./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a --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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- 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-b5237d8 [2022-11-21 14:03:28,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 14:03:28,755 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 14:03:28,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 14:03:28,774 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 14:03:28,775 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 14:03:28,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 14:03:28,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 14:03:28,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 14:03:28,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 14:03:28,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 14:03:28,783 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 14:03:28,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 14:03:28,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 14:03:28,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 14:03:28,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 14:03:28,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 14:03:28,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 14:03:28,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 14:03:28,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 14:03:28,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 14:03:28,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 14:03:28,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 14:03:28,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 14:03:28,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 14:03:28,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 14:03:28,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 14:03:28,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 14:03:28,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 14:03:28,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 14:03:28,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 14:03:28,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 14:03:28,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 14:03:28,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 14:03:28,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 14:03:28,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 14:03:28,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 14:03:28,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 14:03:28,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 14:03:28,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 14:03:28,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 14:03:28,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 14:03:28,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 14:03:28,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 14:03:28,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 14:03:28,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 14:03:28,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 14:03:28,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 14:03:28,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 14:03:28,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 14:03:28,867 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 14:03:28,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 14:03:28,868 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 14:03:28,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 14:03:28,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 14:03:28,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 14:03:28,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 14:03:28,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 14:03:28,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 14:03:28,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 14:03:28,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 14:03:28,870 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 14:03:28,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 14:03:28,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 14:03:28,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 14:03:28,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 14:03:28,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 14:03:28,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 14:03:28,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 14:03:28,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 14:03:28,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 14:03:28,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 14:03:28,872 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 14:03:28,872 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 14:03:28,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 14:03:28,873 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-21 14:03:29,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 14:03:29,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 14:03:29,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 14:03:29,171 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 14:03:29,172 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 14:03:29,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-21 14:03:32,268 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 14:03:32,494 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 14:03:32,495 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-21 14:03:32,503 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/data/828c7f183/8790b06b84e24f20a82247db7336eab1/FLAG83229c227 [2022-11-21 14:03:32,519 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/data/828c7f183/8790b06b84e24f20a82247db7336eab1 [2022-11-21 14:03:32,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 14:03:32,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 14:03:32,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 14:03:32,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 14:03:32,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 14:03:32,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:32,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e1c4464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32, skipping insertion in model container [2022-11-21 14:03:32,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:32,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 14:03:32,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 14:03:32,817 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_ac01166c-087e-4355-81a4-6a6017514002/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-21 14:03:32,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 14:03:32,844 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 14:03:32,874 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_ac01166c-087e-4355-81a4-6a6017514002/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-21 14:03:32,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 14:03:32,901 INFO L208 MainTranslator]: Completed translation [2022-11-21 14:03:32,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32 WrapperNode [2022-11-21 14:03:32,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 14:03:32,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 14:03:32,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 14:03:32,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 14:03:32,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:32,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:32,971 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2022-11-21 14:03:32,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 14:03:32,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 14:03:32,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 14:03:32,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 14:03:32,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:32,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:33,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:33,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:33,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:33,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:33,045 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:33,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:33,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 14:03:33,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 14:03:33,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 14:03:33,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 14:03:33,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (1/1) ... [2022-11-21 14:03:33,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 14:03:33,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:03:33,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 14:03:33,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 14:03:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 14:03:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 14:03:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 14:03:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 14:03:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 14:03:33,163 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 14:03:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 14:03:33,165 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 14:03:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 14:03:33,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 14:03:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 14:03:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 14:03:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 14:03:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 14:03:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 14:03:33,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 14:03:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 14:03:33,169 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 14:03:33,340 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 14:03:33,343 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 14:03:33,917 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 14:03:34,174 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 14:03:34,174 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-21 14:03:34,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 02:03:34 BoogieIcfgContainer [2022-11-21 14:03:34,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 14:03:34,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 14:03:34,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 14:03:34,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 14:03:34,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 02:03:32" (1/3) ... [2022-11-21 14:03:34,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ccb2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 02:03:34, skipping insertion in model container [2022-11-21 14:03:34,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 02:03:32" (2/3) ... [2022-11-21 14:03:34,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ccb2b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 02:03:34, skipping insertion in model container [2022-11-21 14:03:34,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 02:03:34" (3/3) ... [2022-11-21 14:03:34,186 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-11-21 14:03:34,196 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 14:03:34,207 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 14:03:34,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 14:03:34,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 14:03:34,293 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 14:03:34,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2022-11-21 14:03:34,477 INFO L130 PetriNetUnfolder]: 22/264 cut-off events. [2022-11-21 14:03:34,477 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 14:03:34,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 155 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2022-11-21 14:03:34,489 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2022-11-21 14:03:34,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2022-11-21 14:03:34,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 14:03:34,514 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;@102611d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 14:03:34,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 14:03:34,575 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2022-11-21 14:03:34,575 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-21 14:03:34,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:34,576 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:34,576 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)] === [2022-11-21 14:03:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:34,581 INFO L85 PathProgramCache]: Analyzing trace with hash -689870397, now seen corresponding path program 1 times [2022-11-21 14:03:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:34,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111243933] [2022-11-21 14:03:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:03:35,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:35,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111243933] [2022-11-21 14:03:35,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111243933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:03:35,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:03:35,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 14:03:35,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787193686] [2022-11-21 14:03:35,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:03:35,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 14:03:35,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:35,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 14:03:35,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 14:03:35,116 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 267 [2022-11-21 14:03:35,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 253 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:35,121 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 267 [2022-11-21 14:03:35,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:35,376 INFO L130 PetriNetUnfolder]: 137/624 cut-off events. [2022-11-21 14:03:35,376 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-21 14:03:35,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 624 events. 137/624 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2441 event pairs, 74 based on Foata normal form. 97/654 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2022-11-21 14:03:35,389 INFO L137 encePairwiseOnDemand]: 251/267 looper letters, 13 selfloop transitions, 0 changer transitions 8/237 dead transitions. [2022-11-21 14:03:35,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 518 flow [2022-11-21 14:03:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 14:03:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 14:03:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2022-11-21 14:03:35,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9419475655430711 [2022-11-21 14:03:35,416 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2022-11-21 14:03:35,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2022-11-21 14:03:35,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:35,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2022-11-21 14:03:35,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,439 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,441 INFO L175 Difference]: Start difference. First operand has 241 places, 253 transitions, 524 flow. Second operand 2 states and 503 transitions. [2022-11-21 14:03:35,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 518 flow [2022-11-21 14:03:35,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-21 14:03:35,456 INFO L231 Difference]: Finished difference. Result has 236 places, 229 transitions, 464 flow [2022-11-21 14:03:35,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=464, PETRI_PLACES=236, PETRI_TRANSITIONS=229} [2022-11-21 14:03:35,464 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, -5 predicate places. [2022-11-21 14:03:35,464 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 229 transitions, 464 flow [2022-11-21 14:03:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:35,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:35,466 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 14:03:35,466 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)] === [2022-11-21 14:03:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:35,469 INFO L85 PathProgramCache]: Analyzing trace with hash -656521895, now seen corresponding path program 1 times [2022-11-21 14:03:35,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:35,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127777034] [2022-11-21 14:03:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:35,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:03:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127777034] [2022-11-21 14:03:36,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127777034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:03:36,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:03:36,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 14:03:36,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046223275] [2022-11-21 14:03:36,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:03:36,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 14:03:36,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 14:03:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 14:03:36,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2022-11-21 14:03:36,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 229 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:36,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:36,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2022-11-21 14:03:36,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:36,433 INFO L130 PetriNetUnfolder]: 125/535 cut-off events. [2022-11-21 14:03:36,433 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-21 14:03:36,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 535 events. 125/535 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1791 event pairs, 29 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 745. Up to 142 conditions per place. [2022-11-21 14:03:36,439 INFO L137 encePairwiseOnDemand]: 264/267 looper letters, 22 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-11-21 14:03:36,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 236 transitions, 528 flow [2022-11-21 14:03:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 14:03:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 14:03:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-11-21 14:03:36,444 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9038701622971286 [2022-11-21 14:03:36,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-11-21 14:03:36,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-11-21 14:03:36,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:36,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-11-21 14:03:36,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:36,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:36,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:36,453 INFO L175 Difference]: Start difference. First operand has 236 places, 229 transitions, 464 flow. Second operand 3 states and 724 transitions. [2022-11-21 14:03:36,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 236 transitions, 528 flow [2022-11-21 14:03:36,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 236 transitions, 528 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 14:03:36,463 INFO L231 Difference]: Finished difference. Result has 231 places, 230 transitions, 476 flow [2022-11-21 14:03:36,464 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2022-11-21 14:03:36,465 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, -10 predicate places. [2022-11-21 14:03:36,465 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 476 flow [2022-11-21 14:03:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:36,466 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:36,466 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:36,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 14:03:36,467 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)] === [2022-11-21 14:03:36,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:36,468 INFO L85 PathProgramCache]: Analyzing trace with hash 942137239, now seen corresponding path program 2 times [2022-11-21 14:03:36,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:36,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403832454] [2022-11-21 14:03:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:36,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:03:36,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:36,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403832454] [2022-11-21 14:03:36,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403832454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:03:36,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:03:36,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 14:03:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243257407] [2022-11-21 14:03:36,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:03:36,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 14:03:36,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 14:03:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 14:03:36,842 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 267 [2022-11-21 14:03:36,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 476 flow. Second operand has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:36,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:36,844 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 267 [2022-11-21 14:03:36,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:37,195 INFO L130 PetriNetUnfolder]: 245/858 cut-off events. [2022-11-21 14:03:37,196 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-21 14:03:37,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 858 events. 245/858 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4119 event pairs, 84 based on Foata normal form. 1/806 useless extension candidates. Maximal degree in co-relation 1454. Up to 226 conditions per place. [2022-11-21 14:03:37,202 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 57 selfloop transitions, 2 changer transitions 7/247 dead transitions. [2022-11-21 14:03:37,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 247 transitions, 654 flow [2022-11-21 14:03:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 14:03:37,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 14:03:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2022-11-21 14:03:37,205 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7752808988764045 [2022-11-21 14:03:37,206 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2022-11-21 14:03:37,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2022-11-21 14:03:37,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:37,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2022-11-21 14:03:37,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,213 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,213 INFO L175 Difference]: Start difference. First operand has 231 places, 230 transitions, 476 flow. Second operand 5 states and 1035 transitions. [2022-11-21 14:03:37,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 247 transitions, 654 flow [2022-11-21 14:03:37,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 247 transitions, 651 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 14:03:37,219 INFO L231 Difference]: Finished difference. Result has 237 places, 231 transitions, 490 flow [2022-11-21 14:03:37,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=490, PETRI_PLACES=237, PETRI_TRANSITIONS=231} [2022-11-21 14:03:37,220 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, -4 predicate places. [2022-11-21 14:03:37,220 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 231 transitions, 490 flow [2022-11-21 14:03:37,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,221 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:37,222 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:37,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 14:03:37,222 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)] === [2022-11-21 14:03:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:37,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1508449891, now seen corresponding path program 1 times [2022-11-21 14:03:37,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:37,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989453161] [2022-11-21 14:03:37,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:37,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:03:37,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:37,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989453161] [2022-11-21 14:03:37,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989453161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:03:37,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:03:37,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 14:03:37,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260584836] [2022-11-21 14:03:37,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:03:37,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 14:03:37,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 14:03:37,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 14:03:37,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2022-11-21 14:03:37,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 231 transitions, 490 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:37,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2022-11-21 14:03:37,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:37,800 INFO L130 PetriNetUnfolder]: 138/568 cut-off events. [2022-11-21 14:03:37,800 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-11-21 14:03:37,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 568 events. 138/568 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2002 event pairs, 50 based on Foata normal form. 11/547 useless extension candidates. Maximal degree in co-relation 887. Up to 128 conditions per place. [2022-11-21 14:03:37,804 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 22 selfloop transitions, 4 changer transitions 3/239 dead transitions. [2022-11-21 14:03:37,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 239 transitions, 570 flow [2022-11-21 14:03:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 14:03:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 14:03:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2022-11-21 14:03:37,808 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8976279650436954 [2022-11-21 14:03:37,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2022-11-21 14:03:37,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2022-11-21 14:03:37,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:37,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2022-11-21 14:03:37,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,819 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,819 INFO L175 Difference]: Start difference. First operand has 237 places, 231 transitions, 490 flow. Second operand 3 states and 719 transitions. [2022-11-21 14:03:37,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 239 transitions, 570 flow [2022-11-21 14:03:37,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 239 transitions, 564 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-21 14:03:37,826 INFO L231 Difference]: Finished difference. Result has 235 places, 232 transitions, 502 flow [2022-11-21 14:03:37,828 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=235, PETRI_TRANSITIONS=232} [2022-11-21 14:03:37,830 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, -6 predicate places. [2022-11-21 14:03:37,830 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 232 transitions, 502 flow [2022-11-21 14:03:37,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:37,831 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:37,832 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:37,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 14:03:37,832 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)] === [2022-11-21 14:03:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash 150749583, now seen corresponding path program 2 times [2022-11-21 14:03:37,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:37,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173522142] [2022-11-21 14:03:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:37,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:03:38,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:38,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173522142] [2022-11-21 14:03:38,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173522142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:03:38,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:03:38,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 14:03:38,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558331058] [2022-11-21 14:03:38,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:03:38,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 14:03:38,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:38,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 14:03:38,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-21 14:03:38,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 267 [2022-11-21 14:03:38,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 232 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 201.14285714285714) internal successors, (1408), 7 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:38,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:38,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 267 [2022-11-21 14:03:38,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:38,687 INFO L130 PetriNetUnfolder]: 103/645 cut-off events. [2022-11-21 14:03:38,687 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-11-21 14:03:38,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 645 events. 103/645 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2043 event pairs, 48 based on Foata normal form. 10/623 useless extension candidates. Maximal degree in co-relation 1013. Up to 189 conditions per place. [2022-11-21 14:03:38,691 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 53 selfloop transitions, 11 changer transitions 31/270 dead transitions. [2022-11-21 14:03:38,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 270 transitions, 773 flow [2022-11-21 14:03:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 14:03:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 14:03:38,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2047 transitions. [2022-11-21 14:03:38,696 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2022-11-21 14:03:38,697 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2047 transitions. [2022-11-21 14:03:38,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2047 transitions. [2022-11-21 14:03:38,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:38,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2047 transitions. [2022-11-21 14:03:38,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 204.7) internal successors, (2047), 10 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:38,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:38,712 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:38,712 INFO L175 Difference]: Start difference. First operand has 235 places, 232 transitions, 502 flow. Second operand 10 states and 2047 transitions. [2022-11-21 14:03:38,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 270 transitions, 773 flow [2022-11-21 14:03:38,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 270 transitions, 769 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 14:03:38,719 INFO L231 Difference]: Finished difference. Result has 246 places, 234 transitions, 548 flow [2022-11-21 14:03:38,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=548, PETRI_PLACES=246, PETRI_TRANSITIONS=234} [2022-11-21 14:03:38,722 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 5 predicate places. [2022-11-21 14:03:38,722 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 234 transitions, 548 flow [2022-11-21 14:03:38,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.14285714285714) internal successors, (1408), 7 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:38,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:38,724 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:38,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 14:03:38,724 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)] === [2022-11-21 14:03:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash -576486221, now seen corresponding path program 1 times [2022-11-21 14:03:38,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:38,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274184580] [2022-11-21 14:03:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:38,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 14:03:39,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:39,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274184580] [2022-11-21 14:03:39,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274184580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:03:39,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:03:39,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 14:03:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890538931] [2022-11-21 14:03:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:03:39,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 14:03:39,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 14:03:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 14:03:39,163 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-11-21 14:03:39,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 234 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:39,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:39,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-11-21 14:03:39,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:39,380 INFO L130 PetriNetUnfolder]: 73/464 cut-off events. [2022-11-21 14:03:39,380 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2022-11-21 14:03:39,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 464 events. 73/464 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1008 event pairs, 35 based on Foata normal form. 2/445 useless extension candidates. Maximal degree in co-relation 814. Up to 108 conditions per place. [2022-11-21 14:03:39,383 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 53 selfloop transitions, 6 changer transitions 9/247 dead transitions. [2022-11-21 14:03:39,384 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 247 transitions, 726 flow [2022-11-21 14:03:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 14:03:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 14:03:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1457 transitions. [2022-11-21 14:03:39,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7795612627073302 [2022-11-21 14:03:39,388 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1457 transitions. [2022-11-21 14:03:39,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1457 transitions. [2022-11-21 14:03:39,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:39,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1457 transitions. [2022-11-21 14:03:39,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.14285714285714) internal successors, (1457), 7 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:39,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:39,399 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:39,399 INFO L175 Difference]: Start difference. First operand has 246 places, 234 transitions, 548 flow. Second operand 7 states and 1457 transitions. [2022-11-21 14:03:39,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 247 transitions, 726 flow [2022-11-21 14:03:39,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 247 transitions, 707 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-21 14:03:39,407 INFO L231 Difference]: Finished difference. Result has 247 places, 235 transitions, 552 flow [2022-11-21 14:03:39,408 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=247, PETRI_TRANSITIONS=235} [2022-11-21 14:03:39,411 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 6 predicate places. [2022-11-21 14:03:39,411 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 235 transitions, 552 flow [2022-11-21 14:03:39,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:39,412 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:39,412 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:39,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 14:03:39,412 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)] === [2022-11-21 14:03:39,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:39,413 INFO L85 PathProgramCache]: Analyzing trace with hash 265266157, now seen corresponding path program 1 times [2022-11-21 14:03:39,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:39,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148202283] [2022-11-21 14:03:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:39,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 14:03:39,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:39,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148202283] [2022-11-21 14:03:39,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148202283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:03:39,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:03:39,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 14:03:39,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151749800] [2022-11-21 14:03:39,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:03:39,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 14:03:39,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:39,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 14:03:39,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 14:03:39,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-11-21 14:03:39,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 235 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:39,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:39,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-11-21 14:03:39,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:40,163 INFO L130 PetriNetUnfolder]: 68/486 cut-off events. [2022-11-21 14:03:40,164 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2022-11-21 14:03:40,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 486 events. 68/486 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 974 event pairs, 32 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 833. Up to 131 conditions per place. [2022-11-21 14:03:40,167 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 52 selfloop transitions, 8 changer transitions 19/258 dead transitions. [2022-11-21 14:03:40,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 258 transitions, 779 flow [2022-11-21 14:03:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 14:03:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 14:03:40,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1865 transitions. [2022-11-21 14:03:40,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7761131918435289 [2022-11-21 14:03:40,174 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1865 transitions. [2022-11-21 14:03:40,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1865 transitions. [2022-11-21 14:03:40,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:40,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1865 transitions. [2022-11-21 14:03:40,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.22222222222223) internal successors, (1865), 9 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:40,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:40,186 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:40,186 INFO L175 Difference]: Start difference. First operand has 247 places, 235 transitions, 552 flow. Second operand 9 states and 1865 transitions. [2022-11-21 14:03:40,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 258 transitions, 779 flow [2022-11-21 14:03:40,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 258 transitions, 761 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-21 14:03:40,201 INFO L231 Difference]: Finished difference. Result has 251 places, 236 transitions, 568 flow [2022-11-21 14:03:40,202 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=568, PETRI_PLACES=251, PETRI_TRANSITIONS=236} [2022-11-21 14:03:40,204 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 10 predicate places. [2022-11-21 14:03:40,204 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 236 transitions, 568 flow [2022-11-21 14:03:40,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:40,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:40,206 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:40,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 14:03:40,206 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)] === [2022-11-21 14:03:40,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1955447317, now seen corresponding path program 1 times [2022-11-21 14:03:40,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:40,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909308720] [2022-11-21 14:03:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:40,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 14:03:41,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:41,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909308720] [2022-11-21 14:03:41,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909308720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:03:41,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091273220] [2022-11-21 14:03:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:41,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:41,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:03:41,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:03:41,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 14:03:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:41,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 14:03:41,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:03:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 14:03:42,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:03:42,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2022-11-21 14:03:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 14:03:42,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091273220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:03:42,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:03:42,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 23 [2022-11-21 14:03:42,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972216358] [2022-11-21 14:03:43,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:03:43,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 14:03:43,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:43,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 14:03:43,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2022-11-21 14:03:43,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-11-21 14:03:43,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 236 transitions, 568 flow. Second operand has 23 states, 23 states have (on average 196.34782608695653) internal successors, (4516), 23 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:43,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:43,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-11-21 14:03:43,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:43,659 INFO L130 PetriNetUnfolder]: 89/615 cut-off events. [2022-11-21 14:03:43,660 INFO L131 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2022-11-21 14:03:43,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 615 events. 89/615 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1553 event pairs, 31 based on Foata normal form. 8/601 useless extension candidates. Maximal degree in co-relation 1090. Up to 120 conditions per place. [2022-11-21 14:03:43,664 INFO L137 encePairwiseOnDemand]: 246/267 looper letters, 52 selfloop transitions, 22 changer transitions 46/292 dead transitions. [2022-11-21 14:03:43,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 292 transitions, 984 flow [2022-11-21 14:03:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 14:03:43,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-21 14:03:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3954 transitions. [2022-11-21 14:03:43,673 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7404494382022472 [2022-11-21 14:03:43,674 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3954 transitions. [2022-11-21 14:03:43,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3954 transitions. [2022-11-21 14:03:43,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:43,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3954 transitions. [2022-11-21 14:03:43,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.7) internal successors, (3954), 20 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:43,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:43,698 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:43,699 INFO L175 Difference]: Start difference. First operand has 251 places, 236 transitions, 568 flow. Second operand 20 states and 3954 transitions. [2022-11-21 14:03:43,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 292 transitions, 984 flow [2022-11-21 14:03:43,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 292 transitions, 954 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-21 14:03:43,706 INFO L231 Difference]: Finished difference. Result has 268 places, 240 transitions, 630 flow [2022-11-21 14:03:43,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=630, PETRI_PLACES=268, PETRI_TRANSITIONS=240} [2022-11-21 14:03:43,707 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 27 predicate places. [2022-11-21 14:03:43,708 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 240 transitions, 630 flow [2022-11-21 14:03:43,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 196.34782608695653) internal successors, (4516), 23 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:43,711 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:43,711 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:43,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 14:03:43,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:43,920 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)] === [2022-11-21 14:03:43,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:43,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1839974919, now seen corresponding path program 2 times [2022-11-21 14:03:43,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:43,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134154722] [2022-11-21 14:03:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:43,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 14:03:46,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:46,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134154722] [2022-11-21 14:03:46,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134154722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:03:46,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713146918] [2022-11-21 14:03:46,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:03:46,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:03:46,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:03:46,008 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:03:46,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 14:03:46,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:03:46,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:03:46,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-21 14:03:46,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:03:47,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:03:47,116 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 36 treesize of output 10 [2022-11-21 14:03:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 14:03:47,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:03:47,502 INFO L321 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2022-11-21 14:03:47,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 19 [2022-11-21 14:03:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 14:03:47,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713146918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:03:47,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:03:47,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 6] total 34 [2022-11-21 14:03:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16830301] [2022-11-21 14:03:47,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:03:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 14:03:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 14:03:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 14:03:47,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 267 [2022-11-21 14:03:47,886 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 240 transitions, 630 flow. Second operand has 34 states, 34 states have (on average 168.1764705882353) internal successors, (5718), 34 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:47,886 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:47,886 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 267 [2022-11-21 14:03:47,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:53,306 INFO L130 PetriNetUnfolder]: 2347/5795 cut-off events. [2022-11-21 14:03:53,307 INFO L131 PetriNetUnfolder]: For 5025/5220 co-relation queries the response was YES. [2022-11-21 14:03:53,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13118 conditions, 5795 events. 2347/5795 cut-off events. For 5025/5220 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 45367 event pairs, 274 based on Foata normal form. 36/5368 useless extension candidates. Maximal degree in co-relation 13100. Up to 750 conditions per place. [2022-11-21 14:03:53,364 INFO L137 encePairwiseOnDemand]: 238/267 looper letters, 347 selfloop transitions, 88 changer transitions 0/576 dead transitions. [2022-11-21 14:03:53,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 576 transitions, 2719 flow [2022-11-21 14:03:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 14:03:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-21 14:03:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 8315 transitions. [2022-11-21 14:03:53,390 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6355575938240464 [2022-11-21 14:03:53,390 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 8315 transitions. [2022-11-21 14:03:53,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 8315 transitions. [2022-11-21 14:03:53,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:53,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 8315 transitions. [2022-11-21 14:03:53,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 169.69387755102042) internal successors, (8315), 49 states have internal predecessors, (8315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:53,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 267.0) internal successors, (13350), 50 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:53,448 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 267.0) internal successors, (13350), 50 states have internal predecessors, (13350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:53,449 INFO L175 Difference]: Start difference. First operand has 268 places, 240 transitions, 630 flow. Second operand 49 states and 8315 transitions. [2022-11-21 14:03:53,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 576 transitions, 2719 flow [2022-11-21 14:03:53,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 576 transitions, 2568 flow, removed 51 selfloop flow, removed 9 redundant places. [2022-11-21 14:03:53,479 INFO L231 Difference]: Finished difference. Result has 327 places, 322 transitions, 1335 flow [2022-11-21 14:03:53,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1335, PETRI_PLACES=327, PETRI_TRANSITIONS=322} [2022-11-21 14:03:53,481 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 86 predicate places. [2022-11-21 14:03:53,481 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 322 transitions, 1335 flow [2022-11-21 14:03:53,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 168.1764705882353) internal successors, (5718), 34 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:53,484 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:53,484 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:53,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 14:03:53,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 14:03:53,692 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)] === [2022-11-21 14:03:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1301148255, now seen corresponding path program 3 times [2022-11-21 14:03:53,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:53,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111991646] [2022-11-21 14:03:53,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:53,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:03:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:03:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 14:03:55,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:03:55,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111991646] [2022-11-21 14:03:55,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111991646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:03:55,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:03:55,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-21 14:03:55,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839796339] [2022-11-21 14:03:55,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:03:55,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 14:03:55,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:03:55,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 14:03:55,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-21 14:03:55,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 267 [2022-11-21 14:03:55,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 322 transitions, 1335 flow. Second operand has 16 states, 16 states have (on average 142.3125) internal successors, (2277), 16 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:55,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:03:55,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 267 [2022-11-21 14:03:55,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:03:59,539 INFO L130 PetriNetUnfolder]: 5566/10235 cut-off events. [2022-11-21 14:03:59,539 INFO L131 PetriNetUnfolder]: For 32430/32460 co-relation queries the response was YES. [2022-11-21 14:03:59,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30224 conditions, 10235 events. 5566/10235 cut-off events. For 32430/32460 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 74958 event pairs, 2005 based on Foata normal form. 152/9943 useless extension candidates. Maximal degree in co-relation 30182. Up to 5443 conditions per place. [2022-11-21 14:03:59,779 INFO L137 encePairwiseOnDemand]: 240/267 looper letters, 204 selfloop transitions, 47 changer transitions 1/392 dead transitions. [2022-11-21 14:03:59,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 392 transitions, 2238 flow [2022-11-21 14:03:59,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-21 14:03:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-21 14:03:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2732 transitions. [2022-11-21 14:03:59,789 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5385373546225113 [2022-11-21 14:03:59,789 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2732 transitions. [2022-11-21 14:03:59,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2732 transitions. [2022-11-21 14:03:59,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:03:59,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2732 transitions. [2022-11-21 14:03:59,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 143.78947368421052) internal successors, (2732), 19 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:59,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:59,806 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 267.0) internal successors, (5340), 20 states have internal predecessors, (5340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:59,806 INFO L175 Difference]: Start difference. First operand has 327 places, 322 transitions, 1335 flow. Second operand 19 states and 2732 transitions. [2022-11-21 14:03:59,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 392 transitions, 2238 flow [2022-11-21 14:03:59,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 392 transitions, 1898 flow, removed 154 selfloop flow, removed 12 redundant places. [2022-11-21 14:03:59,913 INFO L231 Difference]: Finished difference. Result has 335 places, 330 transitions, 1289 flow [2022-11-21 14:03:59,914 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1289, PETRI_PLACES=335, PETRI_TRANSITIONS=330} [2022-11-21 14:03:59,915 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 94 predicate places. [2022-11-21 14:03:59,915 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 330 transitions, 1289 flow [2022-11-21 14:03:59,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 142.3125) internal successors, (2277), 16 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:03:59,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:03:59,918 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:03:59,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 14:03:59,918 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)] === [2022-11-21 14:03:59,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:03:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1946695843, now seen corresponding path program 4 times [2022-11-21 14:03:59,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:03:59,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766434798] [2022-11-21 14:03:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:03:59,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:04:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:04:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 14:04:01,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:04:01,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766434798] [2022-11-21 14:04:01,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766434798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 14:04:01,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 14:04:01,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-21 14:04:01,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827118081] [2022-11-21 14:04:01,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 14:04:01,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-21 14:04:01,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:04:01,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-21 14:04:01,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-21 14:04:01,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 267 [2022-11-21 14:04:01,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 330 transitions, 1289 flow. Second operand has 13 states, 13 states have (on average 185.84615384615384) internal successors, (2416), 13 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) [2022-11-21 14:04:01,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:04:01,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 267 [2022-11-21 14:04:01,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:04:03,884 INFO L130 PetriNetUnfolder]: 3502/8086 cut-off events. [2022-11-21 14:04:03,885 INFO L131 PetriNetUnfolder]: For 19986/20346 co-relation queries the response was YES. [2022-11-21 14:04:03,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21120 conditions, 8086 events. 3502/8086 cut-off events. For 19986/20346 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 67594 event pairs, 867 based on Foata normal form. 163/7968 useless extension candidates. Maximal degree in co-relation 21076. Up to 3051 conditions per place. [2022-11-21 14:04:04,007 INFO L137 encePairwiseOnDemand]: 242/267 looper letters, 152 selfloop transitions, 51 changer transitions 0/382 dead transitions. [2022-11-21 14:04:04,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 382 transitions, 1945 flow [2022-11-21 14:04:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 14:04:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 14:04:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3348 transitions. [2022-11-21 14:04:04,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6966292134831461 [2022-11-21 14:04:04,014 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3348 transitions. [2022-11-21 14:04:04,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3348 transitions. [2022-11-21 14:04:04,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:04:04,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3348 transitions. [2022-11-21 14:04:04,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:04,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:04,030 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:04,030 INFO L175 Difference]: Start difference. First operand has 335 places, 330 transitions, 1289 flow. Second operand 18 states and 3348 transitions. [2022-11-21 14:04:04,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 382 transitions, 1945 flow [2022-11-21 14:04:04,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 382 transitions, 1872 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-11-21 14:04:04,092 INFO L231 Difference]: Finished difference. Result has 338 places, 335 transitions, 1387 flow [2022-11-21 14:04:04,092 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1387, PETRI_PLACES=338, PETRI_TRANSITIONS=335} [2022-11-21 14:04:04,093 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 97 predicate places. [2022-11-21 14:04:04,093 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 335 transitions, 1387 flow [2022-11-21 14:04:04,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.84615384615384) internal successors, (2416), 13 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) [2022-11-21 14:04:04,094 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:04:04,095 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:04:04,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 14:04:04,095 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)] === [2022-11-21 14:04:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:04:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash -579700131, now seen corresponding path program 1 times [2022-11-21 14:04:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:04:04,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551537146] [2022-11-21 14:04:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:04:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:04:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:04:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 14:04:05,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:04:05,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551537146] [2022-11-21 14:04:05,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551537146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:04:05,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793742183] [2022-11-21 14:04:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:04:05,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:04:05,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:04:05,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:04:05,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 14:04:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:04:05,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 14:04:05,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:04:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 14:04:06,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:04:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 14:04:06,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793742183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:04:06,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:04:06,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-11-21 14:04:06,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634249194] [2022-11-21 14:04:06,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:04:06,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 14:04:06,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:04:06,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 14:04:06,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2022-11-21 14:04:06,854 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-11-21 14:04:06,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 335 transitions, 1387 flow. Second operand has 26 states, 26 states have (on average 196.19230769230768) internal successors, (5101), 26 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:06,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:04:06,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-11-21 14:04:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:04:08,775 INFO L130 PetriNetUnfolder]: 1103/4228 cut-off events. [2022-11-21 14:04:08,776 INFO L131 PetriNetUnfolder]: For 6957/7075 co-relation queries the response was YES. [2022-11-21 14:04:08,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10183 conditions, 4228 events. 1103/4228 cut-off events. For 6957/7075 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 33936 event pairs, 373 based on Foata normal form. 90/4236 useless extension candidates. Maximal degree in co-relation 10139. Up to 1101 conditions per place. [2022-11-21 14:04:08,846 INFO L137 encePairwiseOnDemand]: 247/267 looper letters, 117 selfloop transitions, 26 changer transitions 85/429 dead transitions. [2022-11-21 14:04:08,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 429 transitions, 2398 flow [2022-11-21 14:04:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 14:04:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-21 14:04:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3945 transitions. [2022-11-21 14:04:08,855 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7387640449438202 [2022-11-21 14:04:08,855 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3945 transitions. [2022-11-21 14:04:08,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3945 transitions. [2022-11-21 14:04:08,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:04:08,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3945 transitions. [2022-11-21 14:04:08,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.25) internal successors, (3945), 20 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:08,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:08,879 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:08,879 INFO L175 Difference]: Start difference. First operand has 338 places, 335 transitions, 1387 flow. Second operand 20 states and 3945 transitions. [2022-11-21 14:04:08,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 429 transitions, 2398 flow [2022-11-21 14:04:08,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 429 transitions, 2299 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-11-21 14:04:08,920 INFO L231 Difference]: Finished difference. Result has 348 places, 339 transitions, 1401 flow [2022-11-21 14:04:08,921 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1401, PETRI_PLACES=348, PETRI_TRANSITIONS=339} [2022-11-21 14:04:08,923 INFO L288 CegarLoopForPetriNet]: 241 programPoint places, 107 predicate places. [2022-11-21 14:04:08,923 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 339 transitions, 1401 flow [2022-11-21 14:04:08,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 196.19230769230768) internal successors, (5101), 26 states have internal predecessors, (5101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:08,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:04:08,926 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:04:08,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 14:04:09,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:04:09,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-21 14:04:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:04:09,133 INFO L85 PathProgramCache]: Analyzing trace with hash -524623909, now seen corresponding path program 2 times [2022-11-21 14:04:09,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:04:09,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975156012] [2022-11-21 14:04:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:04:09,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:04:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:04:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 14:04:14,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:04:14,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975156012] [2022-11-21 14:04:14,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975156012] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:04:14,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995160881] [2022-11-21 14:04:14,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:04:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:04:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:04:14,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:04:14,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ac01166c-087e-4355-81a4-6a6017514002/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 14:04:14,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:04:14,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:04:14,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-21 14:04:14,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:04:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 14:04:19,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:04:20,151 INFO L321 Elim1Store]: treesize reduction 4, result has 96.0 percent of original size [2022-11-21 14:04:20,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-11-21 14:04:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 14:04:22,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995160881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:04:22,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:04:22,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26, 18] total 76 [2022-11-21 14:04:22,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374279072] [2022-11-21 14:04:22,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:04:22,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-21 14:04:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:04:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-21 14:04:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=5191, Unknown=0, NotChecked=0, Total=5700 [2022-11-21 14:04:22,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2022-11-21 14:04:22,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 339 transitions, 1401 flow. Second operand has 76 states, 76 states have (on average 151.85526315789474) internal successors, (11541), 76 states have internal predecessors, (11541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:04:22,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:04:22,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2022-11-21 14:04:22,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 14:05:12,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-21 14:05:29,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]