./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8 --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 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:28:28,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:28:28,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:28:28,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:28:28,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:28:28,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:28:28,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:28:28,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:28:29,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:28:29,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:28:29,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:28:29,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:28:29,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:28:29,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:28:29,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:28:29,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:28:29,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:28:29,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:28:29,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:28:29,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:28:29,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:28:29,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:28:29,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:28:29,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:28:29,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:28:29,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:28:29,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:28:29,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:28:29,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:28:29,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:28:29,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:28:29,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:28:29,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:28:29,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:28:29,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:28:29,040 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:28:29,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:28:29,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:28:29,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:28:29,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:28:29,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:28:29,046 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:28:29,073 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:28:29,073 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:28:29,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:28:29,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:28:29,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:28:29,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:28:29,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:28:29,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:28:29,077 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:28:29,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:28:29,078 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:28:29,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:28:29,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:28:29,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:28:29,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:28:29,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:28:29,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:28:29,080 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:28:29,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:28:29,080 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:28:29,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:28:29,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:28:29,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:28:29,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:28:29,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:28:29,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:28:29,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:28:29,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:28:29,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:28:29,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:28:29,083 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:28:29,083 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:28:29,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:28:29,084 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_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fcb457b1bed8494a9a3b58e82500f367f4337ac38b5a41a5dad0da896f97e40 [2022-11-16 11:28:29,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:28:29,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:28:29,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:28:29,531 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:28:29,532 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:28:29,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2022-11-16 11:28:29,635 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/data/8cdcb49f1/cfaa52c715414a98b35777b935c421ab/FLAG78c5d39ee [2022-11-16 11:28:30,437 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:28:30,438 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i [2022-11-16 11:28:30,470 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/data/8cdcb49f1/cfaa52c715414a98b35777b935c421ab/FLAG78c5d39ee [2022-11-16 11:28:30,653 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/data/8cdcb49f1/cfaa52c715414a98b35777b935c421ab [2022-11-16 11:28:30,657 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:28:30,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:28:30,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:28:30,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:28:30,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:28:30,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:28:30" (1/1) ... [2022-11-16 11:28:30,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@494fb240 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:30, skipping insertion in model container [2022-11-16 11:28:30,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:28:30" (1/1) ... [2022-11-16 11:28:30,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:28:30,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:28:31,259 WARN L229 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_cc6b8d74-a086-45bf-93f9-224f1503265f/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30451,30464] [2022-11-16 11:28:31,268 WARN L229 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_cc6b8d74-a086-45bf-93f9-224f1503265f/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30681,30694] [2022-11-16 11:28:31,283 WARN L229 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_cc6b8d74-a086-45bf-93f9-224f1503265f/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30979,30992] [2022-11-16 11:28:31,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:28:31,314 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:28:31,403 WARN L229 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_cc6b8d74-a086-45bf-93f9-224f1503265f/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30451,30464] [2022-11-16 11:28:31,405 WARN L229 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_cc6b8d74-a086-45bf-93f9-224f1503265f/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30681,30694] [2022-11-16 11:28:31,408 WARN L229 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_cc6b8d74-a086-45bf-93f9-224f1503265f/sv-benchmarks/c/pthread-deagle/circular_buffer_ok.i[30979,30992] [2022-11-16 11:28:31,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:28:31,454 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:28:31,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31 WrapperNode [2022-11-16 11:28:31,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:28:31,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:28:31,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:28:31,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:28:31,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,532 INFO L138 Inliner]: procedures = 168, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 142 [2022-11-16 11:28:31,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:28:31,533 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:28:31,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:28:31,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:28:31,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,597 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:28:31,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:28:31,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:28:31,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:28:31,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (1/1) ... [2022-11-16 11:28:31,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:28:31,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:31,660 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:28:31,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:28:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:28:31,707 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 11:28:31,708 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 11:28:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 11:28:31,708 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 11:28:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:28:31,708 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:28:31,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:28:31,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:28:31,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:28:31,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 11:28:31,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:28:31,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:28:31,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:28:31,712 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:28:31,944 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:28:31,947 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:28:32,430 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:28:32,440 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:28:32,445 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:28:32,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:28:32 BoogieIcfgContainer [2022-11-16 11:28:32,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:28:32,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:28:32,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:28:32,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:28:32,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:28:30" (1/3) ... [2022-11-16 11:28:32,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f43f41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:28:32, skipping insertion in model container [2022-11-16 11:28:32,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:28:31" (2/3) ... [2022-11-16 11:28:32,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f43f41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:28:32, skipping insertion in model container [2022-11-16 11:28:32,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:28:32" (3/3) ... [2022-11-16 11:28:32,463 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2022-11-16 11:28:32,473 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:28:32,485 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:28:32,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-11-16 11:28:32,486 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:28:32,627 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:28:32,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 158 transitions, 332 flow [2022-11-16 11:28:32,757 INFO L130 PetriNetUnfolder]: 11/156 cut-off events. [2022-11-16 11:28:32,758 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:28:32,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 156 events. 11/156 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 288 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2022-11-16 11:28:32,768 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 158 transitions, 332 flow [2022-11-16 11:28:32,803 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 146 transitions, 301 flow [2022-11-16 11:28:32,815 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:28:32,823 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c8d66ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:28:32,824 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-16 11:28:32,860 INFO L130 PetriNetUnfolder]: 5/110 cut-off events. [2022-11-16 11:28:32,860 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 11:28:32,861 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:32,862 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:32,862 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1701747932, now seen corresponding path program 1 times [2022-11-16 11:28:32,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:32,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898137751] [2022-11-16 11:28:32,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:32,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:33,123 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:33,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1520895037] [2022-11-16 11:28:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:33,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:33,135 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:33,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:28:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:33,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:28:33,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:33,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:33,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:33,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898137751] [2022-11-16 11:28:33,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:33,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520895037] [2022-11-16 11:28:33,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520895037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:33,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:33,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:28:33,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030343056] [2022-11-16 11:28:33,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:33,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:33,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:33,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:33,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:33,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 158 [2022-11-16 11:28:33,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 146 transitions, 301 flow. Second operand has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 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) [2022-11-16 11:28:33,803 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:33,803 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 158 [2022-11-16 11:28:33,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:33,997 INFO L130 PetriNetUnfolder]: 29/250 cut-off events. [2022-11-16 11:28:33,997 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 11:28:34,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 250 events. 29/250 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 889 event pairs, 8 based on Foata normal form. 21/246 useless extension candidates. Maximal degree in co-relation 240. Up to 29 conditions per place. [2022-11-16 11:28:34,010 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 18 selfloop transitions, 3 changer transitions 0/142 dead transitions. [2022-11-16 11:28:34,011 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 142 transitions, 341 flow [2022-11-16 11:28:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:28:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:28:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2022-11-16 11:28:34,040 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8892405063291139 [2022-11-16 11:28:34,041 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2022-11-16 11:28:34,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2022-11-16 11:28:34,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:34,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2022-11-16 11:28:34,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 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) [2022-11-16 11:28:34,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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) [2022-11-16 11:28:34,069 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 158.0) internal successors, (790), 5 states have internal predecessors, (790), 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) [2022-11-16 11:28:34,071 INFO L175 Difference]: Start difference. First operand has 142 places, 146 transitions, 301 flow. Second operand 4 states and 562 transitions. [2022-11-16 11:28:34,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 142 transitions, 341 flow [2022-11-16 11:28:34,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 142 transitions, 334 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:28:34,084 INFO L231 Difference]: Finished difference. Result has 137 places, 136 transitions, 282 flow [2022-11-16 11:28:34,088 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=137, PETRI_TRANSITIONS=136} [2022-11-16 11:28:34,095 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, -5 predicate places. [2022-11-16 11:28:34,095 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 136 transitions, 282 flow [2022-11-16 11:28:34,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 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) [2022-11-16 11:28:34,097 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:34,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:34,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 11:28:34,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 11:28:34,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash -613322995, now seen corresponding path program 1 times [2022-11-16 11:28:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:34,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655049087] [2022-11-16 11:28:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:35,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655049087] [2022-11-16 11:28:35,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655049087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:35,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:35,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:28:35,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878069969] [2022-11-16 11:28:35,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:35,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:28:35,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:35,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:28:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:35,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 158 [2022-11-16 11:28:35,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 136 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 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) [2022-11-16 11:28:35,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:35,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 158 [2022-11-16 11:28:35,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:35,366 INFO L130 PetriNetUnfolder]: 51/369 cut-off events. [2022-11-16 11:28:35,366 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-16 11:28:35,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 369 events. 51/369 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1420 event pairs, 10 based on Foata normal form. 2/328 useless extension candidates. Maximal degree in co-relation 266. Up to 56 conditions per place. [2022-11-16 11:28:35,370 INFO L137 encePairwiseOnDemand]: 151/158 looper letters, 19 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2022-11-16 11:28:35,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 142 transitions, 349 flow [2022-11-16 11:28:35,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:28:35,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:28:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 806 transitions. [2022-11-16 11:28:35,376 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8502109704641351 [2022-11-16 11:28:35,376 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 806 transitions. [2022-11-16 11:28:35,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 806 transitions. [2022-11-16 11:28:35,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:35,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 806 transitions. [2022-11-16 11:28:35,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.33333333333334) internal successors, (806), 6 states have internal predecessors, (806), 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) [2022-11-16 11:28:35,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 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) [2022-11-16 11:28:35,385 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 158.0) internal successors, (1106), 7 states have internal predecessors, (1106), 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) [2022-11-16 11:28:35,385 INFO L175 Difference]: Start difference. First operand has 137 places, 136 transitions, 282 flow. Second operand 6 states and 806 transitions. [2022-11-16 11:28:35,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 142 transitions, 349 flow [2022-11-16 11:28:35,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 142 transitions, 339 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:28:35,395 INFO L231 Difference]: Finished difference. Result has 140 places, 137 transitions, 296 flow [2022-11-16 11:28:35,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=140, PETRI_TRANSITIONS=137} [2022-11-16 11:28:35,397 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, -2 predicate places. [2022-11-16 11:28:35,397 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 137 transitions, 296 flow [2022-11-16 11:28:35,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.66666666666666) internal successors, (790), 6 states have internal predecessors, (790), 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) [2022-11-16 11:28:35,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:35,399 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:35,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:28:35,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:35,402 INFO L85 PathProgramCache]: Analyzing trace with hash 938874572, now seen corresponding path program 1 times [2022-11-16 11:28:35,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:35,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17721334] [2022-11-16 11:28:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:35,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:35,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:35,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710098190] [2022-11-16 11:28:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:35,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:35,494 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:35,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:28:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:28:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:35,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:35,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17721334] [2022-11-16 11:28:35,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:35,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710098190] [2022-11-16 11:28:35,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710098190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:35,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:35,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:28:35,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877665944] [2022-11-16 11:28:35,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:35,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:28:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:35,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:28:35,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:28:35,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 158 [2022-11-16 11:28:35,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 137 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 128.33333333333334) internal successors, (770), 6 states have internal predecessors, (770), 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) [2022-11-16 11:28:35,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:35,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 158 [2022-11-16 11:28:35,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:35,892 INFO L130 PetriNetUnfolder]: 54/345 cut-off events. [2022-11-16 11:28:35,892 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:28:35,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 558 conditions, 345 events. 54/345 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1199 event pairs, 11 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 233. Up to 39 conditions per place. [2022-11-16 11:28:35,897 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 28 selfloop transitions, 9 changer transitions 0/151 dead transitions. [2022-11-16 11:28:35,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 151 transitions, 408 flow [2022-11-16 11:28:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:28:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:28:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 920 transitions. [2022-11-16 11:28:35,902 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8318264014466547 [2022-11-16 11:28:35,903 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 920 transitions. [2022-11-16 11:28:35,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 920 transitions. [2022-11-16 11:28:35,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:35,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 920 transitions. [2022-11-16 11:28:35,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 131.42857142857142) internal successors, (920), 7 states have internal predecessors, (920), 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) [2022-11-16 11:28:35,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 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) [2022-11-16 11:28:35,911 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 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) [2022-11-16 11:28:35,911 INFO L175 Difference]: Start difference. First operand has 140 places, 137 transitions, 296 flow. Second operand 7 states and 920 transitions. [2022-11-16 11:28:35,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 151 transitions, 408 flow [2022-11-16 11:28:35,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 151 transitions, 400 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:28:35,920 INFO L231 Difference]: Finished difference. Result has 145 places, 142 transitions, 335 flow [2022-11-16 11:28:35,920 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=335, PETRI_PLACES=145, PETRI_TRANSITIONS=142} [2022-11-16 11:28:35,923 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 3 predicate places. [2022-11-16 11:28:35,924 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 142 transitions, 335 flow [2022-11-16 11:28:35,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 128.33333333333334) internal successors, (770), 6 states have internal predecessors, (770), 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) [2022-11-16 11:28:35,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:35,925 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:35,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:36,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:36,133 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash -100173797, now seen corresponding path program 1 times [2022-11-16 11:28:36,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:36,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595355462] [2022-11-16 11:28:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:36,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:36,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:36,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595355462] [2022-11-16 11:28:36,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595355462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:36,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:36,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504429791] [2022-11-16 11:28:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:36,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:36,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:36,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:36,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:36,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 158 [2022-11-16 11:28:36,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 142 transitions, 335 flow. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2022-11-16 11:28:36,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:36,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 158 [2022-11-16 11:28:36,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:36,566 INFO L130 PetriNetUnfolder]: 43/500 cut-off events. [2022-11-16 11:28:36,566 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-16 11:28:36,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 500 events. 43/500 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1937 event pairs, 5 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 520. Up to 36 conditions per place. [2022-11-16 11:28:36,572 INFO L137 encePairwiseOnDemand]: 154/158 looper letters, 10 selfloop transitions, 3 changer transitions 0/146 dead transitions. [2022-11-16 11:28:36,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 146 transitions, 372 flow [2022-11-16 11:28:36,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:28:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2022-11-16 11:28:36,576 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9156118143459916 [2022-11-16 11:28:36,577 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2022-11-16 11:28:36,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2022-11-16 11:28:36,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:36,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2022-11-16 11:28:36,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 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) [2022-11-16 11:28:36,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-16 11:28:36,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-16 11:28:36,582 INFO L175 Difference]: Start difference. First operand has 145 places, 142 transitions, 335 flow. Second operand 3 states and 434 transitions. [2022-11-16 11:28:36,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 146 transitions, 372 flow [2022-11-16 11:28:36,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 146 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:28:36,588 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 348 flow [2022-11-16 11:28:36,589 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=348, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2022-11-16 11:28:36,591 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 5 predicate places. [2022-11-16 11:28:36,591 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 348 flow [2022-11-16 11:28:36,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 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) [2022-11-16 11:28:36,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:36,592 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:36,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:28:36,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash -11353645, now seen corresponding path program 1 times [2022-11-16 11:28:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:36,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25583250] [2022-11-16 11:28:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:36,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:36,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:36,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684382454] [2022-11-16 11:28:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:36,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:36,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:36,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:36,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:28:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:28:36,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:37,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25583250] [2022-11-16 11:28:37,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:37,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684382454] [2022-11-16 11:28:37,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684382454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:37,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:37,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:28:37,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585706740] [2022-11-16 11:28:37,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:37,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:28:37,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:37,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:28:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:28:37,050 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 158 [2022-11-16 11:28:37,051 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 348 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 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) [2022-11-16 11:28:37,051 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:37,051 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 158 [2022-11-16 11:28:37,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:37,181 INFO L130 PetriNetUnfolder]: 40/431 cut-off events. [2022-11-16 11:28:37,181 INFO L131 PetriNetUnfolder]: For 33/36 co-relation queries the response was YES. [2022-11-16 11:28:37,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 431 events. 40/431 cut-off events. For 33/36 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1454 event pairs, 10 based on Foata normal form. 3/409 useless extension candidates. Maximal degree in co-relation 416. Up to 52 conditions per place. [2022-11-16 11:28:37,185 INFO L137 encePairwiseOnDemand]: 156/158 looper letters, 17 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2022-11-16 11:28:37,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 137 transitions, 360 flow [2022-11-16 11:28:37,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:28:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2022-11-16 11:28:37,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.879746835443038 [2022-11-16 11:28:37,188 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2022-11-16 11:28:37,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2022-11-16 11:28:37,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:37,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2022-11-16 11:28:37,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-16 11:28:37,195 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-16 11:28:37,195 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 348 flow. Second operand 3 states and 417 transitions. [2022-11-16 11:28:37,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 137 transitions, 360 flow [2022-11-16 11:28:37,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 343 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-16 11:28:37,204 INFO L231 Difference]: Finished difference. Result has 139 places, 135 transitions, 305 flow [2022-11-16 11:28:37,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=305, PETRI_PLACES=139, PETRI_TRANSITIONS=135} [2022-11-16 11:28:37,207 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, -3 predicate places. [2022-11-16 11:28:37,208 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 135 transitions, 305 flow [2022-11-16 11:28:37,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 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) [2022-11-16 11:28:37,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:37,208 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:37,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:37,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:37,415 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:37,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 521509265, now seen corresponding path program 1 times [2022-11-16 11:28:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:37,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037700686] [2022-11-16 11:28:37,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:37,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:37,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638355264] [2022-11-16 11:28:37,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:37,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:37,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:37,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:37,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:28:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:37,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:28:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:37,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:28:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:37,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:37,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037700686] [2022-11-16 11:28:37,715 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:37,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638355264] [2022-11-16 11:28:37,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638355264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:37,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:37,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:37,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893762753] [2022-11-16 11:28:37,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:37,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:37,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:37,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:37,718 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 158 [2022-11-16 11:28:37,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 135 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:37,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 158 [2022-11-16 11:28:37,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:37,828 INFO L130 PetriNetUnfolder]: 35/425 cut-off events. [2022-11-16 11:28:37,828 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-16 11:28:37,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 425 events. 35/425 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1628 event pairs, 10 based on Foata normal form. 7/412 useless extension candidates. Maximal degree in co-relation 388. Up to 42 conditions per place. [2022-11-16 11:28:37,832 INFO L137 encePairwiseOnDemand]: 154/158 looper letters, 15 selfloop transitions, 4 changer transitions 0/137 dead transitions. [2022-11-16 11:28:37,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 137 transitions, 350 flow [2022-11-16 11:28:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:28:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2022-11-16 11:28:37,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.879746835443038 [2022-11-16 11:28:37,834 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2022-11-16 11:28:37,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2022-11-16 11:28:37,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:37,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2022-11-16 11:28:37,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-16 11:28:37,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-16 11:28:37,838 INFO L175 Difference]: Start difference. First operand has 139 places, 135 transitions, 305 flow. Second operand 3 states and 417 transitions. [2022-11-16 11:28:37,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 137 transitions, 350 flow [2022-11-16 11:28:37,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 137 transitions, 348 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-16 11:28:37,842 INFO L231 Difference]: Finished difference. Result has 141 places, 135 transitions, 311 flow [2022-11-16 11:28:37,843 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=141, PETRI_TRANSITIONS=135} [2022-11-16 11:28:37,843 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, -1 predicate places. [2022-11-16 11:28:37,844 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 135 transitions, 311 flow [2022-11-16 11:28:37,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:28:37,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:37,845 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:37,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:38,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:38,051 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:38,052 INFO L85 PathProgramCache]: Analyzing trace with hash 203059889, now seen corresponding path program 1 times [2022-11-16 11:28:38,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:38,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029501197] [2022-11-16 11:28:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:38,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:38,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:38,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090626425] [2022-11-16 11:28:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:38,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:38,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:38,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:38,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:28:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:28:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:38,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:38,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:38,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029501197] [2022-11-16 11:28:38,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:38,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090626425] [2022-11-16 11:28:38,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090626425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:38,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:38,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:28:38,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464676762] [2022-11-16 11:28:38,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:38,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:28:38,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:38,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:28:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:28:38,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 158 [2022-11-16 11:28:38,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 135 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 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) [2022-11-16 11:28:38,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:38,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 158 [2022-11-16 11:28:38,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:39,140 INFO L130 PetriNetUnfolder]: 45/520 cut-off events. [2022-11-16 11:28:39,140 INFO L131 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2022-11-16 11:28:39,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 520 events. 45/520 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2198 event pairs, 13 based on Foata normal form. 0/488 useless extension candidates. Maximal degree in co-relation 485. Up to 49 conditions per place. [2022-11-16 11:28:39,144 INFO L137 encePairwiseOnDemand]: 150/158 looper letters, 27 selfloop transitions, 8 changer transitions 0/147 dead transitions. [2022-11-16 11:28:39,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 147 transitions, 415 flow [2022-11-16 11:28:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:28:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:28:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1044 transitions. [2022-11-16 11:28:39,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8259493670886076 [2022-11-16 11:28:39,149 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1044 transitions. [2022-11-16 11:28:39,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1044 transitions. [2022-11-16 11:28:39,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:39,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1044 transitions. [2022-11-16 11:28:39,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 130.5) internal successors, (1044), 8 states have internal predecessors, (1044), 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) [2022-11-16 11:28:39,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 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) [2022-11-16 11:28:39,156 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 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) [2022-11-16 11:28:39,156 INFO L175 Difference]: Start difference. First operand has 141 places, 135 transitions, 311 flow. Second operand 8 states and 1044 transitions. [2022-11-16 11:28:39,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 147 transitions, 415 flow [2022-11-16 11:28:39,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 147 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:28:39,161 INFO L231 Difference]: Finished difference. Result has 148 places, 137 transitions, 338 flow [2022-11-16 11:28:39,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=148, PETRI_TRANSITIONS=137} [2022-11-16 11:28:39,162 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 6 predicate places. [2022-11-16 11:28:39,162 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 137 transitions, 338 flow [2022-11-16 11:28:39,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 128.0) internal successors, (1024), 8 states have internal predecessors, (1024), 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) [2022-11-16 11:28:39,163 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:39,164 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:39,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:39,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:39,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:39,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:39,371 INFO L85 PathProgramCache]: Analyzing trace with hash -138252367, now seen corresponding path program 1 times [2022-11-16 11:28:39,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:39,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397761652] [2022-11-16 11:28:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:39,404 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:39,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600532606] [2022-11-16 11:28:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:39,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:39,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:39,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:39,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:28:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:39,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:28:39,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:39,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 11:28:39,923 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-16 11:28:39,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 11:28:39,972 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-16 11:28:39,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:28:40,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 11:28:40,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-11-16 11:28:40,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 11:28:40,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2022-11-16 11:28:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:41,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397761652] [2022-11-16 11:28:41,012 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:41,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600532606] [2022-11-16 11:28:41,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600532606] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:41,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:41,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 11:28:41,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786785846] [2022-11-16 11:28:41,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:41,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:28:41,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:41,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:28:41,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:28:41,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 158 [2022-11-16 11:28:41,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 137 transitions, 338 flow. Second operand has 16 states, 16 states have (on average 93.75) internal successors, (1500), 16 states have internal predecessors, (1500), 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) [2022-11-16 11:28:41,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:41,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 158 [2022-11-16 11:28:41,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:42,092 INFO L130 PetriNetUnfolder]: 885/3002 cut-off events. [2022-11-16 11:28:42,092 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-16 11:28:42,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 3002 events. 885/3002 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 21397 event pairs, 197 based on Foata normal form. 0/2782 useless extension candidates. Maximal degree in co-relation 2591. Up to 553 conditions per place. [2022-11-16 11:28:42,117 INFO L137 encePairwiseOnDemand]: 140/158 looper letters, 120 selfloop transitions, 23 changer transitions 4/230 dead transitions. [2022-11-16 11:28:42,118 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 230 transitions, 858 flow [2022-11-16 11:28:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:28:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-16 11:28:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1510 transitions. [2022-11-16 11:28:42,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6371308016877637 [2022-11-16 11:28:42,123 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1510 transitions. [2022-11-16 11:28:42,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1510 transitions. [2022-11-16 11:28:42,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:42,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1510 transitions. [2022-11-16 11:28:42,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 100.66666666666667) internal successors, (1510), 15 states have internal predecessors, (1510), 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) [2022-11-16 11:28:42,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 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) [2022-11-16 11:28:42,136 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 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) [2022-11-16 11:28:42,136 INFO L175 Difference]: Start difference. First operand has 148 places, 137 transitions, 338 flow. Second operand 15 states and 1510 transitions. [2022-11-16 11:28:42,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 230 transitions, 858 flow [2022-11-16 11:28:42,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 230 transitions, 843 flow, removed 1 selfloop flow, removed 6 redundant places. [2022-11-16 11:28:42,143 INFO L231 Difference]: Finished difference. Result has 163 places, 153 transitions, 464 flow [2022-11-16 11:28:42,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=464, PETRI_PLACES=163, PETRI_TRANSITIONS=153} [2022-11-16 11:28:42,145 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 21 predicate places. [2022-11-16 11:28:42,145 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 153 transitions, 464 flow [2022-11-16 11:28:42,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 93.75) internal successors, (1500), 16 states have internal predecessors, (1500), 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) [2022-11-16 11:28:42,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:42,147 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:42,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:42,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:28:42,354 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:42,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:42,355 INFO L85 PathProgramCache]: Analyzing trace with hash -641688439, now seen corresponding path program 1 times [2022-11-16 11:28:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:42,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125567354] [2022-11-16 11:28:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:42,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:42,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251292122] [2022-11-16 11:28:42,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:42,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:42,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:42,385 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:42,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:28:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:28:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:42,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:28:42,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:42,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125567354] [2022-11-16 11:28:42,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:42,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251292122] [2022-11-16 11:28:42,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251292122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:28:42,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:28:42,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:28:42,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317950747] [2022-11-16 11:28:42,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:28:42,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:28:42,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:42,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:28:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:28:42,610 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 158 [2022-11-16 11:28:42,610 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 153 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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) [2022-11-16 11:28:42,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:42,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 158 [2022-11-16 11:28:42,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:42,762 INFO L130 PetriNetUnfolder]: 39/483 cut-off events. [2022-11-16 11:28:42,763 INFO L131 PetriNetUnfolder]: For 123/124 co-relation queries the response was YES. [2022-11-16 11:28:42,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 483 events. 39/483 cut-off events. For 123/124 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1551 event pairs, 7 based on Foata normal form. 1/466 useless extension candidates. Maximal degree in co-relation 623. Up to 32 conditions per place. [2022-11-16 11:28:42,767 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 9 selfloop transitions, 5 changer transitions 0/151 dead transitions. [2022-11-16 11:28:42,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 151 transitions, 484 flow [2022-11-16 11:28:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:28:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:28:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2022-11-16 11:28:42,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9135021097046413 [2022-11-16 11:28:42,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2022-11-16 11:28:42,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2022-11-16 11:28:42,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:42,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2022-11-16 11:28:42,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 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) [2022-11-16 11:28:42,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-16 11:28:42,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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) [2022-11-16 11:28:42,774 INFO L175 Difference]: Start difference. First operand has 163 places, 153 transitions, 464 flow. Second operand 3 states and 433 transitions. [2022-11-16 11:28:42,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 151 transitions, 484 flow [2022-11-16 11:28:42,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 151 transitions, 465 flow, removed 3 selfloop flow, removed 6 redundant places. [2022-11-16 11:28:42,779 INFO L231 Difference]: Finished difference. Result has 161 places, 149 transitions, 450 flow [2022-11-16 11:28:42,779 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=450, PETRI_PLACES=161, PETRI_TRANSITIONS=149} [2022-11-16 11:28:42,780 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 19 predicate places. [2022-11-16 11:28:42,780 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 149 transitions, 450 flow [2022-11-16 11:28:42,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 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) [2022-11-16 11:28:42,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:42,781 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:42,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:42,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:42,987 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:42,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2119136600, now seen corresponding path program 1 times [2022-11-16 11:28:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:42,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818452467] [2022-11-16 11:28:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:42,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:43,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:43,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25601515] [2022-11-16 11:28:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:43,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:43,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:43,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:43,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:28:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:43,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:28:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:43,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:43,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818452467] [2022-11-16 11:28:43,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:43,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25601515] [2022-11-16 11:28:43,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25601515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:43,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:43,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-16 11:28:43,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371772664] [2022-11-16 11:28:43,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:43,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:28:43,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:43,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:28:43,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:28:43,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 158 [2022-11-16 11:28:43,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 149 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 137.875) internal successors, (1103), 8 states have internal predecessors, (1103), 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) [2022-11-16 11:28:43,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:43,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 158 [2022-11-16 11:28:43,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:43,699 INFO L130 PetriNetUnfolder]: 75/697 cut-off events. [2022-11-16 11:28:43,699 INFO L131 PetriNetUnfolder]: For 211/236 co-relation queries the response was YES. [2022-11-16 11:28:43,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 697 events. 75/697 cut-off events. For 211/236 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2950 event pairs, 17 based on Foata normal form. 24/703 useless extension candidates. Maximal degree in co-relation 1088. Up to 52 conditions per place. [2022-11-16 11:28:43,706 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 28 selfloop transitions, 14 changer transitions 0/171 dead transitions. [2022-11-16 11:28:43,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 171 transitions, 611 flow [2022-11-16 11:28:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:28:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:28:43,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1252 transitions. [2022-11-16 11:28:43,711 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8804500703234881 [2022-11-16 11:28:43,711 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1252 transitions. [2022-11-16 11:28:43,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1252 transitions. [2022-11-16 11:28:43,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:43,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1252 transitions. [2022-11-16 11:28:43,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 139.11111111111111) internal successors, (1252), 9 states have internal predecessors, (1252), 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) [2022-11-16 11:28:43,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 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) [2022-11-16 11:28:43,721 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 158.0) internal successors, (1580), 10 states have internal predecessors, (1580), 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) [2022-11-16 11:28:43,721 INFO L175 Difference]: Start difference. First operand has 161 places, 149 transitions, 450 flow. Second operand 9 states and 1252 transitions. [2022-11-16 11:28:43,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 171 transitions, 611 flow [2022-11-16 11:28:43,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 171 transitions, 601 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 11:28:43,727 INFO L231 Difference]: Finished difference. Result has 170 places, 157 transitions, 520 flow [2022-11-16 11:28:43,728 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=520, PETRI_PLACES=170, PETRI_TRANSITIONS=157} [2022-11-16 11:28:43,729 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 28 predicate places. [2022-11-16 11:28:43,729 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 157 transitions, 520 flow [2022-11-16 11:28:43,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 137.875) internal successors, (1103), 8 states have internal predecessors, (1103), 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) [2022-11-16 11:28:43,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:43,730 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:43,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:43,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:28:43,937 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:43,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:43,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1367938732, now seen corresponding path program 1 times [2022-11-16 11:28:43,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:43,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054522412] [2022-11-16 11:28:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:43,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:43,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:43,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018313991] [2022-11-16 11:28:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:43,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:43,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:43,971 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:43,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:28:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:44,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:28:44,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:44,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:28:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:44,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:28:44,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054522412] [2022-11-16 11:28:44,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:28:44,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018313991] [2022-11-16 11:28:44,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018313991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:28:44,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:28:44,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-16 11:28:44,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560655178] [2022-11-16 11:28:44,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:28:44,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:28:44,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:28:44,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:28:44,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:28:44,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 158 [2022-11-16 11:28:44,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 157 transitions, 520 flow. Second operand has 15 states, 15 states have (on average 137.53333333333333) internal successors, (2063), 15 states have internal predecessors, (2063), 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) [2022-11-16 11:28:44,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:28:44,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 158 [2022-11-16 11:28:44,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:28:45,294 INFO L130 PetriNetUnfolder]: 164/1534 cut-off events. [2022-11-16 11:28:45,295 INFO L131 PetriNetUnfolder]: For 663/697 co-relation queries the response was YES. [2022-11-16 11:28:45,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3070 conditions, 1534 events. 164/1534 cut-off events. For 663/697 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 9004 event pairs, 31 based on Foata normal form. 49/1535 useless extension candidates. Maximal degree in co-relation 2537. Up to 107 conditions per place. [2022-11-16 11:28:45,312 INFO L137 encePairwiseOnDemand]: 152/158 looper letters, 56 selfloop transitions, 30 changer transitions 0/215 dead transitions. [2022-11-16 11:28:45,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 215 transitions, 969 flow [2022-11-16 11:28:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:28:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:28:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2914 transitions. [2022-11-16 11:28:45,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8782399035563593 [2022-11-16 11:28:45,321 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2914 transitions. [2022-11-16 11:28:45,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2914 transitions. [2022-11-16 11:28:45,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:28:45,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2914 transitions. [2022-11-16 11:28:45,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 138.76190476190476) internal successors, (2914), 21 states have internal predecessors, (2914), 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) [2022-11-16 11:28:45,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 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) [2022-11-16 11:28:45,399 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 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) [2022-11-16 11:28:45,399 INFO L175 Difference]: Start difference. First operand has 170 places, 157 transitions, 520 flow. Second operand 21 states and 2914 transitions. [2022-11-16 11:28:45,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 215 transitions, 969 flow [2022-11-16 11:28:45,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 215 transitions, 955 flow, removed 7 selfloop flow, removed 0 redundant places. [2022-11-16 11:28:45,411 INFO L231 Difference]: Finished difference. Result has 195 places, 174 transitions, 720 flow [2022-11-16 11:28:45,411 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=720, PETRI_PLACES=195, PETRI_TRANSITIONS=174} [2022-11-16 11:28:45,412 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 53 predicate places. [2022-11-16 11:28:45,412 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 174 transitions, 720 flow [2022-11-16 11:28:45,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 137.53333333333333) internal successors, (2063), 15 states have internal predecessors, (2063), 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) [2022-11-16 11:28:45,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:28:45,414 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:28:45,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:28:45,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:28:45,622 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:28:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:28:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1285036602, now seen corresponding path program 1 times [2022-11-16 11:28:45,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:28:45,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643116795] [2022-11-16 11:28:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:28:45,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:28:45,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131915336] [2022-11-16 11:28:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:28:45,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:28:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:28:45,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:28:45,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:28:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:28:46,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:28:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:28:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:28:47,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:29:05,238 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:29:05,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:29:05,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643116795] [2022-11-16 11:29:05,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:29:05,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131915336] [2022-11-16 11:29:05,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131915336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:29:05,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:29:05,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2022-11-16 11:29:05,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351004123] [2022-11-16 11:29:05,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:29:05,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:29:05,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:29:05,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:29:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:29:05,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 158 [2022-11-16 11:29:05,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 174 transitions, 720 flow. Second operand has 22 states, 22 states have (on average 126.31818181818181) internal successors, (2779), 22 states have internal predecessors, (2779), 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) [2022-11-16 11:29:05,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:29:05,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 158 [2022-11-16 11:29:05,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:29:25,854 WARN L233 SmtUtils]: Spent 17.88s on a formula simplification. DAG size of input: 48 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:29:44,557 WARN L233 SmtUtils]: Spent 17.00s on a formula simplification. DAG size of input: 51 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:30:03,230 WARN L233 SmtUtils]: Spent 16.34s on a formula simplification. DAG size of input: 53 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:30:17,843 INFO L130 PetriNetUnfolder]: 187/2394 cut-off events. [2022-11-16 11:30:17,843 INFO L131 PetriNetUnfolder]: For 1133/1147 co-relation queries the response was YES. [2022-11-16 11:30:17,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4724 conditions, 2394 events. 187/2394 cut-off events. For 1133/1147 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 14699 event pairs, 41 based on Foata normal form. 23/2327 useless extension candidates. Maximal degree in co-relation 4655. Up to 166 conditions per place. [2022-11-16 11:30:17,869 INFO L137 encePairwiseOnDemand]: 145/158 looper letters, 45 selfloop transitions, 19 changer transitions 2/210 dead transitions. [2022-11-16 11:30:17,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 210 transitions, 997 flow [2022-11-16 11:30:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:30:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 11:30:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2421 transitions. [2022-11-16 11:30:17,876 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8064623584277149 [2022-11-16 11:30:17,876 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2421 transitions. [2022-11-16 11:30:17,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2421 transitions. [2022-11-16 11:30:17,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:30:17,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2421 transitions. [2022-11-16 11:30:17,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 127.42105263157895) internal successors, (2421), 19 states have internal predecessors, (2421), 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) [2022-11-16 11:30:17,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 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) [2022-11-16 11:30:17,895 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 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) [2022-11-16 11:30:17,895 INFO L175 Difference]: Start difference. First operand has 195 places, 174 transitions, 720 flow. Second operand 19 states and 2421 transitions. [2022-11-16 11:30:17,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 210 transitions, 997 flow [2022-11-16 11:30:17,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 210 transitions, 957 flow, removed 10 selfloop flow, removed 6 redundant places. [2022-11-16 11:30:17,911 INFO L231 Difference]: Finished difference. Result has 211 places, 183 transitions, 769 flow [2022-11-16 11:30:17,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=769, PETRI_PLACES=211, PETRI_TRANSITIONS=183} [2022-11-16 11:30:17,912 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 69 predicate places. [2022-11-16 11:30:17,913 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 183 transitions, 769 flow [2022-11-16 11:30:17,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 126.31818181818181) internal successors, (2779), 22 states have internal predecessors, (2779), 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) [2022-11-16 11:30:17,915 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:30:17,916 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:30:17,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:30:18,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:30:18,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:30:18,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:30:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1696966528, now seen corresponding path program 1 times [2022-11-16 11:30:18,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:30:18,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936132047] [2022-11-16 11:30:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:30:18,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:30:18,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1087804953] [2022-11-16 11:30:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:30:18,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:30:18,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:30:18,159 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:30:18,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:30:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:30:18,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:30:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:30:19,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2022-11-16 11:30:19,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 107 [2022-11-16 11:30:20,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-16 11:30:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:20,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:30:21,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-16 11:30:21,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:21,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 76 [2022-11-16 11:30:21,635 INFO L321 Elim1Store]: treesize reduction 50, result has 51.0 percent of original size [2022-11-16 11:30:21,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 129 [2022-11-16 11:30:21,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:30:21,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 82 [2022-11-16 11:30:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:30:49,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:30:49,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936132047] [2022-11-16 11:30:49,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:30:49,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087804953] [2022-11-16 11:30:49,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087804953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:30:49,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:30:49,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 46 [2022-11-16 11:30:49,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686580900] [2022-11-16 11:30:49,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:30:49,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:30:49,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:30:49,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:30:49,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:30:49,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 158 [2022-11-16 11:30:49,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 183 transitions, 769 flow. Second operand has 46 states, 46 states have (on average 80.34782608695652) internal successors, (3696), 46 states have internal predecessors, (3696), 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) [2022-11-16 11:30:49,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:30:49,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 158 [2022-11-16 11:30:49,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:31:59,194 WARN L233 SmtUtils]: Spent 21.12s on a formula simplification. DAG size of input: 94 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:32:08,555 WARN L233 SmtUtils]: Spent 8.38s on a formula simplification. DAG size of input: 63 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:32:27,920 WARN L233 SmtUtils]: Spent 10.68s on a formula simplification. DAG size of input: 75 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:32:35,656 WARN L233 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 55 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:32:59,541 WARN L233 SmtUtils]: Spent 13.60s on a formula simplification. DAG size of input: 77 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:33:23,945 WARN L233 SmtUtils]: Spent 17.85s on a formula simplification. DAG size of input: 79 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:33:49,200 WARN L233 SmtUtils]: Spent 23.03s on a formula simplification. DAG size of input: 77 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:34:09,540 WARN L233 SmtUtils]: Spent 18.45s on a formula simplification. DAG size of input: 79 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:34:12,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 11:34:19,603 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 99 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:34:35,184 WARN L233 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 58 DAG size of output: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:35:17,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 11:36:04,037 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 82 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:36:23,166 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 80 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:36:48,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 11:37:13,666 WARN L233 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 97 DAG size of output: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:37:31,652 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 78 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:37:54,190 WARN L233 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 88 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:38:05,066 WARN L233 SmtUtils]: Spent 10.51s on a formula simplification. DAG size of input: 66 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:38:18,831 WARN L233 SmtUtils]: Spent 12.33s on a formula simplification. DAG size of input: 98 DAG size of output: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:38:49,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 11:39:01,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 11:39:17,593 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 103 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:39:45,325 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 106 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:39:56,949 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 120 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:40:01,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 11:41:36,621 INFO L130 PetriNetUnfolder]: 23492/59473 cut-off events. [2022-11-16 11:41:36,621 INFO L131 PetriNetUnfolder]: For 88135/88145 co-relation queries the response was YES. [2022-11-16 11:41:37,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159595 conditions, 59473 events. 23492/59473 cut-off events. For 88135/88145 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 614325 event pairs, 1772 based on Foata normal form. 4/57548 useless extension candidates. Maximal degree in co-relation 155941. Up to 9148 conditions per place. [2022-11-16 11:41:37,263 INFO L137 encePairwiseOnDemand]: 122/158 looper letters, 1484 selfloop transitions, 940 changer transitions 203/2689 dead transitions. [2022-11-16 11:41:37,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 2689 transitions, 20563 flow [2022-11-16 11:41:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 242 states. [2022-11-16 11:41:37,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2022-11-16 11:41:37,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 20180 transitions. [2022-11-16 11:41:37,311 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5277748718485197 [2022-11-16 11:41:37,312 INFO L72 ComplementDD]: Start complementDD. Operand 242 states and 20180 transitions. [2022-11-16 11:41:37,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 242 states and 20180 transitions. [2022-11-16 11:41:37,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:41:37,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 242 states and 20180 transitions. [2022-11-16 11:41:37,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 243 states, 242 states have (on average 83.38842975206612) internal successors, (20180), 242 states have internal predecessors, (20180), 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) [2022-11-16 11:41:37,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 243 states, 243 states have (on average 158.0) internal successors, (38394), 243 states have internal predecessors, (38394), 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) [2022-11-16 11:41:37,460 INFO L81 ComplementDD]: Finished complementDD. Result has 243 states, 243 states have (on average 158.0) internal successors, (38394), 243 states have internal predecessors, (38394), 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) [2022-11-16 11:41:37,460 INFO L175 Difference]: Start difference. First operand has 211 places, 183 transitions, 769 flow. Second operand 242 states and 20180 transitions. [2022-11-16 11:41:37,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 2689 transitions, 20563 flow [2022-11-16 11:41:38,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 2689 transitions, 20280 flow, removed 118 selfloop flow, removed 9 redundant places. [2022-11-16 11:41:38,218 INFO L231 Difference]: Finished difference. Result has 556 places, 1272 transitions, 12349 flow [2022-11-16 11:41:38,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=242, PETRI_FLOW=12349, PETRI_PLACES=556, PETRI_TRANSITIONS=1272} [2022-11-16 11:41:38,220 INFO L288 CegarLoopForPetriNet]: 142 programPoint places, 414 predicate places. [2022-11-16 11:41:38,220 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1272 transitions, 12349 flow [2022-11-16 11:41:38,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 80.34782608695652) internal successors, (3696), 46 states have internal predecessors, (3696), 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) [2022-11-16 11:41:38,222 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:41:38,222 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:38,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:38,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:41:38,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2022-11-16 11:41:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1401025946, now seen corresponding path program 2 times [2022-11-16 11:41:38,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:41:38,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788485154] [2022-11-16 11:41:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:38,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:41:38,453 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:41:38,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173188073] [2022-11-16 11:41:38,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:41:38,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:41:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:41:38,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:41:38,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6b8d74-a086-45bf-93f9-224f1503265f/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:41:39,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:41:39,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:41:39,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-16 11:41:39,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:41,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 41 [2022-11-16 11:41:41,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 75 [2022-11-16 11:41:41,031 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 11:41:42,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-16 11:41:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:41:42,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:43,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2022-11-16 11:41:43,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:41:43,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 76 [2022-11-16 11:41:44,953 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:41:44,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 135 [2022-11-16 11:43:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:19,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:19,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788485154] [2022-11-16 11:43:19,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:43:19,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173188073] [2022-11-16 11:43:19,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173188073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:19,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:19,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 52 [2022-11-16 11:43:19,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600520132] [2022-11-16 11:43:19,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:19,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-16 11:43:19,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-16 11:43:19,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2407, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 11:43:19,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 158 [2022-11-16 11:43:19,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1272 transitions, 12349 flow. Second operand has 52 states, 52 states have (on average 80.0576923076923) internal successors, (4163), 52 states have internal predecessors, (4163), 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) [2022-11-16 11:43:19,073 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:43:19,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 158 [2022-11-16 11:43:19,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand