./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R --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 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 --- 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-38b53e6 [2022-11-25 18:28:49,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:28:49,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:28:49,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:28:49,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:28:49,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:28:49,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:28:49,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:28:49,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:28:49,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:28:49,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:28:49,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:28:49,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:28:49,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:28:49,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:28:49,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:28:49,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:28:49,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:28:49,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:28:49,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:28:49,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:28:49,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:28:49,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:28:49,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:28:49,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:28:49,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:28:49,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:28:49,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:28:49,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:28:49,637 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:28:49,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:28:49,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:28:49,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:28:49,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:28:49,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:28:49,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:28:49,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:28:49,643 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:28:49,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:28:49,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:28:49,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:28:49,647 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:28:49,673 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:28:49,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:28:49,674 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:28:49,674 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:28:49,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:28:49,675 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:28:49,676 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:28:49,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:28:49,677 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:28:49,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:28:49,677 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:28:49,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:28:49,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:28:49,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:28:49,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:28:49,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:28:49,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:28:49,680 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:28:49,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:28:49,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:28:49,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:28:49,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:28:49,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:28:49,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:28:49,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:28:49,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:28:49,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:28:49,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:28:49,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:28:49,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:28:49,683 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:28:49,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:28:49,684 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:28:49,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:28:49,684 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0307f20ae0363cc6fed70ae0937c5000167639ab486b68a523e3313ccdd28e28 [2022-11-25 18:28:49,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:28:50,005 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:28:50,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:28:50,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:28:50,010 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:28:50,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-11-25 18:28:53,234 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:28:53,434 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:28:53,435 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2022-11-25 18:28:53,443 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/data/a0d080770/3f53c13b6b57470e95adc76997dd56eb/FLAG9d1e511a1 [2022-11-25 18:28:53,460 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/data/a0d080770/3f53c13b6b57470e95adc76997dd56eb [2022-11-25 18:28:53,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:28:53,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:28:53,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:28:53,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:28:53,471 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:28:53,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b89c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53, skipping insertion in model container [2022-11-25 18:28:53,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:28:53,500 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:28:53,686 WARN L237 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_4b4dfe2b-a5f9-4624-9278-f76e6589a516/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-11-25 18:28:53,697 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:28:53,707 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:28:53,733 WARN L237 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_4b4dfe2b-a5f9-4624-9278-f76e6589a516/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-11-25 18:28:53,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:28:53,753 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:28:53,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53 WrapperNode [2022-11-25 18:28:53,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:28:53,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:28:53,755 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:28:53,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:28:53,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,797 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-11-25 18:28:53,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:28:53,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:28:53,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:28:53,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:28:53,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,829 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,833 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:28:53,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:28:53,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:28:53,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:28:53,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (1/1) ... [2022-11-25 18:28:53,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:28:53,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:53,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:28:53,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:28:53,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:28:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:28:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:28:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:28:53,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:28:53,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:28:53,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:28:53,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:28:53,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:28:53,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:28:53,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:28:53,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:28:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:28:53,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:28:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:28:53,931 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:28:54,081 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:28:54,084 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:28:54,481 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:28:54,492 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:28:54,492 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 18:28:54,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:28:54 BoogieIcfgContainer [2022-11-25 18:28:54,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:28:54,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:28:54,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:28:54,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:28:54,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:28:53" (1/3) ... [2022-11-25 18:28:54,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164efc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:28:54, skipping insertion in model container [2022-11-25 18:28:54,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:53" (2/3) ... [2022-11-25 18:28:54,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164efc3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:28:54, skipping insertion in model container [2022-11-25 18:28:54,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:28:54" (3/3) ... [2022-11-25 18:28:54,524 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2022-11-25 18:28:54,534 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:28:54,547 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:28:54,547 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:28:54,547 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:28:54,640 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:28:54,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 160 transitions, 344 flow [2022-11-25 18:28:54,777 INFO L130 PetriNetUnfolder]: 12/157 cut-off events. [2022-11-25 18:28:54,778 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:28:54,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 157 events. 12/157 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 104 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2022-11-25 18:28:54,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 160 transitions, 344 flow [2022-11-25 18:28:54,791 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 146 transitions, 310 flow [2022-11-25 18:28:54,796 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:28:54,814 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 146 transitions, 310 flow [2022-11-25 18:28:54,818 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 146 transitions, 310 flow [2022-11-25 18:28:54,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 146 transitions, 310 flow [2022-11-25 18:28:54,919 INFO L130 PetriNetUnfolder]: 12/146 cut-off events. [2022-11-25 18:28:54,920 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:28:54,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 146 events. 12/146 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 101 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2022-11-25 18:28:54,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2022-11-25 18:29:01,265 INFO L134 LiptonReduction]: Checked pairs total: 1897 [2022-11-25 18:29:01,265 INFO L136 LiptonReduction]: Total number of compositions: 142 [2022-11-25 18:29:01,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:29:01,289 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;@192b55b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:29:01,290 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:29:01,298 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-11-25 18:29:01,298 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:29:01,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:01,299 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] [2022-11-25 18:29:01,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:01,306 INFO L85 PathProgramCache]: Analyzing trace with hash -494035295, now seen corresponding path program 1 times [2022-11-25 18:29:01,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:01,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861889405] [2022-11-25 18:29:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:01,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:02,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861889405] [2022-11-25 18:29:02,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861889405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:02,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:02,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:29:02,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667251716] [2022-11-25 18:29:02,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:02,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:02,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:02,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:02,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:29:02,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 302 [2022-11-25 18:29:02,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:02,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:02,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 302 [2022-11-25 18:29:02,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:02,604 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2022-11-25 18:29:02,605 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-11-25 18:29:02,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1605 event pairs, 39 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-11-25 18:29:02,616 INFO L137 encePairwiseOnDemand]: 297/302 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2022-11-25 18:29:02,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2022-11-25 18:29:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:29:02,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:29:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2022-11-25 18:29:02,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5121412803532008 [2022-11-25 18:29:02,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2022-11-25 18:29:02,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2022-11-25 18:29:02,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:02,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2022-11-25 18:29:02,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:02,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:02,684 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:02,686 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 464 transitions. [2022-11-25 18:29:02,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2022-11-25 18:29:02,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:29:02,693 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2022-11-25 18:29:02,696 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2022-11-25 18:29:02,700 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2022-11-25 18:29:02,701 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2022-11-25 18:29:02,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:02,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:02,702 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] [2022-11-25 18:29:02,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:29:02,704 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:02,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1427858880, now seen corresponding path program 1 times [2022-11-25 18:29:02,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:02,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644719459] [2022-11-25 18:29:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:02,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:02,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:02,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644719459] [2022-11-25 18:29:02,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644719459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:02,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:02,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:29:02,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356579728] [2022-11-25 18:29:02,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:02,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:29:02,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:02,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:29:02,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:29:03,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 302 [2022-11-25 18:29:03,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:03,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 302 [2022-11-25 18:29:03,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:03,312 INFO L130 PetriNetUnfolder]: 615/923 cut-off events. [2022-11-25 18:29:03,312 INFO L131 PetriNetUnfolder]: For 260/260 co-relation queries the response was YES. [2022-11-25 18:29:03,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2253 conditions, 923 events. 615/923 cut-off events. For 260/260 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3894 event pairs, 190 based on Foata normal form. 34/955 useless extension candidates. Maximal degree in co-relation 488. Up to 476 conditions per place. [2022-11-25 18:29:03,319 INFO L137 encePairwiseOnDemand]: 297/302 looper letters, 54 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2022-11-25 18:29:03,320 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2022-11-25 18:29:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:29:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:29:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 722 transitions. [2022-11-25 18:29:03,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4781456953642384 [2022-11-25 18:29:03,323 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 722 transitions. [2022-11-25 18:29:03,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 722 transitions. [2022-11-25 18:29:03,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:03,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 722 transitions. [2022-11-25 18:29:03,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,332 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,333 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 722 transitions. [2022-11-25 18:29:03,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2022-11-25 18:29:03,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:29:03,337 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 106 flow [2022-11-25 18:29:03,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2022-11-25 18:29:03,338 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2022-11-25 18:29:03,338 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 106 flow [2022-11-25 18:29:03,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:03,340 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] [2022-11-25 18:29:03,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:29:03,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:03,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash -379815812, now seen corresponding path program 1 times [2022-11-25 18:29:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:03,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940150844] [2022-11-25 18:29:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:03,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:03,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:03,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940150844] [2022-11-25 18:29:03,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940150844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:03,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:03,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:29:03,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64760770] [2022-11-25 18:29:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:03,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:29:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:29:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:29:03,724 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 302 [2022-11-25 18:29:03,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,726 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:03,726 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 302 [2022-11-25 18:29:03,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:03,989 INFO L130 PetriNetUnfolder]: 481/749 cut-off events. [2022-11-25 18:29:03,989 INFO L131 PetriNetUnfolder]: For 360/390 co-relation queries the response was YES. [2022-11-25 18:29:03,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 749 events. 481/749 cut-off events. For 360/390 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3216 event pairs, 199 based on Foata normal form. 58/805 useless extension candidates. Maximal degree in co-relation 1233. Up to 486 conditions per place. [2022-11-25 18:29:03,995 INFO L137 encePairwiseOnDemand]: 297/302 looper letters, 50 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2022-11-25 18:29:03,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 286 flow [2022-11-25 18:29:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:29:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:29:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 720 transitions. [2022-11-25 18:29:03,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4768211920529801 [2022-11-25 18:29:03,998 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 720 transitions. [2022-11-25 18:29:03,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 720 transitions. [2022-11-25 18:29:03,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:03,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 720 transitions. [2022-11-25 18:29:04,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,006 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,006 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 106 flow. Second operand 5 states and 720 transitions. [2022-11-25 18:29:04,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 286 flow [2022-11-25 18:29:04,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 282 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:29:04,009 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 121 flow [2022-11-25 18:29:04,010 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2022-11-25 18:29:04,010 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2022-11-25 18:29:04,011 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 121 flow [2022-11-25 18:29:04,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,011 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:04,012 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] [2022-11-25 18:29:04,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:29:04,012 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:04,013 INFO L85 PathProgramCache]: Analyzing trace with hash -52562800, now seen corresponding path program 1 times [2022-11-25 18:29:04,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:04,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582233267] [2022-11-25 18:29:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:04,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:04,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:04,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582233267] [2022-11-25 18:29:04,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582233267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:04,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:04,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:29:04,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858304382] [2022-11-25 18:29:04,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:04,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:29:04,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:04,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:29:04,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:29:04,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 302 [2022-11-25 18:29:04,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:04,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 302 [2022-11-25 18:29:04,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:04,448 INFO L130 PetriNetUnfolder]: 419/637 cut-off events. [2022-11-25 18:29:04,448 INFO L131 PetriNetUnfolder]: For 470/506 co-relation queries the response was YES. [2022-11-25 18:29:04,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1640 conditions, 637 events. 419/637 cut-off events. For 470/506 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2547 event pairs, 140 based on Foata normal form. 50/675 useless extension candidates. Maximal degree in co-relation 1378. Up to 371 conditions per place. [2022-11-25 18:29:04,453 INFO L137 encePairwiseOnDemand]: 296/302 looper letters, 34 selfloop transitions, 3 changer transitions 25/64 dead transitions. [2022-11-25 18:29:04,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 333 flow [2022-11-25 18:29:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:29:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:29:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 854 transitions. [2022-11-25 18:29:04,457 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47130242825607066 [2022-11-25 18:29:04,457 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 854 transitions. [2022-11-25 18:29:04,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 854 transitions. [2022-11-25 18:29:04,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:04,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 854 transitions. [2022-11-25 18:29:04,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 142.33333333333334) internal successors, (854), 6 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,465 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,465 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 121 flow. Second operand 6 states and 854 transitions. [2022-11-25 18:29:04,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 333 flow [2022-11-25 18:29:04,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 320 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-25 18:29:04,470 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 102 flow [2022-11-25 18:29:04,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2022-11-25 18:29:04,471 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2022-11-25 18:29:04,471 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 102 flow [2022-11-25 18:29:04,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.8) internal successors, (684), 5 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:04,472 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] [2022-11-25 18:29:04,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:29:04,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1124107204, now seen corresponding path program 1 times [2022-11-25 18:29:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:04,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860268497] [2022-11-25 18:29:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:04,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:04,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860268497] [2022-11-25 18:29:04,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860268497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105898096] [2022-11-25 18:29:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:04,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:04,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:04,674 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:04,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:29:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:29:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:05,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:05,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105898096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:05,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:05,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 18:29:05,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145553612] [2022-11-25 18:29:05,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:05,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:29:05,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:29:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:29:05,394 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 302 [2022-11-25 18:29:05,396 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 130.0) internal successors, (1690), 13 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:05,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 302 [2022-11-25 18:29:05,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:05,702 INFO L130 PetriNetUnfolder]: 544/799 cut-off events. [2022-11-25 18:29:05,702 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2022-11-25 18:29:05,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 799 events. 544/799 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3027 event pairs, 139 based on Foata normal form. 16/812 useless extension candidates. Maximal degree in co-relation 2121. Up to 410 conditions per place. [2022-11-25 18:29:05,709 INFO L137 encePairwiseOnDemand]: 294/302 looper letters, 58 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2022-11-25 18:29:05,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 372 flow [2022-11-25 18:29:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:29:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:29:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 948 transitions. [2022-11-25 18:29:05,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44843897824030277 [2022-11-25 18:29:05,713 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 948 transitions. [2022-11-25 18:29:05,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 948 transitions. [2022-11-25 18:29:05,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:05,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 948 transitions. [2022-11-25 18:29:05,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.42857142857142) internal successors, (948), 7 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,721 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,721 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 102 flow. Second operand 7 states and 948 transitions. [2022-11-25 18:29:05,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 372 flow [2022-11-25 18:29:05,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 337 flow, removed 14 selfloop flow, removed 8 redundant places. [2022-11-25 18:29:05,727 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 142 flow [2022-11-25 18:29:05,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2022-11-25 18:29:05,728 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2022-11-25 18:29:05,728 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 142 flow [2022-11-25 18:29:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 130.0) internal successors, (1690), 13 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,729 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:05,729 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] [2022-11-25 18:29:05,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:05,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:05,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:05,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1487405414, now seen corresponding path program 2 times [2022-11-25 18:29:05,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:05,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785779333] [2022-11-25 18:29:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:06,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:06,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785779333] [2022-11-25 18:29:06,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785779333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:06,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475881720] [2022-11-25 18:29:06,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:29:06,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:06,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:06,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:06,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:29:06,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:29:06,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:29:06,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:29:06,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:06,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:06,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:06,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475881720] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:06,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:29:06,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-11-25 18:29:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128392050] [2022-11-25 18:29:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:29:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:29:06,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:29:06,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 302 [2022-11-25 18:29:06,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:06,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 302 [2022-11-25 18:29:06,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:06,897 INFO L130 PetriNetUnfolder]: 736/1083 cut-off events. [2022-11-25 18:29:06,897 INFO L131 PetriNetUnfolder]: For 1027/1027 co-relation queries the response was YES. [2022-11-25 18:29:06,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3402 conditions, 1083 events. 736/1083 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4348 event pairs, 221 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 3380. Up to 648 conditions per place. [2022-11-25 18:29:06,906 INFO L137 encePairwiseOnDemand]: 294/302 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2022-11-25 18:29:06,907 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 449 flow [2022-11-25 18:29:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:29:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:29:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 944 transitions. [2022-11-25 18:29:06,911 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44654683065279094 [2022-11-25 18:29:06,911 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 944 transitions. [2022-11-25 18:29:06,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 944 transitions. [2022-11-25 18:29:06,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:06,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 944 transitions. [2022-11-25 18:29:06,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.85714285714286) internal successors, (944), 7 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,919 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,919 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 142 flow. Second operand 7 states and 944 transitions. [2022-11-25 18:29:06,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 449 flow [2022-11-25 18:29:06,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 414 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-11-25 18:29:06,924 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 200 flow [2022-11-25 18:29:06,924 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2022-11-25 18:29:06,925 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2022-11-25 18:29:06,925 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 200 flow [2022-11-25 18:29:06,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:06,926 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] [2022-11-25 18:29:06,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:07,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:29:07,133 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:07,133 INFO L85 PathProgramCache]: Analyzing trace with hash -893163230, now seen corresponding path program 3 times [2022-11-25 18:29:07,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:07,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298997812] [2022-11-25 18:29:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:07,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:07,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:07,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298997812] [2022-11-25 18:29:07,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298997812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:07,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394225444] [2022-11-25 18:29:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:29:07,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:07,286 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:07,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:29:07,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:29:07,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:29:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:29:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:07,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:07,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394225444] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:07,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:29:07,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-11-25 18:29:07,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280704942] [2022-11-25 18:29:07,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:07,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:29:07,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:07,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:29:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:29:07,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 302 [2022-11-25 18:29:07,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:07,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:07,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 302 [2022-11-25 18:29:07,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:08,200 INFO L130 PetriNetUnfolder]: 840/1246 cut-off events. [2022-11-25 18:29:08,201 INFO L131 PetriNetUnfolder]: For 2189/2189 co-relation queries the response was YES. [2022-11-25 18:29:08,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4494 conditions, 1246 events. 840/1246 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5316 event pairs, 211 based on Foata normal form. 16/1259 useless extension candidates. Maximal degree in co-relation 4469. Up to 612 conditions per place. [2022-11-25 18:29:08,212 INFO L137 encePairwiseOnDemand]: 294/302 looper letters, 62 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2022-11-25 18:29:08,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 561 flow [2022-11-25 18:29:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:29:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:29:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 951 transitions. [2022-11-25 18:29:08,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4498580889309366 [2022-11-25 18:29:08,216 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 951 transitions. [2022-11-25 18:29:08,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 951 transitions. [2022-11-25 18:29:08,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:08,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 951 transitions. [2022-11-25 18:29:08,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.85714285714286) internal successors, (951), 7 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:08,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:08,224 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:08,225 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 200 flow. Second operand 7 states and 951 transitions. [2022-11-25 18:29:08,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 561 flow [2022-11-25 18:29:08,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 520 flow, removed 12 selfloop flow, removed 3 redundant places. [2022-11-25 18:29:08,231 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 310 flow [2022-11-25 18:29:08,232 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2022-11-25 18:29:08,232 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2022-11-25 18:29:08,232 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 310 flow [2022-11-25 18:29:08,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:08,233 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:08,233 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] [2022-11-25 18:29:08,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:08,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:08,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:08,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash -827364460, now seen corresponding path program 4 times [2022-11-25 18:29:08,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:08,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302389120] [2022-11-25 18:29:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:08,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:08,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302389120] [2022-11-25 18:29:08,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302389120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:08,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037413413] [2022-11-25 18:29:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:29:08,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:08,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:08,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:08,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:29:08,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:29:08,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:29:08,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:29:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:08,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:08,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:08,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037413413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:08,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:08,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2022-11-25 18:29:08,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321399511] [2022-11-25 18:29:08,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:08,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:29:08,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:08,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:29:08,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:29:09,196 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 302 [2022-11-25 18:29:09,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 310 flow. Second operand has 13 states, 13 states have (on average 126.0) internal successors, (1638), 13 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:09,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:09,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 302 [2022-11-25 18:29:09,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:09,777 INFO L130 PetriNetUnfolder]: 869/1312 cut-off events. [2022-11-25 18:29:09,777 INFO L131 PetriNetUnfolder]: For 3837/3837 co-relation queries the response was YES. [2022-11-25 18:29:09,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5202 conditions, 1312 events. 869/1312 cut-off events. For 3837/3837 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5388 event pairs, 30 based on Foata normal form. 18/1329 useless extension candidates. Maximal degree in co-relation 5174. Up to 590 conditions per place. [2022-11-25 18:29:09,791 INFO L137 encePairwiseOnDemand]: 293/302 looper letters, 80 selfloop transitions, 43 changer transitions 0/123 dead transitions. [2022-11-25 18:29:09,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 123 transitions, 1016 flow [2022-11-25 18:29:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:29:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:29:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1440 transitions. [2022-11-25 18:29:09,796 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4334738109572547 [2022-11-25 18:29:09,796 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1440 transitions. [2022-11-25 18:29:09,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1440 transitions. [2022-11-25 18:29:09,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:09,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1440 transitions. [2022-11-25 18:29:09,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 130.9090909090909) internal successors, (1440), 11 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:09,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 302.0) internal successors, (3624), 12 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:09,809 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 302.0) internal successors, (3624), 12 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:09,810 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 310 flow. Second operand 11 states and 1440 transitions. [2022-11-25 18:29:09,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 123 transitions, 1016 flow [2022-11-25 18:29:09,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 123 transitions, 977 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-25 18:29:09,824 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 673 flow [2022-11-25 18:29:09,824 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=673, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2022-11-25 18:29:09,825 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 33 predicate places. [2022-11-25 18:29:09,825 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 673 flow [2022-11-25 18:29:09,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 126.0) internal successors, (1638), 13 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:09,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:09,826 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] [2022-11-25 18:29:09,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:10,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:10,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:10,034 INFO L85 PathProgramCache]: Analyzing trace with hash 596300554, now seen corresponding path program 5 times [2022-11-25 18:29:10,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:10,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995676693] [2022-11-25 18:29:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:10,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:10,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995676693] [2022-11-25 18:29:10,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995676693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111408620] [2022-11-25 18:29:10,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:29:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:10,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:10,178 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:10,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:29:10,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:29:10,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:29:10,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:29:10,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:10,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:10,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111408620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:10,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:10,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-11-25 18:29:10,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585848354] [2022-11-25 18:29:10,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:10,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:29:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:29:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:29:10,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 302 [2022-11-25 18:29:10,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 673 flow. Second operand has 16 states, 16 states have (on average 126.0) internal successors, (2016), 16 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:10,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:10,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 302 [2022-11-25 18:29:10,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:11,536 INFO L130 PetriNetUnfolder]: 1230/1853 cut-off events. [2022-11-25 18:29:11,536 INFO L131 PetriNetUnfolder]: For 9045/9045 co-relation queries the response was YES. [2022-11-25 18:29:11,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 1853 events. 1230/1853 cut-off events. For 9045/9045 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8079 event pairs, 194 based on Foata normal form. 26/1878 useless extension candidates. Maximal degree in co-relation 8579. Up to 713 conditions per place. [2022-11-25 18:29:11,554 INFO L137 encePairwiseOnDemand]: 292/302 looper letters, 102 selfloop transitions, 60 changer transitions 0/162 dead transitions. [2022-11-25 18:29:11,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 162 transitions, 1547 flow [2022-11-25 18:29:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:29:11,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:29:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1326 transitions. [2022-11-25 18:29:11,560 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4390728476821192 [2022-11-25 18:29:11,560 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1326 transitions. [2022-11-25 18:29:11,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1326 transitions. [2022-11-25 18:29:11,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:11,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1326 transitions. [2022-11-25 18:29:11,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 132.6) internal successors, (1326), 10 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:11,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 302.0) internal successors, (3322), 11 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:11,571 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 302.0) internal successors, (3322), 11 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:11,571 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 673 flow. Second operand 10 states and 1326 transitions. [2022-11-25 18:29:11,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 162 transitions, 1547 flow [2022-11-25 18:29:11,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 162 transitions, 1498 flow, removed 23 selfloop flow, removed 2 redundant places. [2022-11-25 18:29:11,605 INFO L231 Difference]: Finished difference. Result has 75 places, 100 transitions, 1119 flow [2022-11-25 18:29:11,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1119, PETRI_PLACES=75, PETRI_TRANSITIONS=100} [2022-11-25 18:29:11,606 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 45 predicate places. [2022-11-25 18:29:11,606 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 100 transitions, 1119 flow [2022-11-25 18:29:11,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 126.0) internal successors, (2016), 16 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:11,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:11,608 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] [2022-11-25 18:29:11,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:11,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:11,814 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash -690897724, now seen corresponding path program 6 times [2022-11-25 18:29:11,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:11,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245496501] [2022-11-25 18:29:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:12,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:12,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245496501] [2022-11-25 18:29:12,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245496501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:12,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912950359] [2022-11-25 18:29:12,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:29:12,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:12,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:12,003 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:12,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:29:12,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 18:29:12,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:29:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:29:12,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:12,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:12,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912950359] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:12,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:29:12,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-11-25 18:29:12,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415679402] [2022-11-25 18:29:12,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:12,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:29:12,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:29:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:29:12,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 302 [2022-11-25 18:29:12,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 100 transitions, 1119 flow. Second operand has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:12,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:12,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 302 [2022-11-25 18:29:12,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:12,948 INFO L130 PetriNetUnfolder]: 1162/1732 cut-off events. [2022-11-25 18:29:12,949 INFO L131 PetriNetUnfolder]: For 12592/12658 co-relation queries the response was YES. [2022-11-25 18:29:12,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9352 conditions, 1732 events. 1162/1732 cut-off events. For 12592/12658 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7506 event pairs, 262 based on Foata normal form. 41/1757 useless extension candidates. Maximal degree in co-relation 9312. Up to 924 conditions per place. [2022-11-25 18:29:12,970 INFO L137 encePairwiseOnDemand]: 294/302 looper letters, 72 selfloop transitions, 55 changer transitions 0/134 dead transitions. [2022-11-25 18:29:12,971 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 134 transitions, 1571 flow [2022-11-25 18:29:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:29:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-25 18:29:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 945 transitions. [2022-11-25 18:29:12,974 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4470198675496689 [2022-11-25 18:29:12,975 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 945 transitions. [2022-11-25 18:29:12,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 945 transitions. [2022-11-25 18:29:12,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:12,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 945 transitions. [2022-11-25 18:29:12,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:12,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:12,993 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 302.0) internal successors, (2416), 8 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:12,993 INFO L175 Difference]: Start difference. First operand has 75 places, 100 transitions, 1119 flow. Second operand 7 states and 945 transitions. [2022-11-25 18:29:12,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 134 transitions, 1571 flow [2022-11-25 18:29:13,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 1511 flow, removed 6 selfloop flow, removed 3 redundant places. [2022-11-25 18:29:13,028 INFO L231 Difference]: Finished difference. Result has 80 places, 106 transitions, 1296 flow [2022-11-25 18:29:13,029 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1296, PETRI_PLACES=80, PETRI_TRANSITIONS=106} [2022-11-25 18:29:13,029 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 50 predicate places. [2022-11-25 18:29:13,030 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 106 transitions, 1296 flow [2022-11-25 18:29:13,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 130.0) internal successors, (910), 7 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:13,030 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:13,031 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] [2022-11-25 18:29:13,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:13,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:29:13,237 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:13,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:13,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1785052722, now seen corresponding path program 1 times [2022-11-25 18:29:13,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:13,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775258574] [2022-11-25 18:29:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:13,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:13,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:13,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775258574] [2022-11-25 18:29:13,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775258574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:13,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081938844] [2022-11-25 18:29:13,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:13,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:13,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:13,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:13,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:29:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:13,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:29:13,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:13,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:29:13,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081938844] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:13,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:29:13,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-11-25 18:29:13,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181582771] [2022-11-25 18:29:13,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:13,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:29:13,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:29:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:29:13,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 302 [2022-11-25 18:29:13,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 106 transitions, 1296 flow. Second operand has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:13,601 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:13,601 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 302 [2022-11-25 18:29:13,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:13,877 INFO L130 PetriNetUnfolder]: 960/1418 cut-off events. [2022-11-25 18:29:13,878 INFO L131 PetriNetUnfolder]: For 12166/12389 co-relation queries the response was YES. [2022-11-25 18:29:13,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7848 conditions, 1418 events. 960/1418 cut-off events. For 12166/12389 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6198 event pairs, 280 based on Foata normal form. 226/1569 useless extension candidates. Maximal degree in co-relation 7805. Up to 1101 conditions per place. [2022-11-25 18:29:13,893 INFO L137 encePairwiseOnDemand]: 297/302 looper letters, 105 selfloop transitions, 11 changer transitions 0/129 dead transitions. [2022-11-25 18:29:13,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 129 transitions, 1751 flow [2022-11-25 18:29:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:29:13,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:29:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 699 transitions. [2022-11-25 18:29:13,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4629139072847682 [2022-11-25 18:29:13,896 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 699 transitions. [2022-11-25 18:29:13,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 699 transitions. [2022-11-25 18:29:13,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:13,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 699 transitions. [2022-11-25 18:29:13,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:13,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:13,902 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:13,902 INFO L175 Difference]: Start difference. First operand has 80 places, 106 transitions, 1296 flow. Second operand 5 states and 699 transitions. [2022-11-25 18:29:13,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 129 transitions, 1751 flow [2022-11-25 18:29:13,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 129 transitions, 1624 flow, removed 21 selfloop flow, removed 4 redundant places. [2022-11-25 18:29:13,933 INFO L231 Difference]: Finished difference. Result has 81 places, 107 transitions, 1226 flow [2022-11-25 18:29:13,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1226, PETRI_PLACES=81, PETRI_TRANSITIONS=107} [2022-11-25 18:29:13,934 INFO L288 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2022-11-25 18:29:13,934 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 107 transitions, 1226 flow [2022-11-25 18:29:13,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:13,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:13,935 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] [2022-11-25 18:29:13,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:14,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:29:14,141 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-25 18:29:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:14,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1428037727, now seen corresponding path program 1 times [2022-11-25 18:29:14,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:14,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370390333] [2022-11-25 18:29:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:14,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:15,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:15,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370390333] [2022-11-25 18:29:15,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370390333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:15,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704630997] [2022-11-25 18:29:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:15,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:15,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:15,476 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:15,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b4dfe2b-a5f9-4624-9278-f76e6589a516/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:29:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-25 18:29:15,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:15,717 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 [2022-11-25 18:29:15,810 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 6 treesize of output 5 [2022-11-25 18:29:15,944 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 6 treesize of output 5 [2022-11-25 18:29:16,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:29:16,121 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 14 treesize of output 16 [2022-11-25 18:29:16,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:16,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-25 18:29:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:16,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:18,728 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (= (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~sum3~0 c_~sum2~0) 4294967296) (mod c_~sum1~0 4294967296)) (not (< ~M~0 c_~N~0)) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-11-25 18:29:20,784 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (not (< ~M~0 c_~N~0)) (= (mod (+ c_~sum1~0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork0_~i~0 4)))) 4294967296) (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~sum3~0 c_~sum2~0) 4294967296)) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-11-25 18:29:22,817 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (not (< ~M~0 c_~N~0)) (= (mod (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~sum1~0) 4294967296) (mod (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~sum3~0 c_~sum2~0) 4294967296)) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-11-25 18:29:24,860 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_436 (Array Int Int)) (v_ArrVal_437 (Array Int Int)) (~M~0 Int)) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_436))) (= (mod (+ c_~sum1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) 4294967296) (mod (+ c_~sum3~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_437) c_~A~0.base) (+ c_~A~0.offset (* ~M~0 4))) c_~sum2~0) 4294967296))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-11-25 18:29:25,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:25,597 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 52 [2022-11-25 18:29:25,627 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:25,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3926 treesize of output 3680 [2022-11-25 18:29:25,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:25,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3670 treesize of output 3520 [2022-11-25 18:29:25,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3510 treesize of output 3126 [2022-11-25 18:29:25,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:25,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3126 treesize of output 2816 [2022-11-25 18:30:20,037 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:30:20,054 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:30:20,055 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:30:29,423 WARN L233 SmtUtils]: Spent 9.27s on a formula simplification. DAG size of input: 554 DAG size of output: 554 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 18:31:04,431 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,757 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,785 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,786 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-25 18:31:04,813 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,863 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,896 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,898 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,937 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,938 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,977 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,979 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:31:04,980 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-25 18:33:29,197 WARN L233 SmtUtils]: Spent 2.39m on a formula simplification. DAG size of input: 1250 DAG size of output: 1250 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 18:34:47,145 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:34:47,167 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:34:47,169 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:34:47,171 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-25 18:35:20,975 WARN L233 SmtUtils]: Spent 33.53s on a formula simplification. DAG size of input: 945 DAG size of output: 945 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 18:35:52,941 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:35:52,969 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:35:52,972 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-25 18:35:53,001 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:35:53,028 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:36:03,598 WARN L233 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 742 DAG size of output: 742 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 18:36:13,431 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:36:13,454 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:36:13,456 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:36:13,456 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-25 18:36:47,273 WARN L233 SmtUtils]: Spent 33.51s on a formula simplification. DAG size of input: 953 DAG size of output: 953 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 18:37:13,983 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,009 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,014 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-25 18:37:14,040 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,080 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,103 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,105 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,152 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,154 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,199 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,200 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:37:14,202 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-25 18:39:06,335 WARN L233 SmtUtils]: Spent 1.86m on a formula simplification. DAG size of input: 1250 DAG size of output: 1250 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 18:40:22,533 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:40:22,562 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:40:22,564 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:40:22,566 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-25 18:41:00,004 WARN L233 SmtUtils]: Spent 37.18s on a formula simplification. DAG size of input: 945 DAG size of output: 945 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 18:41:32,729 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,752 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,754 WARN L718 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2022-11-25 18:41:32,779 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,819 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,841 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,842 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,880 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,881 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,913 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,915 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-25 18:41:32,916 WARN L718 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2022-11-25 18:43:34,884 WARN L233 SmtUtils]: Spent 2.02m on a formula simplification. DAG size of input: 1250 DAG size of output: 1250 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)