021-12-07 00:13:03,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:13:03,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:03,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:03,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:03,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:13:03,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-07 00:13:03,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:13:03,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:03,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:13:03,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547477589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:03,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:03,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-07 00:13:03,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715321893] [2021-12-07 00:13:03,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:03,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:13:03,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:03,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:13:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:13:03,672 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:13:03,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 1358 transitions, 20492 flow. Second operand has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:03,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:13:03,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:13:03,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:13:05,904 INFO L129 PetriNetUnfolder]: 1506/3836 cut-off events. [2021-12-07 00:13:05,904 INFO L130 PetriNetUnfolder]: For 63135/63135 co-relation queries the response was YES. [2021-12-07 00:13:05,932 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29330 conditions, 3836 events. 1506/3836 cut-off events. For 63135/63135 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 31543 event pairs, 36 based on Foata normal form. 70/3893 useless extension candidates. Maximal degree in co-relation 29243. Up to 1396 conditions per place. [2021-12-07 00:13:05,964 INFO L132 encePairwiseOnDemand]: 65/84 looper letters, 1037 selfloop transitions, 1229 changer transitions 11/2318 dead transitions. [2021-12-07 00:13:05,964 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 2318 transitions, 40080 flow [2021-12-07 00:13:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-07 00:13:05,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-12-07 00:13:05,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2945 transitions. [2021-12-07 00:13:05,968 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6492504409171076 [2021-12-07 00:13:05,968 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2945 transitions. [2021-12-07 00:13:05,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2945 transitions. [2021-12-07 00:13:05,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:13:05,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2945 transitions. [2021-12-07 00:13:05,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 54.53703703703704) internal successors, (2945), 54 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:05,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 84.0) internal successors, (4620), 55 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:05,997 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 84.0) internal successors, (4620), 55 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:05,997 INFO L186 Difference]: Start difference. First operand has 317 places, 1358 transitions, 20492 flow. Second operand 54 states and 2945 transitions. [2021-12-07 00:13:05,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 2318 transitions, 40080 flow [2021-12-07 00:13:06,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 2318 transitions, 39840 flow, removed 118 selfloop flow, removed 6 redundant places. [2021-12-07 00:13:06,680 INFO L242 Difference]: Finished difference. Result has 390 places, 2202 transitions, 38727 flow [2021-12-07 00:13:06,681 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20378, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=529, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=38727, PETRI_PLACES=390, PETRI_TRANSITIONS=2202} [2021-12-07 00:13:06,681 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 316 predicate places. [2021-12-07 00:13:06,681 INFO L470 AbstractCegarLoop]: Abstraction has has 390 places, 2202 transitions, 38727 flow [2021-12-07 00:13:06,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.541666666666664) internal successors, (1285), 24 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:06,682 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:13:06,682 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:06,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:13:06,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 00:13:06,883 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:13:06,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1403488806, now seen corresponding path program 7 times [2021-12-07 00:13:06,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:06,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034972600] [2021-12-07 00:13:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:06,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:06,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034972600] [2021-12-07 00:13:06,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034972600] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66066132] [2021-12-07 00:13:06,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:13:06,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:06,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:06,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:13:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:13:07,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:07,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:07,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66066132] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:07,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:07,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2021-12-07 00:13:07,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385709843] [2021-12-07 00:13:07,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:07,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:13:07,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:07,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:13:07,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:13:07,356 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:13:07,357 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 2202 transitions, 38727 flow. Second operand has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:07,357 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:13:07,357 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:13:07,357 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:13:10,943 INFO L129 PetriNetUnfolder]: 2131/5638 cut-off events. [2021-12-07 00:13:10,943 INFO L130 PetriNetUnfolder]: For 125994/125994 co-relation queries the response was YES. [2021-12-07 00:13:11,000 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48216 conditions, 5638 events. 2131/5638 cut-off events. For 125994/125994 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 52063 event pairs, 49 based on Foata normal form. 2/5625 useless extension candidates. Maximal degree in co-relation 48103. Up to 1152 conditions per place. [2021-12-07 00:13:11,046 INFO L132 encePairwiseOnDemand]: 67/84 looper letters, 541 selfloop transitions, 2462 changer transitions 22/3066 dead transitions. [2021-12-07 00:13:11,046 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 3066 transitions, 61219 flow [2021-12-07 00:13:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:13:11,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-07 00:13:11,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1485 transitions. [2021-12-07 00:13:11,048 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2021-12-07 00:13:11,048 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1485 transitions. [2021-12-07 00:13:11,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1485 transitions. [2021-12-07 00:13:11,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:13:11,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1485 transitions. [2021-12-07 00:13:11,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 55.0) internal successors, (1485), 27 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:11,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:11,054 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:11,054 INFO L186 Difference]: Start difference. First operand has 390 places, 2202 transitions, 38727 flow. Second operand 27 states and 1485 transitions. [2021-12-07 00:13:11,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 3066 transitions, 61219 flow [2021-12-07 00:13:12,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 3066 transitions, 59802 flow, removed 686 selfloop flow, removed 10 redundant places. [2021-12-07 00:13:12,588 INFO L242 Difference]: Finished difference. Result has 416 places, 2926 transitions, 58186 flow [2021-12-07 00:13:12,590 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=38025, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1745, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=58186, PETRI_PLACES=416, PETRI_TRANSITIONS=2926} [2021-12-07 00:13:12,590 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 342 predicate places. [2021-12-07 00:13:12,590 INFO L470 AbstractCegarLoop]: Abstraction has has 416 places, 2926 transitions, 58186 flow [2021-12-07 00:13:12,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.04761904761905) internal successors, (1114), 21 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:12,591 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:13:12,591 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:12,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:13:12,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:12,792 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:13:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash -526648736, now seen corresponding path program 8 times [2021-12-07 00:13:12,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:12,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869558210] [2021-12-07 00:13:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:12,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:12,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:12,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869558210] [2021-12-07 00:13:12,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869558210] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:12,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393180792] [2021-12-07 00:13:12,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:13:12,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:12,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:12,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:12,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:13:12,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:13:12,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-07 00:13:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:13,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:13:13,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393180792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:13,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:13,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2021-12-07 00:13:13,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585401817] [2021-12-07 00:13:13,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:13,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:13:13,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:13,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:13:13,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:13:13,318 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:13:13,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 2926 transitions, 58186 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:13,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:13:13,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:13:13,319 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:13:21,548 INFO L129 PetriNetUnfolder]: 3721/9848 cut-off events. [2021-12-07 00:13:21,548 INFO L130 PetriNetUnfolder]: For 253068/253068 co-relation queries the response was YES. [2021-12-07 00:13:21,646 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90788 conditions, 9848 events. 3721/9848 cut-off events. For 253068/253068 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 99955 event pairs, 30 based on Foata normal form. 98/9939 useless extension candidates. Maximal degree in co-relation 90665. Up to 1678 conditions per place. [2021-12-07 00:13:21,716 INFO L132 encePairwiseOnDemand]: 66/84 looper letters, 1473 selfloop transitions, 3985 changer transitions 30/5529 dead transitions. [2021-12-07 00:13:21,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 5529 transitions, 122654 flow [2021-12-07 00:13:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-07 00:13:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-07 00:13:21,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3301 transitions. [2021-12-07 00:13:21,719 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6549603174603175 [2021-12-07 00:13:21,719 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3301 transitions. [2021-12-07 00:13:21,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3301 transitions. [2021-12-07 00:13:21,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:13:21,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3301 transitions. [2021-12-07 00:13:21,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 55.016666666666666) internal successors, (3301), 60 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:21,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:21,728 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:21,728 INFO L186 Difference]: Start difference. First operand has 416 places, 2926 transitions, 58186 flow. Second operand 60 states and 3301 transitions. [2021-12-07 00:13:21,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 5529 transitions, 122654 flow [2021-12-07 00:13:25,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 5529 transitions, 122068 flow, removed 291 selfloop flow, removed 5 redundant places. [2021-12-07 00:13:25,938 INFO L242 Difference]: Finished difference. Result has 501 places, 5115 transitions, 119347 flow [2021-12-07 00:13:25,941 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=57998, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2926, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=119347, PETRI_PLACES=501, PETRI_TRANSITIONS=5115} [2021-12-07 00:13:25,941 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 427 predicate places. [2021-12-07 00:13:25,941 INFO L470 AbstractCegarLoop]: Abstraction has has 501 places, 5115 transitions, 119347 flow [2021-12-07 00:13:25,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:25,942 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:13:25,942 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:25,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:13:26,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:26,143 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:13:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:26,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1016880424, now seen corresponding path program 9 times [2021-12-07 00:13:26,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:26,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314957355] [2021-12-07 00:13:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:26,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:26,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:26,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314957355] [2021-12-07 00:13:26,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314957355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:13:26,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:13:26,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-07 00:13:26,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574651994] [2021-12-07 00:13:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:13:26,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:13:26,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:13:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:13:26,247 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:13:26,247 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 5115 transitions, 119347 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:26,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:13:26,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:13:26,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:13:40,411 INFO L129 PetriNetUnfolder]: 3751/9966 cut-off events. [2021-12-07 00:13:40,411 INFO L130 PetriNetUnfolder]: For 305848/305848 co-relation queries the response was YES. [2021-12-07 00:13:40,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 104162 conditions, 9966 events. 3751/9966 cut-off events. For 305848/305848 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 101492 event pairs, 61 based on Foata normal form. 2/9956 useless extension candidates. Maximal degree in co-relation 104008. Up to 2870 conditions per place. [2021-12-07 00:13:40,605 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 1931 selfloop transitions, 3238 changer transitions 33/5243 dead transitions. [2021-12-07 00:13:40,606 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 5243 transitions, 133151 flow [2021-12-07 00:13:40,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 00:13:40,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-07 00:13:40,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1096 transitions. [2021-12-07 00:13:40,607 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6523809523809524 [2021-12-07 00:13:40,608 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1096 transitions. [2021-12-07 00:13:40,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1096 transitions. [2021-12-07 00:13:40,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:13:40,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1096 transitions. [2021-12-07 00:13:40,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 54.8) internal successors, (1096), 20 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:40,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:40,611 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:40,611 INFO L186 Difference]: Start difference. First operand has 501 places, 5115 transitions, 119347 flow. Second operand 20 states and 1096 transitions. [2021-12-07 00:13:40,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 5243 transitions, 133151 flow [2021-12-07 00:13:47,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 5243 transitions, 131822 flow, removed 442 selfloop flow, removed 11 redundant places. [2021-12-07 00:13:47,423 INFO L242 Difference]: Finished difference. Result has 514 places, 5196 transitions, 129660 flow [2021-12-07 00:13:47,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=118042, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=129660, PETRI_PLACES=514, PETRI_TRANSITIONS=5196} [2021-12-07 00:13:47,427 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 440 predicate places. [2021-12-07 00:13:47,427 INFO L470 AbstractCegarLoop]: Abstraction has has 514 places, 5196 transitions, 129660 flow [2021-12-07 00:13:47,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:47,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:13:47,427 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:13:47,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-07 00:13:47,428 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:13:47,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:13:47,428 INFO L85 PathProgramCache]: Analyzing trace with hash 263229879, now seen corresponding path program 10 times [2021-12-07 00:13:47,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:13:47,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123699598] [2021-12-07 00:13:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:13:47,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:13:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:13:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:13:47,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:13:47,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123699598] [2021-12-07 00:13:47,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123699598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:13:47,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957705346] [2021-12-07 00:13:47,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:13:47,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:13:47,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:13:47,499 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:13:47,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:13:47,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:13:47,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:13:47,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:13:47,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:13:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:47,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:13:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:13:47,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957705346] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:13:47,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:13:47,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2021-12-07 00:13:47,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996740527] [2021-12-07 00:13:47,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:13:47,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 00:13:47,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:13:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 00:13:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-12-07 00:13:47,835 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:13:47,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 5196 transitions, 129660 flow. Second operand has 26 states, 26 states have (on average 53.76923076923077) internal successors, (1398), 26 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:13:47,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:13:47,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:13:47,836 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:14:03,542 INFO L129 PetriNetUnfolder]: 3998/10645 cut-off events. [2021-12-07 00:14:03,542 INFO L130 PetriNetUnfolder]: For 376068/376068 co-relation queries the response was YES. [2021-12-07 00:14:03,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117520 conditions, 10645 events. 3998/10645 cut-off events. For 376068/376068 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 109789 event pairs, 0 based on Foata normal form. 78/10723 useless extension candidates. Maximal degree in co-relation 117361. Up to 1821 conditions per place. [2021-12-07 00:14:03,758 INFO L132 encePairwiseOnDemand]: 64/84 looper letters, 95 selfloop transitions, 5647 changer transitions 73/5856 dead transitions. [2021-12-07 00:14:03,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 5856 transitions, 157583 flow [2021-12-07 00:14:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-07 00:14:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-12-07 00:14:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3233 transitions. [2021-12-07 00:14:03,761 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641468253968254 [2021-12-07 00:14:03,761 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3233 transitions. [2021-12-07 00:14:03,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3233 transitions. [2021-12-07 00:14:03,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:14:03,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3233 transitions. [2021-12-07 00:14:03,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.88333333333333) internal successors, (3233), 60 states have internal predecessors, (3233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:03,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:03,770 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 84.0) internal successors, (5124), 61 states have internal predecessors, (5124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:03,770 INFO L186 Difference]: Start difference. First operand has 514 places, 5196 transitions, 129660 flow. Second operand 60 states and 3233 transitions. [2021-12-07 00:14:03,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 5856 transitions, 157583 flow [2021-12-07 00:14:10,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 5856 transitions, 152477 flow, removed 164 selfloop flow, removed 9 redundant places. [2021-12-07 00:14:10,938 INFO L242 Difference]: Finished difference. Result has 564 places, 5762 transitions, 152279 flow [2021-12-07 00:14:10,942 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=125118, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5068, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=152279, PETRI_PLACES=564, PETRI_TRANSITIONS=5762} [2021-12-07 00:14:10,942 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 490 predicate places. [2021-12-07 00:14:10,942 INFO L470 AbstractCegarLoop]: Abstraction has has 564 places, 5762 transitions, 152279 flow [2021-12-07 00:14:10,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 53.76923076923077) internal successors, (1398), 26 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:10,943 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:14:10,943 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:10,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:14:11,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:14:11,145 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:14:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash 169601425, now seen corresponding path program 11 times [2021-12-07 00:14:11,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:11,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093402832] [2021-12-07 00:14:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:11,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:11,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:11,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093402832] [2021-12-07 00:14:11,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093402832] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601787963] [2021-12-07 00:14:11,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:14:11,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:11,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:11,223 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:11,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:14:11,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-07 00:14:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 00:14:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:11,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:11,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601787963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:11,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:11,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-07 00:14:11,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534848122] [2021-12-07 00:14:11,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:11,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:14:11,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:11,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:14:11,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:14:11,524 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:14:11,525 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 5762 transitions, 152279 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:11,525 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:14:11,525 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:14:11,525 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:14:30,724 INFO L129 PetriNetUnfolder]: 4422/11329 cut-off events. [2021-12-07 00:14:30,724 INFO L130 PetriNetUnfolder]: For 348268/348268 co-relation queries the response was YES. [2021-12-07 00:14:30,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135092 conditions, 11329 events. 4422/11329 cut-off events. For 348268/348268 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 114783 event pairs, 14 based on Foata normal form. 27/11351 useless extension candidates. Maximal degree in co-relation 134931. Up to 5665 conditions per place. [2021-12-07 00:14:31,011 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4071 selfloop transitions, 2537 changer transitions 68/6717 dead transitions. [2021-12-07 00:14:31,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 6717 transitions, 191676 flow [2021-12-07 00:14:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-07 00:14:31,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-12-07 00:14:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1877 transitions. [2021-12-07 00:14:31,014 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6572128851540616 [2021-12-07 00:14:31,014 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1877 transitions. [2021-12-07 00:14:31,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1877 transitions. [2021-12-07 00:14:31,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:14:31,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1877 transitions. [2021-12-07 00:14:31,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.205882352941174) internal successors, (1877), 34 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:31,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:31,020 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 84.0) internal successors, (2940), 35 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:31,020 INFO L186 Difference]: Start difference. First operand has 564 places, 5762 transitions, 152279 flow. Second operand 34 states and 1877 transitions. [2021-12-07 00:14:31,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 6717 transitions, 191676 flow [2021-12-07 00:14:40,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 6717 transitions, 183900 flow, removed 1205 selfloop flow, removed 31 redundant places. [2021-12-07 00:14:41,093 INFO L242 Difference]: Finished difference. Result has 576 places, 6445 transitions, 175540 flow [2021-12-07 00:14:41,097 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=145748, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1841, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=175540, PETRI_PLACES=576, PETRI_TRANSITIONS=6445} [2021-12-07 00:14:41,097 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 502 predicate places. [2021-12-07 00:14:41,098 INFO L470 AbstractCegarLoop]: Abstraction has has 576 places, 6445 transitions, 175540 flow [2021-12-07 00:14:41,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:41,098 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:14:41,098 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:14:41,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:14:41,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:14:41,300 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:14:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:14:41,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1568924765, now seen corresponding path program 12 times [2021-12-07 00:14:41,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:14:41,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058001589] [2021-12-07 00:14:41,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:14:41,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:14:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:14:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:41,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:14:41,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058001589] [2021-12-07 00:14:41,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058001589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:14:41,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246601565] [2021-12-07 00:14:41,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:14:41,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:14:41,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:14:41,397 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:14:41,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:14:41,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-07 00:14:41,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:14:41,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:14:41,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:14:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:41,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:14:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:14:41,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246601565] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:14:41,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:14:41,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2021-12-07 00:14:41,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979241757] [2021-12-07 00:14:41,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:14:41,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:14:41,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:14:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:14:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:14:41,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:14:41,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 6445 transitions, 175540 flow. Second operand has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:14:41,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:14:41,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:14:41,725 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:15:08,217 INFO L129 PetriNetUnfolder]: 5537/13808 cut-off events. [2021-12-07 00:15:08,217 INFO L130 PetriNetUnfolder]: For 299045/299045 co-relation queries the response was YES. [2021-12-07 00:15:08,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 164460 conditions, 13808 events. 5537/13808 cut-off events. For 299045/299045 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 141947 event pairs, 18 based on Foata normal form. 17/13818 useless extension candidates. Maximal degree in co-relation 164301. Up to 6251 conditions per place. [2021-12-07 00:15:08,525 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 5059 selfloop transitions, 3155 changer transitions 45/8300 dead transitions. [2021-12-07 00:15:08,525 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 8300 transitions, 243882 flow [2021-12-07 00:15:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-07 00:15:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-12-07 00:15:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2515 transitions. [2021-12-07 00:15:08,528 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.650879917184265 [2021-12-07 00:15:08,528 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2515 transitions. [2021-12-07 00:15:08,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2515 transitions. [2021-12-07 00:15:08,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:15:08,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2515 transitions. [2021-12-07 00:15:08,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 54.67391304347826) internal successors, (2515), 46 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:08,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:08,538 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 84.0) internal successors, (3948), 47 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:08,538 INFO L186 Difference]: Start difference. First operand has 576 places, 6445 transitions, 175540 flow. Second operand 46 states and 2515 transitions. [2021-12-07 00:15:08,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 8300 transitions, 243882 flow [2021-12-07 00:15:20,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 8300 transitions, 239675 flow, removed 857 selfloop flow, removed 12 redundant places. [2021-12-07 00:15:20,755 INFO L242 Difference]: Finished difference. Result has 633 places, 7685 transitions, 220279 flow [2021-12-07 00:15:20,760 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=172021, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2040, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=220279, PETRI_PLACES=633, PETRI_TRANSITIONS=7685} [2021-12-07 00:15:20,760 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 559 predicate places. [2021-12-07 00:15:20,760 INFO L470 AbstractCegarLoop]: Abstraction has has 633 places, 7685 transitions, 220279 flow [2021-12-07 00:15:20,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:20,760 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:15:20,761 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:15:20,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:15:20,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:15:20,962 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:15:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:15:20,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1391406997, now seen corresponding path program 13 times [2021-12-07 00:15:20,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:15:20,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429795246] [2021-12-07 00:15:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:15:20,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:15:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:15:21,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:15:21,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429795246] [2021-12-07 00:15:21,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429795246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:15:21,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55943629] [2021-12-07 00:15:21,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:15:21,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:15:21,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:15:21,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:15:21,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:15:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:15:21,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 00:15:21,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:15:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:15:21,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:15:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:15:21,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55943629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:15:21,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:15:21,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-07 00:15:21,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702814370] [2021-12-07 00:15:21,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:15:21,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 00:15:21,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:15:21,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 00:15:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:15:21,358 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:15:21,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 7685 transitions, 220279 flow. Second operand has 19 states, 19 states have (on average 53.63157894736842) internal successors, (1019), 19 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:21,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:15:21,359 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:15:21,359 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:15:54,436 INFO L129 PetriNetUnfolder]: 5630/13786 cut-off events. [2021-12-07 00:15:54,436 INFO L130 PetriNetUnfolder]: For 342220/342220 co-relation queries the response was YES. [2021-12-07 00:15:54,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172940 conditions, 13786 events. 5630/13786 cut-off events. For 342220/342220 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 139799 event pairs, 16 based on Foata normal form. 2/13779 useless extension candidates. Maximal degree in co-relation 172761. Up to 7734 conditions per place. [2021-12-07 00:15:54,775 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 5871 selfloop transitions, 2219 changer transitions 10/8141 dead transitions. [2021-12-07 00:15:54,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 8141 transitions, 249487 flow [2021-12-07 00:15:54,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:15:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-12-07 00:15:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 779 transitions. [2021-12-07 00:15:54,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6624149659863946 [2021-12-07 00:15:54,777 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 779 transitions. [2021-12-07 00:15:54,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 779 transitions. [2021-12-07 00:15:54,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:15:54,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 779 transitions. [2021-12-07 00:15:54,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.642857142857146) internal successors, (779), 14 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:54,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:54,779 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 84.0) internal successors, (1260), 15 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:15:54,779 INFO L186 Difference]: Start difference. First operand has 633 places, 7685 transitions, 220279 flow. Second operand 14 states and 779 transitions. [2021-12-07 00:15:54,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 8141 transitions, 249487 flow [2021-12-07 00:16:08,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 8141 transitions, 247030 flow, removed 1096 selfloop flow, removed 11 redundant places. [2021-12-07 00:16:09,077 INFO L242 Difference]: Finished difference. Result has 642 places, 7809 transitions, 230948 flow [2021-12-07 00:16:09,083 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=217947, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2094, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=230948, PETRI_PLACES=642, PETRI_TRANSITIONS=7809} [2021-12-07 00:16:09,083 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 568 predicate places. [2021-12-07 00:16:09,083 INFO L470 AbstractCegarLoop]: Abstraction has has 642 places, 7809 transitions, 230948 flow [2021-12-07 00:16:09,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 53.63157894736842) internal successors, (1019), 19 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:09,084 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:16:09,084 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:16:09,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:16:09,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:16:09,285 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:16:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:16:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1949663241, now seen corresponding path program 14 times [2021-12-07 00:16:09,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:16:09,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733752523] [2021-12-07 00:16:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:16:09,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:16:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:16:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:16:09,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:16:09,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733752523] [2021-12-07 00:16:09,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733752523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:16:09,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564399461] [2021-12-07 00:16:09,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:16:09,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:16:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:16:09,338 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:16:09,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:16:09,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:16:09,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:16:09,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:16:09,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:16:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:16:09,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:16:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:16:09,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564399461] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:16:09,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:16:09,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2021-12-07 00:16:09,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392899708] [2021-12-07 00:16:09,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:16:09,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:16:09,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:16:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:16:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:16:09,636 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:16:09,637 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 7809 transitions, 230948 flow. Second operand has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:09,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:16:09,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:16:09,637 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:16:44,834 INFO L129 PetriNetUnfolder]: 5943/14648 cut-off events. [2021-12-07 00:16:44,834 INFO L130 PetriNetUnfolder]: For 409505/409505 co-relation queries the response was YES. [2021-12-07 00:16:45,072 INFO L84 FinitePrefix]: Finished finitePrefix Result has 187785 conditions, 14648 events. 5943/14648 cut-off events. For 409505/409505 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 151066 event pairs, 15 based on Foata normal form. 56/14697 useless extension candidates. Maximal degree in co-relation 187601. Up to 6953 conditions per place. [2021-12-07 00:16:45,233 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 5861 selfloop transitions, 2491 changer transitions 0/8393 dead transitions. [2021-12-07 00:16:45,233 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 8393 transitions, 264468 flow [2021-12-07 00:16:45,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-07 00:16:45,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-07 00:16:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1114 transitions. [2021-12-07 00:16:45,235 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6630952380952381 [2021-12-07 00:16:45,235 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1114 transitions. [2021-12-07 00:16:45,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1114 transitions. [2021-12-07 00:16:45,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:16:45,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1114 transitions. [2021-12-07 00:16:45,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 55.7) internal successors, (1114), 20 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:45,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:45,238 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:16:45,238 INFO L186 Difference]: Start difference. First operand has 642 places, 7809 transitions, 230948 flow. Second operand 20 states and 1114 transitions. [2021-12-07 00:16:45,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 8393 transitions, 264468 flow [2021-12-07 00:17:00,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 8393 transitions, 264155 flow, removed 50 selfloop flow, removed 8 redundant places. [2021-12-07 00:17:01,145 INFO L242 Difference]: Finished difference. Result has 660 places, 8176 transitions, 250848 flow [2021-12-07 00:17:01,150 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=230639, PETRI_DIFFERENCE_MINUEND_PLACES=632, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=250848, PETRI_PLACES=660, PETRI_TRANSITIONS=8176} [2021-12-07 00:17:01,151 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 586 predicate places. [2021-12-07 00:17:01,151 INFO L470 AbstractCegarLoop]: Abstraction has has 660 places, 8176 transitions, 250848 flow [2021-12-07 00:17:01,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.80952380952381) internal successors, (1130), 21 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:01,151 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:17:01,151 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:17:01,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:17:01,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:01,351 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:17:01,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:17:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 976152505, now seen corresponding path program 15 times [2021-12-07 00:17:01,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:17:01,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219026041] [2021-12-07 00:17:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:17:01,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:17:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:17:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:17:01,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:17:01,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219026041] [2021-12-07 00:17:01,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219026041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:17:01,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155515436] [2021-12-07 00:17:01,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:17:01,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:17:01,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:17:01,402 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:17:01,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:17:01,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:17:01,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:17:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:17:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:17:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:17:01,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:17:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:17:01,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155515436] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:17:01,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:17:01,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-07 00:17:01,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377180205] [2021-12-07 00:17:01,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:17:01,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:17:01,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:17:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:17:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:17:01,688 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:17:01,688 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 660 places, 8176 transitions, 250848 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:01,688 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:17:01,688 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:17:01,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:17:50,282 INFO L129 PetriNetUnfolder]: 7505/19004 cut-off events. [2021-12-07 00:17:50,282 INFO L130 PetriNetUnfolder]: For 596092/596092 co-relation queries the response was YES. [2021-12-07 00:17:50,684 INFO L84 FinitePrefix]: Finished finitePrefix Result has 247224 conditions, 19004 events. 7505/19004 cut-off events. For 596092/596092 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 208097 event pairs, 17 based on Foata normal form. 53/19051 useless extension candidates. Maximal degree in co-relation 247034. Up to 5589 conditions per place. [2021-12-07 00:17:50,869 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 4419 selfloop transitions, 6104 changer transitions 67/10631 dead transitions. [2021-12-07 00:17:50,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 697 places, 10631 transitions, 348728 flow [2021-12-07 00:17:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-07 00:17:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-12-07 00:17:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2098 transitions. [2021-12-07 00:17:50,871 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6572681704260651 [2021-12-07 00:17:50,871 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2098 transitions. [2021-12-07 00:17:50,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2098 transitions. [2021-12-07 00:17:50,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:17:50,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2098 transitions. [2021-12-07 00:17:50,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 55.21052631578947) internal successors, (2098), 38 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:50,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:50,876 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 84.0) internal successors, (3276), 39 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:17:50,876 INFO L186 Difference]: Start difference. First operand has 660 places, 8176 transitions, 250848 flow. Second operand 38 states and 2098 transitions. [2021-12-07 00:17:50,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 697 places, 10631 transitions, 348728 flow [2021-12-07 00:18:13,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 687 places, 10631 transitions, 345627 flow, removed 127 selfloop flow, removed 10 redundant places. [2021-12-07 00:18:13,739 INFO L242 Difference]: Finished difference. Result has 709 places, 10071 transitions, 332761 flow [2021-12-07 00:18:13,744 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=247803, PETRI_DIFFERENCE_MINUEND_PLACES=650, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=332761, PETRI_PLACES=709, PETRI_TRANSITIONS=10071} [2021-12-07 00:18:13,745 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 635 predicate places. [2021-12-07 00:18:13,745 INFO L470 AbstractCegarLoop]: Abstraction has has 709 places, 10071 transitions, 332761 flow [2021-12-07 00:18:13,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:13,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:18:13,745 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:18:13,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:18:13,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:13,946 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:18:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:18:13,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1867548569, now seen corresponding path program 16 times [2021-12-07 00:18:13,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:18:13,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737489200] [2021-12-07 00:18:13,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:18:13,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:18:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:18:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:18:13,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:18:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737489200] [2021-12-07 00:18:13,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737489200] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:18:13,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526109031] [2021-12-07 00:18:13,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:18:13,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:18:13,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:18:13,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:18:13,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:18:14,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:18:14,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:18:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:18:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:18:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:14,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:18:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:18:14,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526109031] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:18:14,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:18:14,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2021-12-07 00:18:14,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201094910] [2021-12-07 00:18:14,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:18:14,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:18:14,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:18:14,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:18:14,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:18:14,296 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:18:14,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 709 places, 10071 transitions, 332761 flow. Second operand has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:18:14,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:18:14,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:18:14,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:19:26,233 INFO L129 PetriNetUnfolder]: 7837/19648 cut-off events. [2021-12-07 00:19:26,234 INFO L130 PetriNetUnfolder]: For 709166/709166 co-relation queries the response was YES. [2021-12-07 00:19:26,647 INFO L84 FinitePrefix]: Finished finitePrefix Result has 273388 conditions, 19648 events. 7837/19648 cut-off events. For 709166/709166 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 215259 event pairs, 37 based on Foata normal form. 9/19642 useless extension candidates. Maximal degree in co-relation 273179. Up to 10052 conditions per place. [2021-12-07 00:19:26,841 INFO L132 encePairwiseOnDemand]: 69/84 looper letters, 7568 selfloop transitions, 3469 changer transitions 12/11090 dead transitions. [2021-12-07 00:19:26,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 11090 transitions, 387771 flow [2021-12-07 00:19:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:19:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-07 00:19:26,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1482 transitions. [2021-12-07 00:19:26,843 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6534391534391535 [2021-12-07 00:19:26,843 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1482 transitions. [2021-12-07 00:19:26,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1482 transitions. [2021-12-07 00:19:26,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:19:26,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1482 transitions. [2021-12-07 00:19:26,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 54.888888888888886) internal successors, (1482), 27 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:26,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:26,847 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:26,847 INFO L186 Difference]: Start difference. First operand has 709 places, 10071 transitions, 332761 flow. Second operand 27 states and 1482 transitions. [2021-12-07 00:19:26,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 11090 transitions, 387771 flow [2021-12-07 00:19:54,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 11090 transitions, 385062 flow, removed 1322 selfloop flow, removed 10 redundant places. [2021-12-07 00:19:55,127 INFO L242 Difference]: Finished difference. Result has 742 places, 10590 transitions, 358782 flow [2021-12-07 00:19:55,134 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=330303, PETRI_DIFFERENCE_MINUEND_PLACES=699, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2992, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=358782, PETRI_PLACES=742, PETRI_TRANSITIONS=10590} [2021-12-07 00:19:55,135 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 668 predicate places. [2021-12-07 00:19:55,135 INFO L470 AbstractCegarLoop]: Abstraction has has 742 places, 10590 transitions, 358782 flow [2021-12-07 00:19:55,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.52173913043478) internal successors, (1231), 23 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:55,135 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:19:55,135 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:19:55,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:19:55,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:19:55,337 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:19:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:19:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1245299719, now seen corresponding path program 17 times [2021-12-07 00:19:55,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:19:55,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807613831] [2021-12-07 00:19:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:19:55,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:19:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:19:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:19:55,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:19:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807613831] [2021-12-07 00:19:55,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807613831] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:19:55,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656773581] [2021-12-07 00:19:55,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:19:55,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:19:55,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:19:55,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:19:55,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:19:55,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-07 00:19:55,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:19:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-07 00:19:55,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:19:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:19:55,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:19:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:19:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656773581] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:19:55,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:19:55,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 24 [2021-12-07 00:19:55,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363235557] [2021-12-07 00:19:55,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:19:55,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 00:19:55,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:19:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 00:19:55,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-12-07 00:19:55,799 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:19:55,799 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 10590 transitions, 358782 flow. Second operand has 24 states, 24 states have (on average 53.666666666666664) internal successors, (1288), 24 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:19:55,799 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:19:55,799 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:19:55,799 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:21:10,921 INFO L129 PetriNetUnfolder]: 7869/20078 cut-off events. [2021-12-07 00:21:10,921 INFO L130 PetriNetUnfolder]: For 775021/775021 co-relation queries the response was YES. [2021-12-07 00:21:11,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 281866 conditions, 20078 events. 7869/20078 cut-off events. For 775021/775021 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 222624 event pairs, 0 based on Foata normal form. 31/20109 useless extension candidates. Maximal degree in co-relation 281640. Up to 4399 conditions per place. [2021-12-07 00:21:11,636 INFO L132 encePairwiseOnDemand]: 64/84 looper letters, 2520 selfloop transitions, 7747 changer transitions 633/10941 dead transitions. [2021-12-07 00:21:11,636 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 794 places, 10941 transitions, 391353 flow [2021-12-07 00:21:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-07 00:21:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-12-07 00:21:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2846 transitions. [2021-12-07 00:21:11,639 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6392632524707996 [2021-12-07 00:21:11,639 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2846 transitions. [2021-12-07 00:21:11,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2846 transitions. [2021-12-07 00:21:11,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:21:11,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2846 transitions. [2021-12-07 00:21:11,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 53.698113207547166) internal successors, (2846), 53 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:11,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 84.0) internal successors, (4536), 54 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:11,646 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 84.0) internal successors, (4536), 54 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:11,646 INFO L186 Difference]: Start difference. First operand has 742 places, 10590 transitions, 358782 flow. Second operand 53 states and 2846 transitions. [2021-12-07 00:21:11,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 794 places, 10941 transitions, 391353 flow [2021-12-07 00:21:41,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 788 places, 10941 transitions, 390250 flow, removed 535 selfloop flow, removed 6 redundant places. [2021-12-07 00:21:41,599 INFO L242 Difference]: Finished difference. Result has 802 places, 10273 transitions, 367406 flow [2021-12-07 00:21:41,603 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=357629, PETRI_DIFFERENCE_MINUEND_PLACES=736, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2906, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=367406, PETRI_PLACES=802, PETRI_TRANSITIONS=10273} [2021-12-07 00:21:41,603 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 728 predicate places. [2021-12-07 00:21:41,604 INFO L470 AbstractCegarLoop]: Abstraction has has 802 places, 10273 transitions, 367406 flow [2021-12-07 00:21:41,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.666666666666664) internal successors, (1288), 24 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:41,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:21:41,604 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:21:41,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 00:21:41,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:41,806 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:21:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:21:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1535571151, now seen corresponding path program 18 times [2021-12-07 00:21:41,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:21:41,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609467100] [2021-12-07 00:21:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:21:41,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:21:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:21:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:21:41,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:21:41,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609467100] [2021-12-07 00:21:41,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609467100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:21:41,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254868535] [2021-12-07 00:21:41,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 00:21:41,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:21:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:21:41,882 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:21:41,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:21:41,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-07 00:21:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:21:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:21:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:21:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:21:42,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:21:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:21:42,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254868535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:21:42,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:21:42,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-12-07 00:21:42,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682754141] [2021-12-07 00:21:42,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:21:42,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:21:42,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:21:42,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:21:42,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:21:42,209 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:21:42,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 802 places, 10273 transitions, 367406 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:21:42,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:21:42,210 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:21:42,210 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:22:50,973 INFO L129 PetriNetUnfolder]: 7771/18443 cut-off events. [2021-12-07 00:22:50,974 INFO L130 PetriNetUnfolder]: For 808444/808444 co-relation queries the response was YES. [2021-12-07 00:22:51,451 INFO L84 FinitePrefix]: Finished finitePrefix Result has 284218 conditions, 18443 events. 7771/18443 cut-off events. For 808444/808444 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 193642 event pairs, 0 based on Foata normal form. 66/18507 useless extension candidates. Maximal degree in co-relation 283977. Up to 6840 conditions per place. [2021-12-07 00:22:51,655 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 6330 selfloop transitions, 4291 changer transitions 0/10662 dead transitions. [2021-12-07 00:22:51,656 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 10662 transitions, 401724 flow [2021-12-07 00:22:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-07 00:22:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-07 00:22:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2558 transitions. [2021-12-07 00:22:51,658 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6479229989868288 [2021-12-07 00:22:51,658 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2558 transitions. [2021-12-07 00:22:51,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2558 transitions. [2021-12-07 00:22:51,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:22:51,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2558 transitions. [2021-12-07 00:22:51,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 54.42553191489362) internal successors, (2558), 47 states have internal predecessors, (2558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:22:51,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 84.0) internal successors, (4032), 48 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:22:51,664 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 84.0) internal successors, (4032), 48 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:22:51,664 INFO L186 Difference]: Start difference. First operand has 802 places, 10273 transitions, 367406 flow. Second operand 47 states and 2558 transitions. [2021-12-07 00:22:51,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 10662 transitions, 401724 flow [2021-12-07 00:23:21,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 10662 transitions, 391822 flow, removed 713 selfloop flow, removed 37 redundant places. [2021-12-07 00:23:21,452 INFO L242 Difference]: Finished difference. Result has 796 places, 10517 transitions, 381387 flow [2021-12-07 00:23:21,456 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=356477, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3996, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=381387, PETRI_PLACES=796, PETRI_TRANSITIONS=10517} [2021-12-07 00:23:21,457 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 722 predicate places. [2021-12-07 00:23:21,457 INFO L470 AbstractCegarLoop]: Abstraction has has 796 places, 10517 transitions, 381387 flow [2021-12-07 00:23:21,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:23:21,457 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:23:21,457 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:23:21,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 00:23:21,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 00:23:21,659 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:23:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:23:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1231366385, now seen corresponding path program 19 times [2021-12-07 00:23:21,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:23:21,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511813997] [2021-12-07 00:23:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:23:21,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:23:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:23:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:23:21,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:23:21,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511813997] [2021-12-07 00:23:21,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511813997] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:23:21,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570462072] [2021-12-07 00:23:21,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 00:23:21,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:23:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:23:21,746 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:23:21,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 00:23:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:23:21,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 00:23:21,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:23:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:23:21,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:23:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:23:22,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570462072] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:23:22,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:23:22,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 25 [2021-12-07 00:23:22,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080214337] [2021-12-07 00:23:22,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:23:22,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-07 00:23:22,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:23:22,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-07 00:23:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-12-07 00:23:22,098 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:23:22,099 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 10517 transitions, 381387 flow. Second operand has 25 states, 25 states have (on average 53.28) internal successors, (1332), 25 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:23:22,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:23:22,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:23:22,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-07 00:24:39,962 INFO L129 PetriNetUnfolder]: 8240/19309 cut-off events. [2021-12-07 00:24:39,962 INFO L130 PetriNetUnfolder]: For 881178/881178 co-relation queries the response was YES. [2021-12-07 00:24:40,408 INFO L84 FinitePrefix]: Finished finitePrefix Result has 304527 conditions, 19309 events. 8240/19309 cut-off events. For 881178/881178 co-relation queries the response was YES. Maximal size of possible extension queue 1117. Compared 201938 event pairs, 170 based on Foata normal form. 46/19197 useless extension candidates. Maximal degree in co-relation 304301. Up to 9974 conditions per place. [2021-12-07 00:24:40,628 INFO L132 encePairwiseOnDemand]: 68/84 looper letters, 7707 selfloop transitions, 3594 changer transitions 0/11342 dead transitions. [2021-12-07 00:24:40,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 822 places, 11342 transitions, 434485 flow [2021-12-07 00:24:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-07 00:24:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-12-07 00:24:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1483 transitions. [2021-12-07 00:24:40,629 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6538800705467372 [2021-12-07 00:24:40,630 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1483 transitions. [2021-12-07 00:24:40,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1483 transitions. [2021-12-07 00:24:40,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-07 00:24:40,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1483 transitions. [2021-12-07 00:24:40,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 54.925925925925924) internal successors, (1483), 27 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:24:40,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:24:40,633 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 84.0) internal successors, (2352), 28 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:24:40,633 INFO L186 Difference]: Start difference. First operand has 796 places, 10517 transitions, 381387 flow. Second operand 27 states and 1483 transitions. [2021-12-07 00:24:40,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 822 places, 11342 transitions, 434485 flow [2021-12-07 00:25:10,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 806 places, 11342 transitions, 432557 flow, removed 533 selfloop flow, removed 16 redundant places. [2021-12-07 00:25:10,550 INFO L242 Difference]: Finished difference. Result has 821 places, 11238 transitions, 422634 flow [2021-12-07 00:25:10,554 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=379321, PETRI_DIFFERENCE_MINUEND_PLACES=780, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2876, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=422634, PETRI_PLACES=821, PETRI_TRANSITIONS=11238} [2021-12-07 00:25:10,554 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 747 predicate places. [2021-12-07 00:25:10,555 INFO L470 AbstractCegarLoop]: Abstraction has has 821 places, 11238 transitions, 422634 flow [2021-12-07 00:25:10,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.28) internal successors, (1332), 25 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:25:10,555 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-07 00:25:10,555 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:25:10,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 00:25:10,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:25:10,758 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-07 00:25:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:25:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash 684823320, now seen corresponding path program 20 times [2021-12-07 00:25:10,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:25:10,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573947257] [2021-12-07 00:25:10,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:25:10,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:25:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:25:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:25:10,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:25:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573947257] [2021-12-07 00:25:10,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573947257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:25:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335245555] [2021-12-07 00:25:10,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:25:10,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:25:10,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:25:10,856 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:25:10,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa42f83d-7377-453e-bead-3d0ad1968110/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 00:25:10,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:25:10,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:25:10,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 00:25:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:25:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:25:11,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:25:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:25:11,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335245555] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:25:11,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:25:11,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 31 [2021-12-07 00:25:11,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115325107] [2021-12-07 00:25:11,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:25:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-07 00:25:11,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:25:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-07 00:25:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-12-07 00:25:11,327 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2021-12-07 00:25:11,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 11238 transitions, 422634 flow. Second operand has 31 states, 31 states have (on average 53.774193548387096) internal successors, (1667), 31 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:25:11,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-07 00:25:11,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2021-12-07 00:25:11,328 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand