./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU --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 1723883ecbdb95d71ea3ec2c746fab3b92c3a077cf232c2150d4112b37a05f98 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:48:09,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:48:09,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:48:09,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:48:09,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:48:09,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:48:09,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:48:09,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:48:09,923 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:48:09,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:48:09,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:48:09,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:48:09,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:48:09,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:48:09,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:48:09,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:48:09,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:48:09,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:48:09,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:48:09,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:48:09,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:48:09,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:48:09,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:48:09,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:48:09,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:48:09,961 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:48:09,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:48:09,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:48:09,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:48:09,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:48:09,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:48:09,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:48:09,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:48:09,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:48:09,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:48:09,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:48:09,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:48:09,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:48:09,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:48:09,976 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:48:09,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:48:09,979 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:48:10,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:48:10,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:48:10,014 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:48:10,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:48:10,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:48:10,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:48:10,018 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:48:10,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:48:10,019 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:48:10,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:48:10,020 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:48:10,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:48:10,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:48:10,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:48:10,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:48:10,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:48:10,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:48:10,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:48:10,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:48:10,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:48:10,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:48:10,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:48:10,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:48:10,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:48:10,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:48:10,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:48:10,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:48:10,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:48:10,029 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:48:10,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:48:10,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:48:10,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:48:10,031 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_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1723883ecbdb95d71ea3ec2c746fab3b92c3a077cf232c2150d4112b37a05f98 [2021-11-02 22:48:10,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:48:10,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:48:10,331 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:48:10,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:48:10,334 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:48:10,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/pthread/fib_safe-7.i [2021-11-02 22:48:10,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/data/7253f319d/814460bf9ca34c6392069008f2fed963/FLAG410023134 [2021-11-02 22:48:11,158 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:48:11,159 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/sv-benchmarks/c/pthread/fib_safe-7.i [2021-11-02 22:48:11,180 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/data/7253f319d/814460bf9ca34c6392069008f2fed963/FLAG410023134 [2021-11-02 22:48:11,472 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/data/7253f319d/814460bf9ca34c6392069008f2fed963 [2021-11-02 22:48:11,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:48:11,477 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:48:11,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:48:11,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:48:11,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:48:11,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:48:11" (1/1) ... [2021-11-02 22:48:11,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d49c396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:11, skipping insertion in model container [2021-11-02 22:48:11,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:48:11" (1/1) ... [2021-11-02 22:48:11,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:48:11,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:48:11,972 WARN L228 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_0fe497b8-d2c9-4cca-9015-aa791af85725/sv-benchmarks/c/pthread/fib_safe-7.i[30813,30826] [2021-11-02 22:48:11,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:48:11,989 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:48:12,067 WARN L228 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_0fe497b8-d2c9-4cca-9015-aa791af85725/sv-benchmarks/c/pthread/fib_safe-7.i[30813,30826] [2021-11-02 22:48:12,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:48:12,109 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:48:12,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12 WrapperNode [2021-11-02 22:48:12,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:48:12,111 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:48:12,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:48:12,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:48:12,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,162 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:48:12,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:48:12,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:48:12,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:48:12,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,191 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:48:12,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:48:12,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:48:12,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:48:12,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (1/1) ... [2021-11-02 22:48:12,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:48:12,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:12,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:48:12,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:48:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-02 22:48:12,288 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-02 22:48:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-02 22:48:12,289 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-02 22:48:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:48:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-02 22:48:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:48:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:48:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:48:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-02 22:48:12,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:48:12,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:48:12,292 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-02 22:48:12,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:48:12,701 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-02 22:48:12,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:48:12 BoogieIcfgContainer [2021-11-02 22:48:12,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:48:12,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:48:12,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:48:12,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:48:12,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:48:11" (1/3) ... [2021-11-02 22:48:12,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b235d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:48:12, skipping insertion in model container [2021-11-02 22:48:12,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:48:12" (2/3) ... [2021-11-02 22:48:12,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b235d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:48:12, skipping insertion in model container [2021-11-02 22:48:12,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:48:12" (3/3) ... [2021-11-02 22:48:12,740 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2021-11-02 22:48:12,746 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-02 22:48:12,746 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:48:12,747 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:48:12,747 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-02 22:48:12,781 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,781 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,782 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,782 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,782 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,783 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,783 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,783 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,784 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,785 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,785 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,786 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,786 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,786 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,787 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,787 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,787 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,788 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,788 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,788 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,789 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,789 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,789 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,790 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,790 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,791 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,791 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,791 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,792 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,792 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,792 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,793 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,793 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,794 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,794 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,798 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,799 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,799 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,799 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,800 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,806 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,806 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,807 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,807 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,807 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:48:12,810 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-02 22:48:12,870 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:48:12,878 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 [2021-11-02 22:48:12,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 22:48:12,895 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 90 transitions, 190 flow [2021-11-02 22:48:12,951 INFO L129 PetriNetUnfolder]: 7/88 cut-off events. [2021-11-02 22:48:12,952 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 22:48:12,957 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2021-11-02 22:48:12,957 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 90 transitions, 190 flow [2021-11-02 22:48:12,964 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 88 transitions, 182 flow [2021-11-02 22:48:12,997 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2021-11-02 22:48:12,998 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 22:48:12,999 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:13,000 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] [2021-11-02 22:48:13,001 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:13,011 INFO L85 PathProgramCache]: Analyzing trace with hash -2010782680, now seen corresponding path program 1 times [2021-11-02 22:48:13,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:13,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361673552] [2021-11-02 22:48:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:13,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:13,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:13,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361673552] [2021-11-02 22:48:13,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361673552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:13,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:13,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:48:13,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981306769] [2021-11-02 22:48:13,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:48:13,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:48:13,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:48:13,323 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 90 [2021-11-02 22:48:13,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 182 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-11-02 22:48:13,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:13,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 90 [2021-11-02 22:48:13,330 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:13,401 INFO L129 PetriNetUnfolder]: 3/83 cut-off events. [2021-11-02 22:48:13,402 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 22:48:13,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 3/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 4/83 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2021-11-02 22:48:13,404 INFO L132 encePairwiseOnDemand]: 86/90 looper letters, 0 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2021-11-02 22:48:13,405 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 172 flow [2021-11-02 22:48:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:48:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-02 22:48:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2021-11-02 22:48:13,426 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9666666666666667 [2021-11-02 22:48:13,428 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2021-11-02 22:48:13,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2021-11-02 22:48:13,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:13,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2021-11-02 22:48:13,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-11-02 22:48:13,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-11-02 22:48:13,454 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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) [2021-11-02 22:48:13,456 INFO L186 Difference]: Start difference. First operand has 88 places, 88 transitions, 182 flow. Second operand 2 states and 174 transitions. [2021-11-02 22:48:13,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 172 flow [2021-11-02 22:48:13,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-02 22:48:13,465 INFO L242 Difference]: Finished difference. Result has 86 places, 83 transitions, 170 flow [2021-11-02 22:48:13,467 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2021-11-02 22:48:13,468 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2021-11-02 22:48:13,469 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 170 flow [2021-11-02 22:48:13,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 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) [2021-11-02 22:48:13,469 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:13,470 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] [2021-11-02 22:48:13,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:48:13,470 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:13,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash -267972345, now seen corresponding path program 1 times [2021-11-02 22:48:13,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:13,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896186307] [2021-11-02 22:48:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:13,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:13,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:13,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896186307] [2021-11-02 22:48:13,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896186307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:13,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:13,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:48:13,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118534567] [2021-11-02 22:48:13,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:48:13,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:13,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:48:13,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:48:13,651 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 90 [2021-11-02 22:48:13,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2021-11-02 22:48:13,653 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:13,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 90 [2021-11-02 22:48:13,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:13,698 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-11-02 22:48:13,699 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 22:48:13,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 89 events. 3/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2021-11-02 22:48:13,701 INFO L132 encePairwiseOnDemand]: 87/90 looper letters, 7 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2021-11-02 22:48:13,701 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 194 flow [2021-11-02 22:48:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:48:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-02 22:48:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2021-11-02 22:48:13,705 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9148148148148149 [2021-11-02 22:48:13,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2021-11-02 22:48:13,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2021-11-02 22:48:13,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:13,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2021-11-02 22:48:13,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2021-11-02 22:48:13,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 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) [2021-11-02 22:48:13,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 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) [2021-11-02 22:48:13,712 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 170 flow. Second operand 3 states and 247 transitions. [2021-11-02 22:48:13,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 194 flow [2021-11-02 22:48:13,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-02 22:48:13,717 INFO L242 Difference]: Finished difference. Result has 89 places, 84 transitions, 182 flow [2021-11-02 22:48:13,718 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2021-11-02 22:48:13,718 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2021-11-02 22:48:13,718 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 182 flow [2021-11-02 22:48:13,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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) [2021-11-02 22:48:13,719 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:13,719 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] [2021-11-02 22:48:13,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:48:13,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2020520326, now seen corresponding path program 1 times [2021-11-02 22:48:13,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:13,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095907689] [2021-11-02 22:48:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:13,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:13,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:13,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095907689] [2021-11-02 22:48:13,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095907689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:13,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425929715] [2021-11-02 22:48:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:13,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:13,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:13,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:13,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:48:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:48:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:14,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425929715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:14,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:14,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-02 22:48:14,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219337518] [2021-11-02 22:48:14,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:48:14,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:14,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:48:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:48:14,285 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:14,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 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) [2021-11-02 22:48:14,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:14,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:14,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:14,397 INFO L129 PetriNetUnfolder]: 3/96 cut-off events. [2021-11-02 22:48:14,398 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-02 22:48:14,401 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 96 events. 3/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 121. Up to 7 conditions per place. [2021-11-02 22:48:14,403 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 10 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2021-11-02 22:48:14,403 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 226 flow [2021-11-02 22:48:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:48:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-02 22:48:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 478 transitions. [2021-11-02 22:48:14,413 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8851851851851852 [2021-11-02 22:48:14,413 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 478 transitions. [2021-11-02 22:48:14,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 478 transitions. [2021-11-02 22:48:14,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:14,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 478 transitions. [2021-11-02 22:48:14,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 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) [2021-11-02 22:48:14,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 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) [2021-11-02 22:48:14,421 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 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) [2021-11-02 22:48:14,421 INFO L186 Difference]: Start difference. First operand has 89 places, 84 transitions, 182 flow. Second operand 6 states and 478 transitions. [2021-11-02 22:48:14,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 226 flow [2021-11-02 22:48:14,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-02 22:48:14,425 INFO L242 Difference]: Finished difference. Result has 96 places, 87 transitions, 212 flow [2021-11-02 22:48:14,426 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2021-11-02 22:48:14,426 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 8 predicate places. [2021-11-02 22:48:14,426 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 212 flow [2021-11-02 22:48:14,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 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) [2021-11-02 22:48:14,427 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:14,427 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-11-02 22:48:14,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:14,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:14,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1122522151, now seen corresponding path program 2 times [2021-11-02 22:48:14,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:14,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524423556] [2021-11-02 22:48:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:14,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:14,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:14,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524423556] [2021-11-02 22:48:14,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524423556] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:14,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865646689] [2021-11-02 22:48:14,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:14,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:14,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:14,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:14,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:48:14,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:48:14,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:14,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:48:14,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:15,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865646689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:15,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:15,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-02 22:48:15,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190590974] [2021-11-02 22:48:15,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:48:15,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:48:15,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:48:15,222 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:15,224 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 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) [2021-11-02 22:48:15,224 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:15,224 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:15,224 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:15,351 INFO L129 PetriNetUnfolder]: 3/103 cut-off events. [2021-11-02 22:48:15,351 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-02 22:48:15,353 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 103 events. 3/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 148. Up to 7 conditions per place. [2021-11-02 22:48:15,354 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 11 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2021-11-02 22:48:15,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 94 transitions, 274 flow [2021-11-02 22:48:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:48:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:48:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2021-11-02 22:48:15,359 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8802469135802469 [2021-11-02 22:48:15,359 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2021-11-02 22:48:15,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2021-11-02 22:48:15,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:15,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2021-11-02 22:48:15,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 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) [2021-11-02 22:48:15,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 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) [2021-11-02 22:48:15,368 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 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) [2021-11-02 22:48:15,369 INFO L186 Difference]: Start difference. First operand has 96 places, 87 transitions, 212 flow. Second operand 9 states and 713 transitions. [2021-11-02 22:48:15,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 94 transitions, 274 flow [2021-11-02 22:48:15,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 94 transitions, 268 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-11-02 22:48:15,380 INFO L242 Difference]: Finished difference. Result has 105 places, 90 transitions, 250 flow [2021-11-02 22:48:15,381 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2021-11-02 22:48:15,381 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 17 predicate places. [2021-11-02 22:48:15,381 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 250 flow [2021-11-02 22:48:15,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 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) [2021-11-02 22:48:15,383 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:15,384 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:15,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:15,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:15,589 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:15,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1095871078, now seen corresponding path program 3 times [2021-11-02 22:48:15,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:15,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314521714] [2021-11-02 22:48:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:15,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:15,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:15,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:15,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314521714] [2021-11-02 22:48:15,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314521714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:15,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85791993] [2021-11-02 22:48:15,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:48:15,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:15,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:15,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:15,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:48:15,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 22:48:15,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:15,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:48:15,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:16,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85791993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:16,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:16,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-02 22:48:16,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876908970] [2021-11-02 22:48:16,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:48:16,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:48:16,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:48:16,133 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:16,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 250 flow. Second operand has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 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) [2021-11-02 22:48:16,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:16,136 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:16,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:16,277 INFO L129 PetriNetUnfolder]: 3/110 cut-off events. [2021-11-02 22:48:16,277 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-11-02 22:48:16,278 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 110 events. 3/110 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 179. Up to 7 conditions per place. [2021-11-02 22:48:16,279 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 12 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2021-11-02 22:48:16,280 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 98 transitions, 330 flow [2021-11-02 22:48:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:48:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-02 22:48:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2021-11-02 22:48:16,286 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8777777777777778 [2021-11-02 22:48:16,286 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 948 transitions. [2021-11-02 22:48:16,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 948 transitions. [2021-11-02 22:48:16,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:16,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 948 transitions. [2021-11-02 22:48:16,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 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) [2021-11-02 22:48:16,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 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) [2021-11-02 22:48:16,296 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 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) [2021-11-02 22:48:16,297 INFO L186 Difference]: Start difference. First operand has 105 places, 90 transitions, 250 flow. Second operand 12 states and 948 transitions. [2021-11-02 22:48:16,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 98 transitions, 330 flow [2021-11-02 22:48:16,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 98 transitions, 312 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-02 22:48:16,309 INFO L242 Difference]: Finished difference. Result has 114 places, 93 transitions, 288 flow [2021-11-02 22:48:16,312 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=288, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2021-11-02 22:48:16,312 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 26 predicate places. [2021-11-02 22:48:16,313 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 288 flow [2021-11-02 22:48:16,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 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) [2021-11-02 22:48:16,314 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:16,315 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:16,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-02 22:48:16,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:16,529 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:16,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash 541433671, now seen corresponding path program 4 times [2021-11-02 22:48:16,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:16,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496474220] [2021-11-02 22:48:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:16,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:16,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:16,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496474220] [2021-11-02 22:48:16,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496474220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:16,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647720760] [2021-11-02 22:48:16,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:48:16,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:16,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:16,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:48:16,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:48:16,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:16,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:48:16,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:18,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647720760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:18,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:18,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-11-02 22:48:18,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930771784] [2021-11-02 22:48:18,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:48:18,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:48:18,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:48:18,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-02 22:48:18,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 288 flow. Second operand has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 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) [2021-11-02 22:48:18,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:18,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-02 22:48:18,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:20,893 INFO L129 PetriNetUnfolder]: 685/1417 cut-off events. [2021-11-02 22:48:20,893 INFO L130 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2021-11-02 22:48:20,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 1417 events. 685/1417 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6691 event pairs, 2 based on Foata normal form. 7/1357 useless extension candidates. Maximal degree in co-relation 2878. Up to 342 conditions per place. [2021-11-02 22:48:20,919 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 189 selfloop transitions, 158 changer transitions 11/405 dead transitions. [2021-11-02 22:48:20,919 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 405 transitions, 1997 flow [2021-11-02 22:48:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-02 22:48:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-11-02 22:48:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4444 transitions. [2021-11-02 22:48:20,940 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6764079147640791 [2021-11-02 22:48:20,940 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4444 transitions. [2021-11-02 22:48:20,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4444 transitions. [2021-11-02 22:48:20,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:20,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4444 transitions. [2021-11-02 22:48:20,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 60.87671232876713) internal successors, (4444), 73 states have internal predecessors, (4444), 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) [2021-11-02 22:48:20,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 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) [2021-11-02 22:48:20,990 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 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) [2021-11-02 22:48:20,990 INFO L186 Difference]: Start difference. First operand has 114 places, 93 transitions, 288 flow. Second operand 73 states and 4444 transitions. [2021-11-02 22:48:20,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 405 transitions, 1997 flow [2021-11-02 22:48:21,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 405 transitions, 1883 flow, removed 28 selfloop flow, removed 8 redundant places. [2021-11-02 22:48:21,012 INFO L242 Difference]: Finished difference. Result has 216 places, 260 transitions, 1448 flow [2021-11-02 22:48:21,013 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=1448, PETRI_PLACES=216, PETRI_TRANSITIONS=260} [2021-11-02 22:48:21,014 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 128 predicate places. [2021-11-02 22:48:21,014 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 260 transitions, 1448 flow [2021-11-02 22:48:21,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 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) [2021-11-02 22:48:21,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:21,016 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:21,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:21,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:48:21,238 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:21,239 INFO L85 PathProgramCache]: Analyzing trace with hash 645980809, now seen corresponding path program 1 times [2021-11-02 22:48:21,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:21,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890964437] [2021-11-02 22:48:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:21,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:21,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:21,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890964437] [2021-11-02 22:48:21,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890964437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:21,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693212683] [2021-11-02 22:48:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:21,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:21,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:21,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:21,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:48:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:48:21,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:21,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693212683] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:21,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:21,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-02 22:48:21,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093344758] [2021-11-02 22:48:21,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:48:21,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:48:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:48:21,898 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:21,899 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 260 transitions, 1448 flow. Second operand has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 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) [2021-11-02 22:48:21,900 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:21,900 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:21,900 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:22,461 INFO L129 PetriNetUnfolder]: 365/1110 cut-off events. [2021-11-02 22:48:22,462 INFO L130 PetriNetUnfolder]: For 73499/73629 co-relation queries the response was YES. [2021-11-02 22:48:22,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8265 conditions, 1110 events. 365/1110 cut-off events. For 73499/73629 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6089 event pairs, 53 based on Foata normal form. 48/1076 useless extension candidates. Maximal degree in co-relation 8213. Up to 259 conditions per place. [2021-11-02 22:48:22,568 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 14 selfloop transitions, 56 changer transitions 0/270 dead transitions. [2021-11-02 22:48:22,568 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 270 transitions, 1666 flow [2021-11-02 22:48:22,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:48:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-02 22:48:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1418 transitions. [2021-11-02 22:48:22,572 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8753086419753087 [2021-11-02 22:48:22,572 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1418 transitions. [2021-11-02 22:48:22,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1418 transitions. [2021-11-02 22:48:22,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:22,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1418 transitions. [2021-11-02 22:48:22,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.77777777777777) internal successors, (1418), 18 states have internal predecessors, (1418), 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) [2021-11-02 22:48:22,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 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) [2021-11-02 22:48:22,582 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 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) [2021-11-02 22:48:22,582 INFO L186 Difference]: Start difference. First operand has 216 places, 260 transitions, 1448 flow. Second operand 18 states and 1418 transitions. [2021-11-02 22:48:22,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 270 transitions, 1666 flow [2021-11-02 22:48:22,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 1507 flow, removed 40 selfloop flow, removed 11 redundant places. [2021-11-02 22:48:22,742 INFO L242 Difference]: Finished difference. Result has 217 places, 263 transitions, 1471 flow [2021-11-02 22:48:22,743 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1471, PETRI_PLACES=217, PETRI_TRANSITIONS=263} [2021-11-02 22:48:22,743 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 129 predicate places. [2021-11-02 22:48:22,744 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 263 transitions, 1471 flow [2021-11-02 22:48:22,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 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) [2021-11-02 22:48:22,745 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:22,745 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:22,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:22,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:22,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1305512388, now seen corresponding path program 2 times [2021-11-02 22:48:22,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:22,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757148605] [2021-11-02 22:48:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:22,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:23,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:23,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757148605] [2021-11-02 22:48:23,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757148605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:23,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990159167] [2021-11-02 22:48:23,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:23,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:23,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:23,127 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:23,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:48:23,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:48:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:23,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 22:48:23,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:23,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990159167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:23,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:23,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-02 22:48:23,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064564039] [2021-11-02 22:48:23,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:48:23,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:48:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:48:23,650 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:23,652 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 263 transitions, 1471 flow. Second operand has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 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) [2021-11-02 22:48:23,652 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:23,653 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:23,653 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:24,266 INFO L129 PetriNetUnfolder]: 409/1187 cut-off events. [2021-11-02 22:48:24,266 INFO L130 PetriNetUnfolder]: For 84677/84820 co-relation queries the response was YES. [2021-11-02 22:48:24,307 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1187 events. 409/1187 cut-off events. For 84677/84820 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6358 event pairs, 65 based on Foata normal form. 69/1165 useless extension candidates. Maximal degree in co-relation 9420. Up to 302 conditions per place. [2021-11-02 22:48:24,346 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 15 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2021-11-02 22:48:24,346 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 274 transitions, 1707 flow [2021-11-02 22:48:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 22:48:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-02 22:48:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1653 transitions. [2021-11-02 22:48:24,351 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8746031746031746 [2021-11-02 22:48:24,351 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1653 transitions. [2021-11-02 22:48:24,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1653 transitions. [2021-11-02 22:48:24,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:24,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1653 transitions. [2021-11-02 22:48:24,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.71428571428571) internal successors, (1653), 21 states have internal predecessors, (1653), 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) [2021-11-02 22:48:24,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 states have internal predecessors, (1980), 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) [2021-11-02 22:48:24,403 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 states have internal predecessors, (1980), 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) [2021-11-02 22:48:24,404 INFO L186 Difference]: Start difference. First operand has 217 places, 263 transitions, 1471 flow. Second operand 21 states and 1653 transitions. [2021-11-02 22:48:24,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 274 transitions, 1707 flow [2021-11-02 22:48:24,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 274 transitions, 1574 flow, removed 19 selfloop flow, removed 13 redundant places. [2021-11-02 22:48:24,535 INFO L242 Difference]: Finished difference. Result has 227 places, 266 transitions, 1526 flow [2021-11-02 22:48:24,536 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1526, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2021-11-02 22:48:24,536 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 139 predicate places. [2021-11-02 22:48:24,536 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 1526 flow [2021-11-02 22:48:24,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 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) [2021-11-02 22:48:24,538 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:24,538 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:24,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:24,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-02 22:48:24,765 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:24,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1913325353, now seen corresponding path program 3 times [2021-11-02 22:48:24,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:24,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649442184] [2021-11-02 22:48:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:24,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:25,041 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:25,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:25,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649442184] [2021-11-02 22:48:25,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649442184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:25,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286214093] [2021-11-02 22:48:25,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:48:25,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:25,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:25,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:25,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:48:25,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 22:48:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:25,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 22:48:25,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:25,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286214093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:25,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:25,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-02 22:48:25,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208173822] [2021-11-02 22:48:25,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:48:25,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:25,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:48:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:48:25,847 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:25,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 1526 flow. Second operand has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 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) [2021-11-02 22:48:25,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:25,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:25,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:26,715 INFO L129 PetriNetUnfolder]: 456/1347 cut-off events. [2021-11-02 22:48:26,715 INFO L130 PetriNetUnfolder]: For 101824/101970 co-relation queries the response was YES. [2021-11-02 22:48:26,759 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11125 conditions, 1347 events. 456/1347 cut-off events. For 101824/101970 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7362 event pairs, 77 based on Foata normal form. 49/1282 useless extension candidates. Maximal degree in co-relation 11066. Up to 358 conditions per place. [2021-11-02 22:48:26,803 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 16 selfloop transitions, 62 changer transitions 0/278 dead transitions. [2021-11-02 22:48:26,803 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 278 transitions, 1780 flow [2021-11-02 22:48:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:48:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-02 22:48:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1888 transitions. [2021-11-02 22:48:26,808 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8740740740740741 [2021-11-02 22:48:26,808 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1888 transitions. [2021-11-02 22:48:26,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1888 transitions. [2021-11-02 22:48:26,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:26,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1888 transitions. [2021-11-02 22:48:26,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.66666666666667) internal successors, (1888), 24 states have internal predecessors, (1888), 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) [2021-11-02 22:48:26,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 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) [2021-11-02 22:48:26,824 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 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) [2021-11-02 22:48:26,824 INFO L186 Difference]: Start difference. First operand has 227 places, 266 transitions, 1526 flow. Second operand 24 states and 1888 transitions. [2021-11-02 22:48:26,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 278 transitions, 1780 flow [2021-11-02 22:48:26,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 278 transitions, 1624 flow, removed 22 selfloop flow, removed 17 redundant places. [2021-11-02 22:48:26,962 INFO L242 Difference]: Finished difference. Result has 236 places, 269 transitions, 1570 flow [2021-11-02 22:48:26,962 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1570, PETRI_PLACES=236, PETRI_TRANSITIONS=269} [2021-11-02 22:48:26,963 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 148 predicate places. [2021-11-02 22:48:26,963 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 269 transitions, 1570 flow [2021-11-02 22:48:26,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 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) [2021-11-02 22:48:26,964 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:26,964 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:27,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:27,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:27,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1779560740, now seen corresponding path program 4 times [2021-11-02 22:48:27,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:27,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315438609] [2021-11-02 22:48:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:27,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:27,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:27,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315438609] [2021-11-02 22:48:27,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315438609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:27,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456432692] [2021-11-02 22:48:27,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:48:27,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:27,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:27,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:27,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:48:27,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:48:27,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:48:27,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 117 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:30,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456432692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:30,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:30,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 48 [2021-11-02 22:48:30,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778154445] [2021-11-02 22:48:30,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 22:48:30,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 22:48:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 22:48:30,094 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-02 22:48:30,098 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 269 transitions, 1570 flow. Second operand has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 states have internal predecessors, (2838), 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) [2021-11-02 22:48:30,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:30,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-02 22:48:30,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:39,218 INFO L129 PetriNetUnfolder]: 1649/3544 cut-off events. [2021-11-02 22:48:39,218 INFO L130 PetriNetUnfolder]: For 310989/311405 co-relation queries the response was YES. [2021-11-02 22:48:39,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31770 conditions, 3544 events. 1649/3544 cut-off events. For 310989/311405 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 21074 event pairs, 0 based on Foata normal form. 176/3528 useless extension candidates. Maximal degree in co-relation 31708. Up to 917 conditions per place. [2021-11-02 22:48:39,351 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 343 selfloop transitions, 541 changer transitions 0/931 dead transitions. [2021-11-02 22:48:39,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 931 transitions, 14911 flow [2021-11-02 22:48:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-11-02 22:48:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-11-02 22:48:39,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 11185 transitions. [2021-11-02 22:48:39,373 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6681600955794504 [2021-11-02 22:48:39,373 INFO L72 ComplementDD]: Start complementDD. Operand 186 states and 11185 transitions. [2021-11-02 22:48:39,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 186 states and 11185 transitions. [2021-11-02 22:48:39,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:39,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 186 states and 11185 transitions. [2021-11-02 22:48:39,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 187 states, 186 states have (on average 60.134408602150536) internal successors, (11185), 186 states have internal predecessors, (11185), 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) [2021-11-02 22:48:39,446 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 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) [2021-11-02 22:48:39,453 INFO L81 ComplementDD]: Finished complementDD. Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 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) [2021-11-02 22:48:39,453 INFO L186 Difference]: Start difference. First operand has 236 places, 269 transitions, 1570 flow. Second operand 186 states and 11185 transitions. [2021-11-02 22:48:39,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 931 transitions, 14911 flow [2021-11-02 22:48:40,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 931 transitions, 14417 flow, removed 125 selfloop flow, removed 20 redundant places. [2021-11-02 22:48:40,232 INFO L242 Difference]: Finished difference. Result has 471 places, 689 transitions, 8650 flow [2021-11-02 22:48:40,233 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=186, PETRI_FLOW=8650, PETRI_PLACES=471, PETRI_TRANSITIONS=689} [2021-11-02 22:48:40,234 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-11-02 22:48:40,234 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 689 transitions, 8650 flow [2021-11-02 22:48:40,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 states have internal predecessors, (2838), 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) [2021-11-02 22:48:40,236 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:40,236 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:40,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:40,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:40,449 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:40,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:40,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1747839863, now seen corresponding path program 1 times [2021-11-02 22:48:40,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:40,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172975715] [2021-11-02 22:48:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:40,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:40,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:40,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:40,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172975715] [2021-11-02 22:48:40,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172975715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:40,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420698786] [2021-11-02 22:48:40,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:40,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:40,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:40,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:40,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:48:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:41,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 22:48:41,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:41,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420698786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:41,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:41,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-02 22:48:41,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603396908] [2021-11-02 22:48:41,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:48:41,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:41,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:48:41,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:48:41,659 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:41,662 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 689 transitions, 8650 flow. Second operand has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 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) [2021-11-02 22:48:41,662 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:41,662 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:41,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:43,761 INFO L129 PetriNetUnfolder]: 1088/2847 cut-off events. [2021-11-02 22:48:43,761 INFO L130 PetriNetUnfolder]: For 1359521/1359850 co-relation queries the response was YES. [2021-11-02 22:48:43,996 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49710 conditions, 2847 events. 1088/2847 cut-off events. For 1359521/1359850 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 17808 event pairs, 12 based on Foata normal form. 23/2687 useless extension candidates. Maximal degree in co-relation 49578. Up to 752 conditions per place. [2021-11-02 22:48:44,154 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 18 selfloop transitions, 155 changer transitions 0/703 dead transitions. [2021-11-02 22:48:44,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 703 transitions, 9146 flow [2021-11-02 22:48:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:48:44,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-02 22:48:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2358 transitions. [2021-11-02 22:48:44,165 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2021-11-02 22:48:44,165 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2358 transitions. [2021-11-02 22:48:44,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2358 transitions. [2021-11-02 22:48:44,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:44,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2358 transitions. [2021-11-02 22:48:44,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 78.6) internal successors, (2358), 30 states have internal predecessors, (2358), 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) [2021-11-02 22:48:44,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 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) [2021-11-02 22:48:44,182 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 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) [2021-11-02 22:48:44,182 INFO L186 Difference]: Start difference. First operand has 471 places, 689 transitions, 8650 flow. Second operand 30 states and 2358 transitions. [2021-11-02 22:48:44,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 703 transitions, 9146 flow [2021-11-02 22:48:47,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 703 transitions, 5138 flow, removed 1800 selfloop flow, removed 54 redundant places. [2021-11-02 22:48:47,208 INFO L242 Difference]: Finished difference. Result has 449 places, 692 transitions, 5072 flow [2021-11-02 22:48:47,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5072, PETRI_PLACES=449, PETRI_TRANSITIONS=692} [2021-11-02 22:48:47,210 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 361 predicate places. [2021-11-02 22:48:47,210 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 692 transitions, 5072 flow [2021-11-02 22:48:47,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 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) [2021-11-02 22:48:47,211 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:47,211 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:47,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:47,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:47,434 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash -366798908, now seen corresponding path program 2 times [2021-11-02 22:48:47,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:47,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242975710] [2021-11-02 22:48:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:47,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:47,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:47,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242975710] [2021-11-02 22:48:47,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242975710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:47,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099295667] [2021-11-02 22:48:47,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:47,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:47,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:47,744 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:47,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:48:48,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:48:48,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:48,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 22:48:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:48,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099295667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:48,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:48,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-11-02 22:48:48,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863633512] [2021-11-02 22:48:48,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 22:48:48,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 22:48:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:48:48,855 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:48,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 692 transitions, 5072 flow. Second operand has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 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) [2021-11-02 22:48:48,858 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:48,858 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:48,858 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:51,170 INFO L129 PetriNetUnfolder]: 1167/3083 cut-off events. [2021-11-02 22:48:51,170 INFO L130 PetriNetUnfolder]: For 1468851/1469300 co-relation queries the response was YES. [2021-11-02 22:48:51,272 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50830 conditions, 3083 events. 1167/3083 cut-off events. For 1468851/1469300 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 19336 event pairs, 23 based on Foata normal form. 21/2886 useless extension candidates. Maximal degree in co-relation 50694. Up to 693 conditions per place. [2021-11-02 22:48:51,412 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 19 selfloop transitions, 158 changer transitions 0/707 dead transitions. [2021-11-02 22:48:51,412 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 707 transitions, 5586 flow [2021-11-02 22:48:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:48:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-02 22:48:51,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2593 transitions. [2021-11-02 22:48:51,419 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8730639730639731 [2021-11-02 22:48:51,419 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2593 transitions. [2021-11-02 22:48:51,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2593 transitions. [2021-11-02 22:48:51,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:51,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2593 transitions. [2021-11-02 22:48:51,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 78.57575757575758) internal successors, (2593), 33 states have internal predecessors, (2593), 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) [2021-11-02 22:48:51,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 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) [2021-11-02 22:48:51,439 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 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) [2021-11-02 22:48:51,440 INFO L186 Difference]: Start difference. First operand has 449 places, 692 transitions, 5072 flow. Second operand 33 states and 2593 transitions. [2021-11-02 22:48:51,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 707 transitions, 5586 flow [2021-11-02 22:48:55,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 707 transitions, 5216 flow, removed 40 selfloop flow, removed 25 redundant places. [2021-11-02 22:48:55,827 INFO L242 Difference]: Finished difference. Result has 459 places, 695 transitions, 5136 flow [2021-11-02 22:48:55,829 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5136, PETRI_PLACES=459, PETRI_TRANSITIONS=695} [2021-11-02 22:48:55,829 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 371 predicate places. [2021-11-02 22:48:55,830 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 695 transitions, 5136 flow [2021-11-02 22:48:55,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 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) [2021-11-02 22:48:55,831 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:48:55,831 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:55,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:56,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:56,038 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:48:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash 522062889, now seen corresponding path program 3 times [2021-11-02 22:48:56,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:56,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417560846] [2021-11-02 22:48:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:56,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:56,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:56,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417560846] [2021-11-02 22:48:56,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417560846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:56,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681397769] [2021-11-02 22:48:56,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:48:56,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:56,369 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:56,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:48:56,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-02 22:48:56,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:48:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:48:57,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681397769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:57,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:57,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-11-02 22:48:57,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418618885] [2021-11-02 22:48:57,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 22:48:57,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:57,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 22:48:57,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-02 22:48:57,401 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:48:57,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 695 transitions, 5136 flow. Second operand has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 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) [2021-11-02 22:48:57,404 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:48:57,404 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:48:57,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:48:59,539 INFO L129 PetriNetUnfolder]: 1235/3143 cut-off events. [2021-11-02 22:48:59,539 INFO L130 PetriNetUnfolder]: For 1585288/1585819 co-relation queries the response was YES. [2021-11-02 22:48:59,654 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54782 conditions, 3143 events. 1235/3143 cut-off events. For 1585288/1585819 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 19112 event pairs, 31 based on Foata normal form. 21/2936 useless extension candidates. Maximal degree in co-relation 54643. Up to 750 conditions per place. [2021-11-02 22:48:59,759 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 20 selfloop transitions, 161 changer transitions 0/711 dead transitions. [2021-11-02 22:48:59,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 711 transitions, 5668 flow [2021-11-02 22:48:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 22:48:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-02 22:48:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2828 transitions. [2021-11-02 22:48:59,765 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8728395061728395 [2021-11-02 22:48:59,765 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2828 transitions. [2021-11-02 22:48:59,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2828 transitions. [2021-11-02 22:48:59,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:48:59,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2828 transitions. [2021-11-02 22:48:59,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.55555555555556) internal successors, (2828), 36 states have internal predecessors, (2828), 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) [2021-11-02 22:48:59,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 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) [2021-11-02 22:48:59,862 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 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) [2021-11-02 22:48:59,862 INFO L186 Difference]: Start difference. First operand has 459 places, 695 transitions, 5136 flow. Second operand 36 states and 2828 transitions. [2021-11-02 22:48:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 711 transitions, 5668 flow [2021-11-02 22:49:04,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 711 transitions, 5272 flow, removed 43 selfloop flow, removed 29 redundant places. [2021-11-02 22:49:04,114 INFO L242 Difference]: Finished difference. Result has 468 places, 698 transitions, 5186 flow [2021-11-02 22:49:04,115 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5186, PETRI_PLACES=468, PETRI_TRANSITIONS=698} [2021-11-02 22:49:04,115 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 380 predicate places. [2021-11-02 22:49:04,115 INFO L470 AbstractCegarLoop]: Abstraction has has 468 places, 698 transitions, 5186 flow [2021-11-02 22:49:04,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 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) [2021-11-02 22:49:04,116 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:49:04,116 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:04,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:04,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:49:04,333 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:49:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:04,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1609652580, now seen corresponding path program 4 times [2021-11-02 22:49:04,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:04,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283625780] [2021-11-02 22:49:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:04,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:04,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:04,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283625780] [2021-11-02 22:49:04,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283625780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:04,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375193297] [2021-11-02 22:49:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:49:04,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:04,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:04,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:04,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:49:05,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:49:05,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:49:05,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:49:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:08,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375193297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:08,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:08,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 43] total 68 [2021-11-02 22:49:08,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997262688] [2021-11-02 22:49:08,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 22:49:08,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 22:49:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=4084, Unknown=0, NotChecked=0, Total=4556 [2021-11-02 22:49:08,335 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-02 22:49:08,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 698 transitions, 5186 flow. Second operand has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 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) [2021-11-02 22:49:08,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:49:08,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-02 22:49:08,340 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:49:19,526 INFO L129 PetriNetUnfolder]: 2883/5915 cut-off events. [2021-11-02 22:49:19,526 INFO L130 PetriNetUnfolder]: For 3622519/3623964 co-relation queries the response was YES. [2021-11-02 22:49:19,772 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116319 conditions, 5915 events. 2883/5915 cut-off events. For 3622519/3623964 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 36225 event pairs, 35 based on Foata normal form. 318/5913 useless extension candidates. Maximal degree in co-relation 116177. Up to 1478 conditions per place. [2021-11-02 22:49:19,944 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 974 selfloop transitions, 555 changer transitions 0/1576 dead transitions. [2021-11-02 22:49:19,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1576 transitions, 47809 flow [2021-11-02 22:49:19,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-11-02 22:49:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-11-02 22:49:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 11750 transitions. [2021-11-02 22:49:19,964 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6695156695156695 [2021-11-02 22:49:19,964 INFO L72 ComplementDD]: Start complementDD. Operand 195 states and 11750 transitions. [2021-11-02 22:49:19,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 195 states and 11750 transitions. [2021-11-02 22:49:19,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:49:19,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 195 states and 11750 transitions. [2021-11-02 22:49:19,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 196 states, 195 states have (on average 60.256410256410255) internal successors, (11750), 195 states have internal predecessors, (11750), 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) [2021-11-02 22:49:20,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 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) [2021-11-02 22:49:20,020 INFO L81 ComplementDD]: Finished complementDD. Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 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) [2021-11-02 22:49:20,020 INFO L186 Difference]: Start difference. First operand has 468 places, 698 transitions, 5186 flow. Second operand 195 states and 11750 transitions. [2021-11-02 22:49:20,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1576 transitions, 47809 flow [2021-11-02 22:49:27,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1576 transitions, 46939 flow, removed 184 selfloop flow, removed 32 redundant places. [2021-11-02 22:49:27,686 INFO L242 Difference]: Finished difference. Result has 735 places, 1118 transitions, 22687 flow [2021-11-02 22:49:27,687 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=195, PETRI_FLOW=22687, PETRI_PLACES=735, PETRI_TRANSITIONS=1118} [2021-11-02 22:49:27,687 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 647 predicate places. [2021-11-02 22:49:27,687 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 1118 transitions, 22687 flow [2021-11-02 22:49:27,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 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) [2021-11-02 22:49:27,688 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:49:27,689 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:49:27,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-02 22:49:27,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 22:49:27,889 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:49:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash -254102967, now seen corresponding path program 5 times [2021-11-02 22:49:27,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:27,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183167273] [2021-11-02 22:49:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:27,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:28,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:28,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183167273] [2021-11-02 22:49:28,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183167273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:28,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666008248] [2021-11-02 22:49:28,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:49:28,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:28,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:28,354 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:28,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:49:29,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-02 22:49:29,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:49:29,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:49:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:29,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666008248] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:29,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:29,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-11-02 22:49:29,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726019522] [2021-11-02 22:49:29,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:49:29,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:29,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:49:29,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:49:29,541 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:49:29,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1118 transitions, 22687 flow. Second operand has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 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) [2021-11-02 22:49:29,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:49:29,545 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:49:29,545 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:49:35,296 INFO L129 PetriNetUnfolder]: 1888/4851 cut-off events. [2021-11-02 22:49:35,297 INFO L130 PetriNetUnfolder]: For 9193484/9194975 co-relation queries the response was YES. [2021-11-02 22:49:35,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158458 conditions, 4851 events. 1888/4851 cut-off events. For 9193484/9194975 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 32450 event pairs, 56 based on Foata normal form. 25/4489 useless extension candidates. Maximal degree in co-relation 158211. Up to 1252 conditions per place. [2021-11-02 22:49:35,889 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 22 selfloop transitions, 278 changer transitions 0/1136 dead transitions. [2021-11-02 22:49:35,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 1136 transitions, 23501 flow [2021-11-02 22:49:35,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 22:49:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-02 22:49:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3298 transitions. [2021-11-02 22:49:35,895 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8724867724867725 [2021-11-02 22:49:35,895 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3298 transitions. [2021-11-02 22:49:35,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3298 transitions. [2021-11-02 22:49:35,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:49:35,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3298 transitions. [2021-11-02 22:49:35,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 78.52380952380952) internal successors, (3298), 42 states have internal predecessors, (3298), 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) [2021-11-02 22:49:35,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 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) [2021-11-02 22:49:35,911 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 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) [2021-11-02 22:49:35,912 INFO L186 Difference]: Start difference. First operand has 735 places, 1118 transitions, 22687 flow. Second operand 42 states and 3298 transitions. [2021-11-02 22:49:35,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 1136 transitions, 23501 flow [2021-11-02 22:50:23,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 1136 transitions, 9151 flow, removed 7128 selfloop flow, removed 11 redundant places. [2021-11-02 22:50:23,661 INFO L242 Difference]: Finished difference. Result has 768 places, 1121 transitions, 9053 flow [2021-11-02 22:50:23,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=9053, PETRI_PLACES=768, PETRI_TRANSITIONS=1121} [2021-11-02 22:50:23,663 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 680 predicate places. [2021-11-02 22:50:23,664 INFO L470 AbstractCegarLoop]: Abstraction has has 768 places, 1121 transitions, 9053 flow [2021-11-02 22:50:23,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 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) [2021-11-02 22:50:23,665 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:50:23,666 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:23,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:23,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 22:50:23,893 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:50:23,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:23,894 INFO L85 PathProgramCache]: Analyzing trace with hash 337783618, now seen corresponding path program 6 times [2021-11-02 22:50:23,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:23,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941219727] [2021-11-02 22:50:23,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:23,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:50:24,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:24,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941219727] [2021-11-02 22:50:24,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941219727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:24,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469473291] [2021-11-02 22:50:24,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:50:24,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:24,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:24,467 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:50:25,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-02 22:50:25,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:50:25,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:50:25,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:50:25,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469473291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:25,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:25,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-11-02 22:50:25,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593138543] [2021-11-02 22:50:25,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 22:50:25,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 22:50:25,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:50:25,931 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:50:25,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1121 transitions, 9053 flow. Second operand has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 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) [2021-11-02 22:50:25,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:50:25,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:50:25,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:50:31,123 INFO L129 PetriNetUnfolder]: 1975/4877 cut-off events. [2021-11-02 22:50:31,123 INFO L130 PetriNetUnfolder]: For 9332136/9333284 co-relation queries the response was YES. [2021-11-02 22:50:31,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159480 conditions, 4877 events. 1975/4877 cut-off events. For 9332136/9333284 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 31634 event pairs, 69 based on Foata normal form. 25/4507 useless extension candidates. Maximal degree in co-relation 159229. Up to 1230 conditions per place. [2021-11-02 22:50:31,787 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 23 selfloop transitions, 281 changer transitions 0/1140 dead transitions. [2021-11-02 22:50:31,787 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 1140 transitions, 9885 flow [2021-11-02 22:50:31,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 22:50:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-02 22:50:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3533 transitions. [2021-11-02 22:50:31,792 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8723456790123457 [2021-11-02 22:50:31,792 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3533 transitions. [2021-11-02 22:50:31,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3533 transitions. [2021-11-02 22:50:31,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:50:31,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3533 transitions. [2021-11-02 22:50:31,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 78.5111111111111) internal successors, (3533), 45 states have internal predecessors, (3533), 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) [2021-11-02 22:50:31,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 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) [2021-11-02 22:50:31,807 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 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) [2021-11-02 22:50:31,808 INFO L186 Difference]: Start difference. First operand has 768 places, 1121 transitions, 9053 flow. Second operand 45 states and 3533 transitions. [2021-11-02 22:50:31,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 1140 transitions, 9885 flow [2021-11-02 22:51:26,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1140 transitions, 9230 flow, removed 58 selfloop flow, removed 37 redundant places. [2021-11-02 22:51:26,503 INFO L242 Difference]: Finished difference. Result has 778 places, 1124 transitions, 9120 flow [2021-11-02 22:51:26,505 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9120, PETRI_PLACES=778, PETRI_TRANSITIONS=1124} [2021-11-02 22:51:26,505 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 690 predicate places. [2021-11-02 22:51:26,505 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 1124 transitions, 9120 flow [2021-11-02 22:51:26,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 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) [2021-11-02 22:51:26,506 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:51:26,506 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:26,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:26,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 22:51:26,707 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:51:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:26,708 INFO L85 PathProgramCache]: Analyzing trace with hash -377637117, now seen corresponding path program 7 times [2021-11-02 22:51:26,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:26,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857251980] [2021-11-02 22:51:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:26,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:27,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:27,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857251980] [2021-11-02 22:51:27,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857251980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:27,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310831303] [2021-11-02 22:51:27,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:51:27,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:27,293 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:27,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:51:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:51:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:28,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310831303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:28,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:51:28,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-11-02 22:51:28,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343947392] [2021-11-02 22:51:28,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 22:51:28,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 22:51:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:51:28,716 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-02 22:51:28,718 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1124 transitions, 9120 flow. Second operand has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 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) [2021-11-02 22:51:28,719 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:51:28,719 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-02 22:51:28,719 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:51:33,450 INFO L129 PetriNetUnfolder]: 2022/5081 cut-off events. [2021-11-02 22:51:33,451 INFO L130 PetriNetUnfolder]: For 9842226/9843750 co-relation queries the response was YES. [2021-11-02 22:51:33,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166120 conditions, 5081 events. 2022/5081 cut-off events. For 9842226/9843750 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 33374 event pairs, 79 based on Foata normal form. 25/4668 useless extension candidates. Maximal degree in co-relation 165866. Up to 1277 conditions per place. [2021-11-02 22:51:34,138 INFO L132 encePairwiseOnDemand]: 84/90 looper letters, 21 selfloop transitions, 285 changer transitions 0/1142 dead transitions. [2021-11-02 22:51:34,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 1142 transitions, 9864 flow [2021-11-02 22:51:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-02 22:51:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-02 22:51:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3766 transitions. [2021-11-02 22:51:34,144 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8717592592592592 [2021-11-02 22:51:34,144 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3766 transitions. [2021-11-02 22:51:34,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3766 transitions. [2021-11-02 22:51:34,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:51:34,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3766 transitions. [2021-11-02 22:51:34,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 78.45833333333333) internal successors, (3766), 48 states have internal predecessors, (3766), 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) [2021-11-02 22:51:34,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 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) [2021-11-02 22:51:34,160 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 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) [2021-11-02 22:51:34,160 INFO L186 Difference]: Start difference. First operand has 778 places, 1124 transitions, 9120 flow. Second operand 48 states and 3766 transitions. [2021-11-02 22:51:34,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 1142 transitions, 9864 flow [2021-11-02 22:52:41,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1142 transitions, 9186 flow, removed 61 selfloop flow, removed 41 redundant places. [2021-11-02 22:52:41,725 INFO L242 Difference]: Finished difference. Result has 788 places, 1127 transitions, 9132 flow [2021-11-02 22:52:41,727 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8442, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=9132, PETRI_PLACES=788, PETRI_TRANSITIONS=1127} [2021-11-02 22:52:41,728 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 700 predicate places. [2021-11-02 22:52:41,728 INFO L470 AbstractCegarLoop]: Abstraction has has 788 places, 1127 transitions, 9132 flow [2021-11-02 22:52:41,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 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) [2021-11-02 22:52:41,729 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:52:41,730 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:52:41,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:52:41,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 22:52:41,945 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:52:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:52:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1909233674, now seen corresponding path program 8 times [2021-11-02 22:52:41,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:52:41,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705908427] [2021-11-02 22:52:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:52:41,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:52:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:52:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:52:45,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:52:45,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705908427] [2021-11-02 22:52:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705908427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:45,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309466964] [2021-11-02 22:52:45,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:52:45,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:52:45,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:52:45,203 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:52:45,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe497b8-d2c9-4cca-9015-aa791af85725/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:52:46,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:52:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:52:46,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:52:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:52:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 637 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:52:53,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309466964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:52:53,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:52:53,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 108 [2021-11-02 22:52:53,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157994260] [2021-11-02 22:52:53,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-02 22:52:53,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:52:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-02 22:52:53,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=10979, Unknown=0, NotChecked=0, Total=11556 [2021-11-02 22:52:53,915 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 90 [2021-11-02 22:52:53,923 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1127 transitions, 9132 flow. Second operand has 108 states, 108 states have (on average 65.16666666666667) internal successors, (7038), 108 states have internal predecessors, (7038), 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) [2021-11-02 22:52:53,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:52:53,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 90 [2021-11-02 22:52:53,924 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand