./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro --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 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf --- 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-8393723 [2022-11-18 19:52:03,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:52:03,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:52:03,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:52:03,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:52:03,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:52:03,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:52:03,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:52:03,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:52:03,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:52:03,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:52:03,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:52:03,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:52:03,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:52:03,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:52:03,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:52:03,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:52:03,131 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:52:03,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:52:03,136 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:52:03,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:52:03,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:52:03,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:52:03,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:52:03,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:52:03,152 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:52:03,153 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:52:03,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:52:03,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:52:03,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:52:03,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:52:03,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:52:03,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:52:03,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:52:03,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:52:03,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:52:03,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:52:03,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:52:03,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:52:03,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:52:03,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:52:03,165 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:52:03,197 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:52:03,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:52:03,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:52:03,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:52:03,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:52:03,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:52:03,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:52:03,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:52:03,200 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:52:03,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:52:03,202 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:52:03,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:52:03,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:52:03,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:52:03,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:52:03,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:52:03,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:52:03,203 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:52:03,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:52:03,204 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:52:03,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:52:03,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:52:03,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:52:03,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:52:03,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:52:03,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:52:03,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:52:03,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:52:03,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:52:03,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:52:03,206 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:52:03,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:52:03,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:52:03,207 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_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faf759f4f4392e84815a483ab24e4497f918cd291dc733acf407d398902eccf [2022-11-18 19:52:03,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:52:03,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:52:03,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:52:03,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:52:03,469 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:52:03,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-11-18 19:52:03,538 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/data/994be7fd7/0ae7eded9b68497d8c8ad56dc8d71c74/FLAG6bcd34003 [2022-11-18 19:52:04,001 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:52:04,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2022-11-18 19:52:04,009 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/data/994be7fd7/0ae7eded9b68497d8c8ad56dc8d71c74/FLAG6bcd34003 [2022-11-18 19:52:04,025 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/data/994be7fd7/0ae7eded9b68497d8c8ad56dc8d71c74 [2022-11-18 19:52:04,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:52:04,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:52:04,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:52:04,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:52:04,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:52:04,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241b4657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04, skipping insertion in model container [2022-11-18 19:52:04,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:52:04,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:52:04,313 WARN L234 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_e726cc03-7b2b-4572-8144-716779acfe65/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-11-18 19:52:04,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:52:04,334 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:52:04,374 WARN L234 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_e726cc03-7b2b-4572-8144-716779acfe65/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2591,2604] [2022-11-18 19:52:04,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:52:04,393 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:52:04,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04 WrapperNode [2022-11-18 19:52:04,394 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:52:04,395 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:52:04,395 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:52:04,396 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:52:04,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,444 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-11-18 19:52:04,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:52:04,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:52:04,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:52:04,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:52:04,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,478 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:52:04,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:52:04,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:52:04,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:52:04,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (1/1) ... [2022-11-18 19:52:04,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:52:04,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:04,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:52:04,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:52:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:52:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:52:04,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:52:04,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:52:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:52:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 19:52:04,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 19:52:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:52:04,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:52:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:52:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:52:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:52:04,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:52:04,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:52:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:52:04,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:52:04,580 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:52:04,673 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:52:04,674 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:52:04,881 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:52:04,966 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:52:04,967 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 19:52:04,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:52:04 BoogieIcfgContainer [2022-11-18 19:52:04,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:52:04,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:52:04,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:52:05,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:52:05,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:52:04" (1/3) ... [2022-11-18 19:52:05,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5894b1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:52:05, skipping insertion in model container [2022-11-18 19:52:05,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:52:04" (2/3) ... [2022-11-18 19:52:05,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5894b1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:52:05, skipping insertion in model container [2022-11-18 19:52:05,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:52:04" (3/3) ... [2022-11-18 19:52:05,004 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2022-11-18 19:52:05,013 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:52:05,033 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:52:05,033 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:52:05,033 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:52:05,156 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 19:52:05,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 97 transitions, 218 flow [2022-11-18 19:52:05,265 INFO L130 PetriNetUnfolder]: 7/94 cut-off events. [2022-11-18 19:52:05,265 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:52:05,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 94 events. 7/94 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2022-11-18 19:52:05,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 97 transitions, 218 flow [2022-11-18 19:52:05,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 83 transitions, 184 flow [2022-11-18 19:52:05,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:52:05,294 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;@7f9e2b25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:52:05,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 19:52:05,341 INFO L130 PetriNetUnfolder]: 7/82 cut-off events. [2022-11-18 19:52:05,341 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 19:52:05,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:05,342 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] [2022-11-18 19:52:05,343 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)] === [2022-11-18 19:52:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:05,353 INFO L85 PathProgramCache]: Analyzing trace with hash 64157928, now seen corresponding path program 1 times [2022-11-18 19:52:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:05,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352865818] [2022-11-18 19:52:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:05,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:05,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:05,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352865818] [2022-11-18 19:52:05,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352865818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:05,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:05,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:52:05,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366284306] [2022-11-18 19:52:05,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:05,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:52:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:05,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:52:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:52:05,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 97 [2022-11-18 19:52:05,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 184 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:05,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:05,777 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 97 [2022-11-18 19:52:05,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:05,847 INFO L130 PetriNetUnfolder]: 26/138 cut-off events. [2022-11-18 19:52:05,847 INFO L131 PetriNetUnfolder]: For 28/29 co-relation queries the response was YES. [2022-11-18 19:52:05,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 138 events. 26/138 cut-off events. For 28/29 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 260 event pairs, 7 based on Foata normal form. 25/148 useless extension candidates. Maximal degree in co-relation 127. Up to 39 conditions per place. [2022-11-18 19:52:05,851 INFO L137 encePairwiseOnDemand]: 93/97 looper letters, 9 selfloop transitions, 0 changer transitions 1/79 dead transitions. [2022-11-18 19:52:05,851 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 194 flow [2022-11-18 19:52:05,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:52:05,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:52:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 179 transitions. [2022-11-18 19:52:05,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9226804123711341 [2022-11-18 19:52:05,865 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 179 transitions. [2022-11-18 19:52:05,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 179 transitions. [2022-11-18 19:52:05,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:05,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 179 transitions. [2022-11-18 19:52:05,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.5) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:05,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:05,877 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:05,879 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 184 flow. Second operand 2 states and 179 transitions. [2022-11-18 19:52:05,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 194 flow [2022-11-18 19:52:05,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 182 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 19:52:05,886 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 162 flow [2022-11-18 19:52:05,888 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=162, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2022-11-18 19:52:05,891 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2022-11-18 19:52:05,892 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 162 flow [2022-11-18 19:52:05,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:05,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:05,892 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] [2022-11-18 19:52:05,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:52:05,893 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)] === [2022-11-18 19:52:05,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:05,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1685090523, now seen corresponding path program 1 times [2022-11-18 19:52:05,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:05,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668413170] [2022-11-18 19:52:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:05,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:06,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668413170] [2022-11-18 19:52:06,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668413170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:06,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:06,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:52:06,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668961316] [2022-11-18 19:52:06,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:06,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:06,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:06,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:06,715 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 97 [2022-11-18 19:52:06,716 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 162 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:06,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:06,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 97 [2022-11-18 19:52:06,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:06,857 INFO L130 PetriNetUnfolder]: 34/192 cut-off events. [2022-11-18 19:52:06,857 INFO L131 PetriNetUnfolder]: For 12/13 co-relation queries the response was YES. [2022-11-18 19:52:06,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 192 events. 34/192 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 487 event pairs, 1 based on Foata normal form. 2/180 useless extension candidates. Maximal degree in co-relation 266. Up to 44 conditions per place. [2022-11-18 19:52:06,860 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 25 selfloop transitions, 7 changer transitions 4/99 dead transitions. [2022-11-18 19:52:06,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 284 flow [2022-11-18 19:52:06,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-11-18 19:52:06,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-11-18 19:52:06,865 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-11-18 19:52:06,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-11-18 19:52:06,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:06,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-11-18 19:52:06,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:06,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:06,874 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:06,874 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 162 flow. Second operand 6 states and 493 transitions. [2022-11-18 19:52:06,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 284 flow [2022-11-18 19:52:06,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:52:06,878 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 202 flow [2022-11-18 19:52:06,879 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2022-11-18 19:52:06,880 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2022-11-18 19:52:06,880 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 202 flow [2022-11-18 19:52:06,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:06,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:06,881 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:06,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:52:06,882 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)] === [2022-11-18 19:52:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:06,883 INFO L85 PathProgramCache]: Analyzing trace with hash -187386445, now seen corresponding path program 1 times [2022-11-18 19:52:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:06,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480178165] [2022-11-18 19:52:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:07,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:07,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480178165] [2022-11-18 19:52:07,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480178165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:07,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:07,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:52:07,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890308352] [2022-11-18 19:52:07,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:07,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:07,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:07,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:07,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:07,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:07,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:07,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:07,722 INFO L130 PetriNetUnfolder]: 297/760 cut-off events. [2022-11-18 19:52:07,722 INFO L131 PetriNetUnfolder]: For 129/134 co-relation queries the response was YES. [2022-11-18 19:52:07,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 760 events. 297/760 cut-off events. For 129/134 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4116 event pairs, 54 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1452. Up to 254 conditions per place. [2022-11-18 19:52:07,731 INFO L137 encePairwiseOnDemand]: 87/97 looper letters, 53 selfloop transitions, 20 changer transitions 0/130 dead transitions. [2022-11-18 19:52:07,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 486 flow [2022-11-18 19:52:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:52:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 19:52:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 636 transitions. [2022-11-18 19:52:07,735 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2022-11-18 19:52:07,735 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 636 transitions. [2022-11-18 19:52:07,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 636 transitions. [2022-11-18 19:52:07,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:07,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 636 transitions. [2022-11-18 19:52:07,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.5) internal successors, (636), 8 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:07,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:07,742 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:07,742 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 202 flow. Second operand 8 states and 636 transitions. [2022-11-18 19:52:07,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 486 flow [2022-11-18 19:52:07,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 130 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-18 19:52:07,747 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 330 flow [2022-11-18 19:52:07,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2022-11-18 19:52:07,748 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2022-11-18 19:52:07,748 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 330 flow [2022-11-18 19:52:07,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:07,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:07,749 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:07,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:52:07,749 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)] === [2022-11-18 19:52:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:07,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1242918831, now seen corresponding path program 2 times [2022-11-18 19:52:07,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:07,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518468171] [2022-11-18 19:52:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:07,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:08,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:08,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518468171] [2022-11-18 19:52:08,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518468171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:08,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:08,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:08,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957746618] [2022-11-18 19:52:08,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:08,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:08,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:08,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:08,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:08,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:08,302 INFO L130 PetriNetUnfolder]: 371/890 cut-off events. [2022-11-18 19:52:08,303 INFO L131 PetriNetUnfolder]: For 450/454 co-relation queries the response was YES. [2022-11-18 19:52:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 890 events. 371/890 cut-off events. For 450/454 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4799 event pairs, 71 based on Foata normal form. 18/843 useless extension candidates. Maximal degree in co-relation 2091. Up to 395 conditions per place. [2022-11-18 19:52:08,312 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 53 selfloop transitions, 21 changer transitions 2/133 dead transitions. [2022-11-18 19:52:08,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 133 transitions, 628 flow [2022-11-18 19:52:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 485 transitions. [2022-11-18 19:52:08,314 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-11-18 19:52:08,314 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 485 transitions. [2022-11-18 19:52:08,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 485 transitions. [2022-11-18 19:52:08,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:08,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 485 transitions. [2022-11-18 19:52:08,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:08,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:08,318 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:08,319 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 330 flow. Second operand 6 states and 485 transitions. [2022-11-18 19:52:08,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 133 transitions, 628 flow [2022-11-18 19:52:08,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 621 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:52:08,325 INFO L231 Difference]: Finished difference. Result has 104 places, 108 transitions, 469 flow [2022-11-18 19:52:08,325 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2022-11-18 19:52:08,326 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2022-11-18 19:52:08,326 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 469 flow [2022-11-18 19:52:08,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 5 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:08,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:08,327 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:08,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:52:08,328 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)] === [2022-11-18 19:52:08,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:08,328 INFO L85 PathProgramCache]: Analyzing trace with hash -871030193, now seen corresponding path program 3 times [2022-11-18 19:52:08,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:08,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594448640] [2022-11-18 19:52:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:08,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:08,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:08,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594448640] [2022-11-18 19:52:08,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594448640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:08,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:08,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:52:08,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188783655] [2022-11-18 19:52:08,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:08,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:08,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:08,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:08,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:08,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:08,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:08,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:08,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:09,264 INFO L130 PetriNetUnfolder]: 576/1349 cut-off events. [2022-11-18 19:52:09,265 INFO L131 PetriNetUnfolder]: For 998/1042 co-relation queries the response was YES. [2022-11-18 19:52:09,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1349 events. 576/1349 cut-off events. For 998/1042 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8212 event pairs, 89 based on Foata normal form. 19/1295 useless extension candidates. Maximal degree in co-relation 3275. Up to 389 conditions per place. [2022-11-18 19:52:09,278 INFO L137 encePairwiseOnDemand]: 85/97 looper letters, 70 selfloop transitions, 38 changer transitions 2/167 dead transitions. [2022-11-18 19:52:09,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 917 flow [2022-11-18 19:52:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:52:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:52:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 731 transitions. [2022-11-18 19:52:09,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8373424971363116 [2022-11-18 19:52:09,281 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 731 transitions. [2022-11-18 19:52:09,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 731 transitions. [2022-11-18 19:52:09,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:09,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 731 transitions. [2022-11-18 19:52:09,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.22222222222223) internal successors, (731), 9 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,286 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 97.0) internal successors, (970), 10 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,286 INFO L175 Difference]: Start difference. First operand has 104 places, 108 transitions, 469 flow. Second operand 9 states and 731 transitions. [2022-11-18 19:52:09,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 917 flow [2022-11-18 19:52:09,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 167 transitions, 871 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-18 19:52:09,294 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 671 flow [2022-11-18 19:52:09,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=671, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2022-11-18 19:52:09,295 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 30 predicate places. [2022-11-18 19:52:09,296 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 671 flow [2022-11-18 19:52:09,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:09,296 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:09,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:52:09,297 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)] === [2022-11-18 19:52:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:09,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1724152015, now seen corresponding path program 4 times [2022-11-18 19:52:09,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:09,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92881873] [2022-11-18 19:52:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:09,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:09,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:09,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92881873] [2022-11-18 19:52:09,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92881873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:09,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:09,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:52:09,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359495608] [2022-11-18 19:52:09,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:09,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:09,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:09,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:09,537 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 671 flow. Second operand has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,537 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:09,537 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:09,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:09,891 INFO L130 PetriNetUnfolder]: 594/1403 cut-off events. [2022-11-18 19:52:09,891 INFO L131 PetriNetUnfolder]: For 2229/2242 co-relation queries the response was YES. [2022-11-18 19:52:09,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3959 conditions, 1403 events. 594/1403 cut-off events. For 2229/2242 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8738 event pairs, 155 based on Foata normal form. 16/1316 useless extension candidates. Maximal degree in co-relation 3938. Up to 527 conditions per place. [2022-11-18 19:52:09,909 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 64 selfloop transitions, 37 changer transitions 2/160 dead transitions. [2022-11-18 19:52:09,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1072 flow [2022-11-18 19:52:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:52:09,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 19:52:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2022-11-18 19:52:09,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8234536082474226 [2022-11-18 19:52:09,912 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2022-11-18 19:52:09,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2022-11-18 19:52:09,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:09,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2022-11-18 19:52:09,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,917 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,917 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 671 flow. Second operand 8 states and 639 transitions. [2022-11-18 19:52:09,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1072 flow [2022-11-18 19:52:09,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 160 transitions, 1052 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-18 19:52:09,934 INFO L231 Difference]: Finished difference. Result has 124 places, 128 transitions, 818 flow [2022-11-18 19:52:09,935 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=128} [2022-11-18 19:52:09,938 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 38 predicate places. [2022-11-18 19:52:09,938 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 128 transitions, 818 flow [2022-11-18 19:52:09,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.66666666666667) internal successors, (442), 6 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:09,940 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:09,941 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:09,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:52:09,942 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)] === [2022-11-18 19:52:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash 552510010, now seen corresponding path program 1 times [2022-11-18 19:52:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:09,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132152003] [2022-11-18 19:52:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:09,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:10,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:10,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132152003] [2022-11-18 19:52:10,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132152003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:10,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:10,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:52:10,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359645434] [2022-11-18 19:52:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:10,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:10,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:10,306 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:10,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 128 transitions, 818 flow. Second operand has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:10,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:10,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:10,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:10,742 INFO L130 PetriNetUnfolder]: 671/1555 cut-off events. [2022-11-18 19:52:10,743 INFO L131 PetriNetUnfolder]: For 3107/3129 co-relation queries the response was YES. [2022-11-18 19:52:10,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4726 conditions, 1555 events. 671/1555 cut-off events. For 3107/3129 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9899 event pairs, 158 based on Foata normal form. 25/1491 useless extension candidates. Maximal degree in co-relation 4701. Up to 579 conditions per place. [2022-11-18 19:52:10,760 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 82 selfloop transitions, 30 changer transitions 2/171 dead transitions. [2022-11-18 19:52:10,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 171 transitions, 1312 flow [2022-11-18 19:52:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:52:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:52:10,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 562 transitions. [2022-11-18 19:52:10,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8276877761413843 [2022-11-18 19:52:10,763 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 562 transitions. [2022-11-18 19:52:10,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 562 transitions. [2022-11-18 19:52:10,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:10,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 562 transitions. [2022-11-18 19:52:10,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.28571428571429) internal successors, (562), 7 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:10,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:10,768 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:10,768 INFO L175 Difference]: Start difference. First operand has 124 places, 128 transitions, 818 flow. Second operand 7 states and 562 transitions. [2022-11-18 19:52:10,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 171 transitions, 1312 flow [2022-11-18 19:52:10,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1228 flow, removed 4 selfloop flow, removed 5 redundant places. [2022-11-18 19:52:10,786 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 889 flow [2022-11-18 19:52:10,787 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=889, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2022-11-18 19:52:10,788 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2022-11-18 19:52:10,789 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 889 flow [2022-11-18 19:52:10,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 73.83333333333333) internal successors, (443), 6 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:10,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:10,790 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:10,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:52:10,790 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)] === [2022-11-18 19:52:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:10,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2003174178, now seen corresponding path program 2 times [2022-11-18 19:52:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:10,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094314832] [2022-11-18 19:52:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:10,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:11,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:11,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094314832] [2022-11-18 19:52:11,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094314832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:11,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:11,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:11,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095567472] [2022-11-18 19:52:11,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:11,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:11,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:11,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:11,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:11,101 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:11,102 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 889 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,102 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:11,102 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:11,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:11,583 INFO L130 PetriNetUnfolder]: 677/1571 cut-off events. [2022-11-18 19:52:11,584 INFO L131 PetriNetUnfolder]: For 4096/4134 co-relation queries the response was YES. [2022-11-18 19:52:11,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5176 conditions, 1571 events. 677/1571 cut-off events. For 4096/4134 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10085 event pairs, 200 based on Foata normal form. 12/1488 useless extension candidates. Maximal degree in co-relation 5148. Up to 948 conditions per place. [2022-11-18 19:52:11,607 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 67 selfloop transitions, 25 changer transitions 0/149 dead transitions. [2022-11-18 19:52:11,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 149 transitions, 1154 flow [2022-11-18 19:52:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:52:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:52:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 405 transitions. [2022-11-18 19:52:11,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-11-18 19:52:11,610 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 405 transitions. [2022-11-18 19:52:11,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 405 transitions. [2022-11-18 19:52:11,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:11,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 405 transitions. [2022-11-18 19:52:11,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,614 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,614 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 889 flow. Second operand 5 states and 405 transitions. [2022-11-18 19:52:11,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 149 transitions, 1154 flow [2022-11-18 19:52:11,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 149 transitions, 1131 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-18 19:52:11,635 INFO L231 Difference]: Finished difference. Result has 134 places, 133 transitions, 969 flow [2022-11-18 19:52:11,635 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=969, PETRI_PLACES=134, PETRI_TRANSITIONS=133} [2022-11-18 19:52:11,636 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2022-11-18 19:52:11,636 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 133 transitions, 969 flow [2022-11-18 19:52:11,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:11,637 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:11,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:52:11,637 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)] === [2022-11-18 19:52:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1258106434, now seen corresponding path program 1 times [2022-11-18 19:52:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:11,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602890639] [2022-11-18 19:52:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:11,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:11,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602890639] [2022-11-18 19:52:11,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602890639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:11,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:11,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:11,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232252910] [2022-11-18 19:52:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:11,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-18 19:52:11,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 133 transitions, 969 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:11,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:11,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-18 19:52:11,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:12,708 INFO L130 PetriNetUnfolder]: 1228/2857 cut-off events. [2022-11-18 19:52:12,709 INFO L131 PetriNetUnfolder]: For 9792/10021 co-relation queries the response was YES. [2022-11-18 19:52:12,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9955 conditions, 2857 events. 1228/2857 cut-off events. For 9792/10021 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21964 event pairs, 203 based on Foata normal form. 65/2653 useless extension candidates. Maximal degree in co-relation 9924. Up to 1058 conditions per place. [2022-11-18 19:52:12,747 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 67 selfloop transitions, 72 changer transitions 0/207 dead transitions. [2022-11-18 19:52:12,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 207 transitions, 1947 flow [2022-11-18 19:52:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:12,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 497 transitions. [2022-11-18 19:52:12,750 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8539518900343642 [2022-11-18 19:52:12,750 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 497 transitions. [2022-11-18 19:52:12,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 497 transitions. [2022-11-18 19:52:12,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:12,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 497 transitions. [2022-11-18 19:52:12,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.83333333333333) internal successors, (497), 6 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:12,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:12,753 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:12,754 INFO L175 Difference]: Start difference. First operand has 134 places, 133 transitions, 969 flow. Second operand 6 states and 497 transitions. [2022-11-18 19:52:12,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 207 transitions, 1947 flow [2022-11-18 19:52:12,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 207 transitions, 1887 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 19:52:12,803 INFO L231 Difference]: Finished difference. Result has 139 places, 171 transitions, 1567 flow [2022-11-18 19:52:12,804 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=139, PETRI_TRANSITIONS=171} [2022-11-18 19:52:12,805 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 53 predicate places. [2022-11-18 19:52:12,805 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 171 transitions, 1567 flow [2022-11-18 19:52:12,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:12,805 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:12,806 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:12,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 19:52:12,806 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)] === [2022-11-18 19:52:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:12,807 INFO L85 PathProgramCache]: Analyzing trace with hash 449066326, now seen corresponding path program 2 times [2022-11-18 19:52:12,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:12,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882891471] [2022-11-18 19:52:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:12,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:13,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:13,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882891471] [2022-11-18 19:52:13,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882891471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:13,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:13,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:13,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693768253] [2022-11-18 19:52:13,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:13,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:13,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:13,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:13,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:13,076 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-18 19:52:13,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 171 transitions, 1567 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:13,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:13,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-18 19:52:13,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:14,016 INFO L130 PetriNetUnfolder]: 1575/3588 cut-off events. [2022-11-18 19:52:14,016 INFO L131 PetriNetUnfolder]: For 16000/16324 co-relation queries the response was YES. [2022-11-18 19:52:14,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14478 conditions, 3588 events. 1575/3588 cut-off events. For 16000/16324 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28641 event pairs, 146 based on Foata normal form. 121/3597 useless extension candidates. Maximal degree in co-relation 14445. Up to 1111 conditions per place. [2022-11-18 19:52:14,075 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 125 selfloop transitions, 120 changer transitions 0/313 dead transitions. [2022-11-18 19:52:14,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 313 transitions, 3873 flow [2022-11-18 19:52:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 491 transitions. [2022-11-18 19:52:14,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8436426116838488 [2022-11-18 19:52:14,078 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 491 transitions. [2022-11-18 19:52:14,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 491 transitions. [2022-11-18 19:52:14,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:14,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 491 transitions. [2022-11-18 19:52:14,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.83333333333333) internal successors, (491), 6 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:14,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:14,082 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:14,082 INFO L175 Difference]: Start difference. First operand has 139 places, 171 transitions, 1567 flow. Second operand 6 states and 491 transitions. [2022-11-18 19:52:14,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 313 transitions, 3873 flow [2022-11-18 19:52:14,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 313 transitions, 3873 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:52:14,207 INFO L231 Difference]: Finished difference. Result has 148 places, 244 transitions, 3014 flow [2022-11-18 19:52:14,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=1567, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3014, PETRI_PLACES=148, PETRI_TRANSITIONS=244} [2022-11-18 19:52:14,209 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 62 predicate places. [2022-11-18 19:52:14,209 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 244 transitions, 3014 flow [2022-11-18 19:52:14,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:14,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:14,210 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 19:52:14,210 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)] === [2022-11-18 19:52:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1331398698, now seen corresponding path program 3 times [2022-11-18 19:52:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:14,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364884349] [2022-11-18 19:52:14,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:14,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:14,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364884349] [2022-11-18 19:52:14,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364884349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:14,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:14,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:14,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647739486] [2022-11-18 19:52:14,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:14,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:14,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:14,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:14,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:14,629 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-18 19:52:14,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 244 transitions, 3014 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:14,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:14,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-18 19:52:14,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:15,817 INFO L130 PetriNetUnfolder]: 1618/3806 cut-off events. [2022-11-18 19:52:15,817 INFO L131 PetriNetUnfolder]: For 21712/22213 co-relation queries the response was YES. [2022-11-18 19:52:15,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16958 conditions, 3806 events. 1618/3806 cut-off events. For 21712/22213 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30885 event pairs, 244 based on Foata normal form. 167/3837 useless extension candidates. Maximal degree in co-relation 16920. Up to 1202 conditions per place. [2022-11-18 19:52:15,870 INFO L137 encePairwiseOnDemand]: 87/97 looper letters, 70 selfloop transitions, 136 changer transitions 0/274 dead transitions. [2022-11-18 19:52:15,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 274 transitions, 3619 flow [2022-11-18 19:52:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 486 transitions. [2022-11-18 19:52:15,873 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8350515463917526 [2022-11-18 19:52:15,873 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 486 transitions. [2022-11-18 19:52:15,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 486 transitions. [2022-11-18 19:52:15,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:15,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 486 transitions. [2022-11-18 19:52:15,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 81.0) internal successors, (486), 6 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:15,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:15,877 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:15,877 INFO L175 Difference]: Start difference. First operand has 148 places, 244 transitions, 3014 flow. Second operand 6 states and 486 transitions. [2022-11-18 19:52:15,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 274 transitions, 3619 flow [2022-11-18 19:52:15,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 274 transitions, 3611 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-18 19:52:15,966 INFO L231 Difference]: Finished difference. Result has 156 places, 251 transitions, 3513 flow [2022-11-18 19:52:15,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3006, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3513, PETRI_PLACES=156, PETRI_TRANSITIONS=251} [2022-11-18 19:52:15,967 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 70 predicate places. [2022-11-18 19:52:15,967 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 251 transitions, 3513 flow [2022-11-18 19:52:15,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:15,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:15,968 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:15,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:52:15,969 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)] === [2022-11-18 19:52:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash 103117984, now seen corresponding path program 4 times [2022-11-18 19:52:15,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:15,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731650144] [2022-11-18 19:52:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:15,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:16,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:16,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731650144] [2022-11-18 19:52:16,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731650144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:16,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:16,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:16,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366716066] [2022-11-18 19:52:16,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:16,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:16,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:16,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:16,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:16,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-18 19:52:16,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 251 transitions, 3513 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:16,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:16,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-18 19:52:16,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:17,453 INFO L130 PetriNetUnfolder]: 1601/3781 cut-off events. [2022-11-18 19:52:17,453 INFO L131 PetriNetUnfolder]: For 27861/28305 co-relation queries the response was YES. [2022-11-18 19:52:17,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18251 conditions, 3781 events. 1601/3781 cut-off events. For 27861/28305 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30914 event pairs, 161 based on Foata normal form. 137/3798 useless extension candidates. Maximal degree in co-relation 18209. Up to 1179 conditions per place. [2022-11-18 19:52:17,497 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 101 selfloop transitions, 138 changer transitions 3/310 dead transitions. [2022-11-18 19:52:17,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 310 transitions, 4794 flow [2022-11-18 19:52:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:52:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:52:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2022-11-18 19:52:17,499 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8577319587628865 [2022-11-18 19:52:17,500 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2022-11-18 19:52:17,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2022-11-18 19:52:17,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:17,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2022-11-18 19:52:17,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:17,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:17,503 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:17,503 INFO L175 Difference]: Start difference. First operand has 156 places, 251 transitions, 3513 flow. Second operand 5 states and 416 transitions. [2022-11-18 19:52:17,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 310 transitions, 4794 flow [2022-11-18 19:52:17,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 310 transitions, 4620 flow, removed 14 selfloop flow, removed 2 redundant places. [2022-11-18 19:52:17,631 INFO L231 Difference]: Finished difference. Result has 161 places, 270 transitions, 4162 flow [2022-11-18 19:52:17,631 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4162, PETRI_PLACES=161, PETRI_TRANSITIONS=270} [2022-11-18 19:52:17,633 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 75 predicate places. [2022-11-18 19:52:17,633 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 270 transitions, 4162 flow [2022-11-18 19:52:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:17,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:17,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:17,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 19:52:17,635 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)] === [2022-11-18 19:52:17,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:17,636 INFO L85 PathProgramCache]: Analyzing trace with hash 751375630, now seen corresponding path program 5 times [2022-11-18 19:52:17,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:17,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624449468] [2022-11-18 19:52:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:17,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:18,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:18,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624449468] [2022-11-18 19:52:18,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624449468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:18,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:18,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:18,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428057802] [2022-11-18 19:52:18,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:18,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:18,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:18,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:18,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-18 19:52:18,083 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 270 transitions, 4162 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:18,083 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:18,084 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-18 19:52:18,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:19,297 INFO L130 PetriNetUnfolder]: 1621/3984 cut-off events. [2022-11-18 19:52:19,297 INFO L131 PetriNetUnfolder]: For 31456/32021 co-relation queries the response was YES. [2022-11-18 19:52:19,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19871 conditions, 3984 events. 1621/3984 cut-off events. For 31456/32021 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33621 event pairs, 177 based on Foata normal form. 155/4011 useless extension candidates. Maximal degree in co-relation 19826. Up to 1308 conditions per place. [2022-11-18 19:52:19,354 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 82 selfloop transitions, 170 changer transitions 6/326 dead transitions. [2022-11-18 19:52:19,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 326 transitions, 5438 flow [2022-11-18 19:52:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 493 transitions. [2022-11-18 19:52:19,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8470790378006873 [2022-11-18 19:52:19,357 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 493 transitions. [2022-11-18 19:52:19,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 493 transitions. [2022-11-18 19:52:19,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:19,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 493 transitions. [2022-11-18 19:52:19,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 82.16666666666667) internal successors, (493), 6 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:19,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:19,361 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:19,362 INFO L175 Difference]: Start difference. First operand has 161 places, 270 transitions, 4162 flow. Second operand 6 states and 493 transitions. [2022-11-18 19:52:19,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 326 transitions, 5438 flow [2022-11-18 19:52:19,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 326 transitions, 5322 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-18 19:52:19,517 INFO L231 Difference]: Finished difference. Result has 167 places, 287 transitions, 4784 flow [2022-11-18 19:52:19,517 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4784, PETRI_PLACES=167, PETRI_TRANSITIONS=287} [2022-11-18 19:52:19,519 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 81 predicate places. [2022-11-18 19:52:19,519 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 287 transitions, 4784 flow [2022-11-18 19:52:19,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:19,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:19,520 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:19,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 19:52:19,520 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash 716376916, now seen corresponding path program 6 times [2022-11-18 19:52:19,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:19,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428004129] [2022-11-18 19:52:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:19,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:19,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428004129] [2022-11-18 19:52:19,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428004129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127067334] [2022-11-18 19:52:19,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 19:52:19,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:19,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:19,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:20,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:52:20,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 19:52:20,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:52:20,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:52:20,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:20,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:20,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127067334] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:20,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:52:20,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-11-18 19:52:20,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682630140] [2022-11-18 19:52:20,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:20,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:20,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:20,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:20,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:52:20,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-11-18 19:52:20,928 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 287 transitions, 4784 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:20,928 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:20,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-11-18 19:52:20,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:23,138 INFO L130 PetriNetUnfolder]: 3366/7858 cut-off events. [2022-11-18 19:52:23,138 INFO L131 PetriNetUnfolder]: For 65557/65557 co-relation queries the response was YES. [2022-11-18 19:52:23,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39234 conditions, 7858 events. 3366/7858 cut-off events. For 65557/65557 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 72706 event pairs, 190 based on Foata normal form. 18/7780 useless extension candidates. Maximal degree in co-relation 39187. Up to 1525 conditions per place. [2022-11-18 19:52:23,338 INFO L137 encePairwiseOnDemand]: 82/97 looper letters, 384 selfloop transitions, 166 changer transitions 3/608 dead transitions. [2022-11-18 19:52:23,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 608 transitions, 11034 flow [2022-11-18 19:52:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:52:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:52:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 573 transitions. [2022-11-18 19:52:23,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8438880706921944 [2022-11-18 19:52:23,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 573 transitions. [2022-11-18 19:52:23,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 573 transitions. [2022-11-18 19:52:23,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:23,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 573 transitions. [2022-11-18 19:52:23,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.85714285714286) internal successors, (573), 7 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:23,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:23,345 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:23,345 INFO L175 Difference]: Start difference. First operand has 167 places, 287 transitions, 4784 flow. Second operand 7 states and 573 transitions. [2022-11-18 19:52:23,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 608 transitions, 11034 flow [2022-11-18 19:52:23,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 608 transitions, 10904 flow, removed 65 selfloop flow, removed 0 redundant places. [2022-11-18 19:52:23,623 INFO L231 Difference]: Finished difference. Result has 178 places, 417 transitions, 7758 flow [2022-11-18 19:52:23,624 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7758, PETRI_PLACES=178, PETRI_TRANSITIONS=417} [2022-11-18 19:52:23,624 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 92 predicate places. [2022-11-18 19:52:23,625 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 417 transitions, 7758 flow [2022-11-18 19:52:23,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:23,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:23,625 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:23,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 19:52:23,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 19:52:23,832 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash -329411296, now seen corresponding path program 7 times [2022-11-18 19:52:23,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:23,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177190072] [2022-11-18 19:52:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:23,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:24,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:24,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177190072] [2022-11-18 19:52:24,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177190072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:24,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286511877] [2022-11-18 19:52:24,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 19:52:24,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:24,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:24,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:24,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:52:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 19:52:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:24,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:24,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286511877] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:24,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:52:24,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-11-18 19:52:24,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003498974] [2022-11-18 19:52:24,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:24,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-11-18 19:52:24,698 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 97 [2022-11-18 19:52:24,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 417 transitions, 7758 flow. Second operand has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:24,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:24,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 97 [2022-11-18 19:52:24,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:27,055 INFO L130 PetriNetUnfolder]: 3516/8354 cut-off events. [2022-11-18 19:52:27,056 INFO L131 PetriNetUnfolder]: For 89350/89402 co-relation queries the response was YES. [2022-11-18 19:52:27,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46807 conditions, 8354 events. 3516/8354 cut-off events. For 89350/89402 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 78742 event pairs, 482 based on Foata normal form. 15/8220 useless extension candidates. Maximal degree in co-relation 46755. Up to 2626 conditions per place. [2022-11-18 19:52:27,188 INFO L137 encePairwiseOnDemand]: 82/97 looper letters, 264 selfloop transitions, 226 changer transitions 5/550 dead transitions. [2022-11-18 19:52:27,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 550 transitions, 10498 flow [2022-11-18 19:52:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:52:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:52:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 570 transitions. [2022-11-18 19:52:27,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8394698085419735 [2022-11-18 19:52:27,191 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 570 transitions. [2022-11-18 19:52:27,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 570 transitions. [2022-11-18 19:52:27,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:27,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 570 transitions. [2022-11-18 19:52:27,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 81.42857142857143) internal successors, (570), 7 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:27,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:27,305 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:27,305 INFO L175 Difference]: Start difference. First operand has 178 places, 417 transitions, 7758 flow. Second operand 7 states and 570 transitions. [2022-11-18 19:52:27,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 550 transitions, 10498 flow [2022-11-18 19:52:27,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 550 transitions, 10371 flow, removed 57 selfloop flow, removed 1 redundant places. [2022-11-18 19:52:27,641 INFO L231 Difference]: Finished difference. Result has 189 places, 450 transitions, 9066 flow [2022-11-18 19:52:27,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=7643, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9066, PETRI_PLACES=189, PETRI_TRANSITIONS=450} [2022-11-18 19:52:27,642 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 103 predicate places. [2022-11-18 19:52:27,642 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 450 transitions, 9066 flow [2022-11-18 19:52:27,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.0) internal successors, (432), 6 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:27,643 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:27,643 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:27,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:52:27,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 19:52:27,847 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash 39199722, now seen corresponding path program 8 times [2022-11-18 19:52:27,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:27,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155604468] [2022-11-18 19:52:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:27,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155604468] [2022-11-18 19:52:28,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155604468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:28,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:28,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 19:52:28,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465409170] [2022-11-18 19:52:28,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:28,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:52:28,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:28,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:52:28,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 19:52:28,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-18 19:52:28,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 450 transitions, 9066 flow. Second operand has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:28,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:28,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-18 19:52:28,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:30,584 INFO L130 PetriNetUnfolder]: 3130/7944 cut-off events. [2022-11-18 19:52:30,585 INFO L131 PetriNetUnfolder]: For 119995/121213 co-relation queries the response was YES. [2022-11-18 19:52:30,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49654 conditions, 7944 events. 3130/7944 cut-off events. For 119995/121213 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 77659 event pairs, 425 based on Foata normal form. 318/8031 useless extension candidates. Maximal degree in co-relation 49597. Up to 1525 conditions per place. [2022-11-18 19:52:30,726 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 135 selfloop transitions, 363 changer transitions 4/588 dead transitions. [2022-11-18 19:52:30,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 588 transitions, 12933 flow [2022-11-18 19:52:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:52:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:52:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 580 transitions. [2022-11-18 19:52:30,731 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8541973490427098 [2022-11-18 19:52:30,731 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 580 transitions. [2022-11-18 19:52:30,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 580 transitions. [2022-11-18 19:52:30,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:30,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 580 transitions. [2022-11-18 19:52:30,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.85714285714286) internal successors, (580), 7 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:30,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:30,737 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 97.0) internal successors, (776), 8 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:30,738 INFO L175 Difference]: Start difference. First operand has 189 places, 450 transitions, 9066 flow. Second operand 7 states and 580 transitions. [2022-11-18 19:52:30,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 588 transitions, 12933 flow [2022-11-18 19:52:31,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 588 transitions, 12891 flow, removed 21 selfloop flow, removed 0 redundant places. [2022-11-18 19:52:31,182 INFO L231 Difference]: Finished difference. Result has 196 places, 520 transitions, 11960 flow [2022-11-18 19:52:31,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=9040, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11960, PETRI_PLACES=196, PETRI_TRANSITIONS=520} [2022-11-18 19:52:31,183 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 110 predicate places. [2022-11-18 19:52:31,183 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 520 transitions, 11960 flow [2022-11-18 19:52:31,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 75.5) internal successors, (453), 6 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:31,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:31,184 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:31,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 19:52:31,185 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 184225578, now seen corresponding path program 3 times [2022-11-18 19:52:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:31,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957785534] [2022-11-18 19:52:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957785534] [2022-11-18 19:52:31,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957785534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:31,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:31,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:31,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496374088] [2022-11-18 19:52:31,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:31,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:31,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:31,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:31,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:31,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:31,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 520 transitions, 11960 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:31,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:31,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:31,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:33,510 INFO L130 PetriNetUnfolder]: 3425/8583 cut-off events. [2022-11-18 19:52:33,510 INFO L131 PetriNetUnfolder]: For 142296/142561 co-relation queries the response was YES. [2022-11-18 19:52:33,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54711 conditions, 8583 events. 3425/8583 cut-off events. For 142296/142561 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 83422 event pairs, 823 based on Foata normal form. 48/8387 useless extension candidates. Maximal degree in co-relation 54652. Up to 4903 conditions per place. [2022-11-18 19:52:33,624 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 422 selfloop transitions, 59 changer transitions 10/562 dead transitions. [2022-11-18 19:52:33,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 562 transitions, 13544 flow [2022-11-18 19:52:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 476 transitions. [2022-11-18 19:52:33,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-11-18 19:52:33,627 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 476 transitions. [2022-11-18 19:52:33,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 476 transitions. [2022-11-18 19:52:33,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:33,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 476 transitions. [2022-11-18 19:52:33,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.33333333333333) internal successors, (476), 6 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:33,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:33,631 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:33,631 INFO L175 Difference]: Start difference. First operand has 196 places, 520 transitions, 11960 flow. Second operand 6 states and 476 transitions. [2022-11-18 19:52:33,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 562 transitions, 13544 flow [2022-11-18 19:52:33,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 562 transitions, 13378 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-18 19:52:33,988 INFO L231 Difference]: Finished difference. Result has 201 places, 513 transitions, 11779 flow [2022-11-18 19:52:33,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=11505, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11779, PETRI_PLACES=201, PETRI_TRANSITIONS=513} [2022-11-18 19:52:33,989 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 115 predicate places. [2022-11-18 19:52:33,989 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 513 transitions, 11779 flow [2022-11-18 19:52:33,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:33,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:33,990 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:33,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 19:52:33,991 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:33,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1787512, now seen corresponding path program 9 times [2022-11-18 19:52:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:33,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103620159] [2022-11-18 19:52:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:33,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:34,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:34,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103620159] [2022-11-18 19:52:34,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103620159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:34,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:34,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:34,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837969645] [2022-11-18 19:52:34,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:34,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:34,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:34,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:34,429 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 97 [2022-11-18 19:52:34,429 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 513 transitions, 11779 flow. Second operand has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:34,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:34,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 97 [2022-11-18 19:52:34,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:36,403 INFO L130 PetriNetUnfolder]: 2981/7440 cut-off events. [2022-11-18 19:52:36,403 INFO L131 PetriNetUnfolder]: For 122249/123411 co-relation queries the response was YES. [2022-11-18 19:52:36,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47902 conditions, 7440 events. 2981/7440 cut-off events. For 122249/123411 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 71611 event pairs, 221 based on Foata normal form. 306/7581 useless extension candidates. Maximal degree in co-relation 47839. Up to 2038 conditions per place. [2022-11-18 19:52:36,514 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 246 selfloop transitions, 231 changer transitions 8/570 dead transitions. [2022-11-18 19:52:36,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 570 transitions, 13621 flow [2022-11-18 19:52:36,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:52:36,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:52:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2022-11-18 19:52:36,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8494845360824742 [2022-11-18 19:52:36,517 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 412 transitions. [2022-11-18 19:52:36,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 412 transitions. [2022-11-18 19:52:36,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:36,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 412 transitions. [2022-11-18 19:52:36,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.4) internal successors, (412), 5 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:36,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:36,519 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 97.0) internal successors, (582), 6 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:36,519 INFO L175 Difference]: Start difference. First operand has 201 places, 513 transitions, 11779 flow. Second operand 5 states and 412 transitions. [2022-11-18 19:52:36,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 570 transitions, 13621 flow [2022-11-18 19:52:36,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 570 transitions, 13486 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-18 19:52:37,004 INFO L231 Difference]: Finished difference. Result has 204 places, 506 transitions, 12168 flow [2022-11-18 19:52:37,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=11577, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12168, PETRI_PLACES=204, PETRI_TRANSITIONS=506} [2022-11-18 19:52:37,005 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 118 predicate places. [2022-11-18 19:52:37,005 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 506 transitions, 12168 flow [2022-11-18 19:52:37,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.0) internal successors, (380), 5 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:37,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:37,005 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:37,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 19:52:37,006 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:37,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1225597636, now seen corresponding path program 10 times [2022-11-18 19:52:37,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:37,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378488804] [2022-11-18 19:52:37,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:37,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:37,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:37,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378488804] [2022-11-18 19:52:37,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378488804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:37,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180215893] [2022-11-18 19:52:37,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 19:52:37,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:37,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:37,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:37,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:52:37,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 19:52:37,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:52:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:52:37,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:37,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:52:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:38,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180215893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:52:38,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:52:38,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2022-11-18 19:52:38,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254001865] [2022-11-18 19:52:38,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:52:38,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:52:38,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:38,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:52:38,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:52:38,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-11-18 19:52:38,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 506 transitions, 12168 flow. Second operand has 16 states, 16 states have (on average 68.125) internal successors, (1090), 16 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:38,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:38,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-11-18 19:52:38,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:43,732 INFO L130 PetriNetUnfolder]: 6918/16634 cut-off events. [2022-11-18 19:52:43,732 INFO L131 PetriNetUnfolder]: For 256859/257377 co-relation queries the response was YES. [2022-11-18 19:52:43,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103137 conditions, 16634 events. 6918/16634 cut-off events. For 256859/257377 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 178650 event pairs, 794 based on Foata normal form. 364/16649 useless extension candidates. Maximal degree in co-relation 103073. Up to 4215 conditions per place. [2022-11-18 19:52:43,896 INFO L137 encePairwiseOnDemand]: 82/97 looper letters, 726 selfloop transitions, 261 changer transitions 10/1089 dead transitions. [2022-11-18 19:52:43,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1089 transitions, 26705 flow [2022-11-18 19:52:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 19:52:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-18 19:52:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1157 transitions. [2022-11-18 19:52:43,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7454896907216495 [2022-11-18 19:52:43,900 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1157 transitions. [2022-11-18 19:52:43,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1157 transitions. [2022-11-18 19:52:43,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:43,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1157 transitions. [2022-11-18 19:52:43,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 72.3125) internal successors, (1157), 16 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:43,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 97.0) internal successors, (1649), 17 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:43,908 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 97.0) internal successors, (1649), 17 states have internal predecessors, (1649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:43,908 INFO L175 Difference]: Start difference. First operand has 204 places, 506 transitions, 12168 flow. Second operand 16 states and 1157 transitions. [2022-11-18 19:52:43,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1089 transitions, 26705 flow [2022-11-18 19:52:44,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1089 transitions, 25833 flow, removed 18 selfloop flow, removed 6 redundant places. [2022-11-18 19:52:44,783 INFO L231 Difference]: Finished difference. Result has 224 places, 680 transitions, 16157 flow [2022-11-18 19:52:44,783 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=11693, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=16157, PETRI_PLACES=224, PETRI_TRANSITIONS=680} [2022-11-18 19:52:44,784 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 138 predicate places. [2022-11-18 19:52:44,784 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 680 transitions, 16157 flow [2022-11-18 19:52:44,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.125) internal successors, (1090), 16 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:44,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:44,785 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:44,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 19:52:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:44,995 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash -194314738, now seen corresponding path program 11 times [2022-11-18 19:52:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:44,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192230413] [2022-11-18 19:52:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:45,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:45,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:45,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192230413] [2022-11-18 19:52:45,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192230413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:45,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:45,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550456790] [2022-11-18 19:52:45,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:45,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:45,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:45,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:45,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:45,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:45,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 680 transitions, 16157 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:45,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:45,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:45,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:50,028 INFO L130 PetriNetUnfolder]: 6815/16421 cut-off events. [2022-11-18 19:52:50,028 INFO L131 PetriNetUnfolder]: For 288300/288915 co-relation queries the response was YES. [2022-11-18 19:52:50,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109655 conditions, 16421 events. 6815/16421 cut-off events. For 288300/288915 co-relation queries the response was YES. Maximal size of possible extension queue 1268. Compared 177154 event pairs, 1790 based on Foata normal form. 124/16138 useless extension candidates. Maximal degree in co-relation 109583. Up to 10410 conditions per place. [2022-11-18 19:52:50,508 INFO L137 encePairwiseOnDemand]: 88/97 looper letters, 537 selfloop transitions, 65 changer transitions 7/707 dead transitions. [2022-11-18 19:52:50,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 707 transitions, 17703 flow [2022-11-18 19:52:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 471 transitions. [2022-11-18 19:52:50,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8092783505154639 [2022-11-18 19:52:50,510 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 471 transitions. [2022-11-18 19:52:50,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 471 transitions. [2022-11-18 19:52:50,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:50,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 471 transitions. [2022-11-18 19:52:50,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.5) internal successors, (471), 6 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:50,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:50,514 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:50,514 INFO L175 Difference]: Start difference. First operand has 224 places, 680 transitions, 16157 flow. Second operand 6 states and 471 transitions. [2022-11-18 19:52:50,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 707 transitions, 17703 flow [2022-11-18 19:52:51,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 707 transitions, 17589 flow, removed 54 selfloop flow, removed 4 redundant places. [2022-11-18 19:52:51,493 INFO L231 Difference]: Finished difference. Result has 225 places, 683 transitions, 16264 flow [2022-11-18 19:52:51,494 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=16014, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16264, PETRI_PLACES=225, PETRI_TRANSITIONS=683} [2022-11-18 19:52:51,494 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 139 predicate places. [2022-11-18 19:52:51,494 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 683 transitions, 16264 flow [2022-11-18 19:52:51,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:51,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:51,495 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:52:51,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 19:52:51,495 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:51,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash -243818344, now seen corresponding path program 12 times [2022-11-18 19:52:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:51,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371271959] [2022-11-18 19:52:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:51,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371271959] [2022-11-18 19:52:51,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371271959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:52:51,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:52:51,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:52:51,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535709110] [2022-11-18 19:52:51,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:52:51,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:52:51,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:52:51,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:52:51,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:52:51,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 97 [2022-11-18 19:52:51,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 683 transitions, 16264 flow. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:51,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:52:51,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 97 [2022-11-18 19:52:51,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:52:56,941 INFO L130 PetriNetUnfolder]: 6975/16707 cut-off events. [2022-11-18 19:52:56,941 INFO L131 PetriNetUnfolder]: For 301524/302099 co-relation queries the response was YES. [2022-11-18 19:52:57,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113768 conditions, 16707 events. 6975/16707 cut-off events. For 301524/302099 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 180458 event pairs, 1487 based on Foata normal form. 124/16470 useless extension candidates. Maximal degree in co-relation 113695. Up to 10381 conditions per place. [2022-11-18 19:52:57,162 INFO L137 encePairwiseOnDemand]: 89/97 looper letters, 598 selfloop transitions, 77 changer transitions 10/783 dead transitions. [2022-11-18 19:52:57,162 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 783 transitions, 19782 flow [2022-11-18 19:52:57,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 19:52:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 19:52:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 482 transitions. [2022-11-18 19:52:57,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8281786941580757 [2022-11-18 19:52:57,165 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 482 transitions. [2022-11-18 19:52:57,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 482 transitions. [2022-11-18 19:52:57,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:52:57,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 482 transitions. [2022-11-18 19:52:57,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 80.33333333333333) internal successors, (482), 6 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:57,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:57,168 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:57,168 INFO L175 Difference]: Start difference. First operand has 225 places, 683 transitions, 16264 flow. Second operand 6 states and 482 transitions. [2022-11-18 19:52:57,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 783 transitions, 19782 flow [2022-11-18 19:52:58,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 783 transitions, 19414 flow, removed 34 selfloop flow, removed 8 redundant places. [2022-11-18 19:52:58,532 INFO L231 Difference]: Finished difference. Result has 223 places, 682 transitions, 16060 flow [2022-11-18 19:52:58,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=15574, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16060, PETRI_PLACES=223, PETRI_TRANSITIONS=682} [2022-11-18 19:52:58,533 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 137 predicate places. [2022-11-18 19:52:58,533 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 682 transitions, 16060 flow [2022-11-18 19:52:58,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 5 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:52:58,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:52:58,534 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] [2022-11-18 19:52:58,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-18 19:52:58,534 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:52:58,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:52:58,535 INFO L85 PathProgramCache]: Analyzing trace with hash -594276660, now seen corresponding path program 1 times [2022-11-18 19:52:58,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:52:58,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401679102] [2022-11-18 19:52:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:58,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:52:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:58,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:52:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401679102] [2022-11-18 19:52:58,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401679102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:52:58,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079551696] [2022-11-18 19:52:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:52:58,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:52:58,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:52:58,946 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:52:58,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:52:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:52:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:52:59,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:52:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:52:59,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:00,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079551696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:00,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:53:00,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-11-18 19:53:00,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987628523] [2022-11-18 19:53:00,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:00,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 19:53:00,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:00,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 19:53:00,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-11-18 19:53:00,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 97 [2022-11-18 19:53:00,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 682 transitions, 16060 flow. Second operand has 18 states, 18 states have (on average 65.77777777777777) internal successors, (1184), 18 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:00,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:00,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 97 [2022-11-18 19:53:00,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:07,554 INFO L130 PetriNetUnfolder]: 8141/21283 cut-off events. [2022-11-18 19:53:07,555 INFO L131 PetriNetUnfolder]: For 391606/392113 co-relation queries the response was YES. [2022-11-18 19:53:07,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143945 conditions, 21283 events. 8141/21283 cut-off events. For 391606/392113 co-relation queries the response was YES. Maximal size of possible extension queue 1627. Compared 248388 event pairs, 603 based on Foata normal form. 121/21066 useless extension candidates. Maximal degree in co-relation 143873. Up to 8019 conditions per place. [2022-11-18 19:53:07,861 INFO L137 encePairwiseOnDemand]: 80/97 looper letters, 843 selfloop transitions, 410 changer transitions 8/1334 dead transitions. [2022-11-18 19:53:07,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 1334 transitions, 33342 flow [2022-11-18 19:53:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:53:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 19:53:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1310 transitions. [2022-11-18 19:53:07,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7107976125881714 [2022-11-18 19:53:07,865 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1310 transitions. [2022-11-18 19:53:07,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1310 transitions. [2022-11-18 19:53:07,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:07,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1310 transitions. [2022-11-18 19:53:07,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 68.94736842105263) internal successors, (1310), 19 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:07,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 97.0) internal successors, (1940), 20 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:07,874 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 97.0) internal successors, (1940), 20 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:07,874 INFO L175 Difference]: Start difference. First operand has 223 places, 682 transitions, 16060 flow. Second operand 19 states and 1310 transitions. [2022-11-18 19:53:07,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 1334 transitions, 33342 flow [2022-11-18 19:53:09,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1334 transitions, 33022 flow, removed 34 selfloop flow, removed 11 redundant places. [2022-11-18 19:53:09,726 INFO L231 Difference]: Finished difference. Result has 231 places, 876 transitions, 20892 flow [2022-11-18 19:53:09,726 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=97, PETRI_DIFFERENCE_MINUEND_FLOW=15772, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20892, PETRI_PLACES=231, PETRI_TRANSITIONS=876} [2022-11-18 19:53:09,727 INFO L288 CegarLoopForPetriNet]: 86 programPoint places, 145 predicate places. [2022-11-18 19:53:09,727 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 876 transitions, 20892 flow [2022-11-18 19:53:09,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 65.77777777777777) internal successors, (1184), 18 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:09,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:53:09,728 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] [2022-11-18 19:53:09,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 19:53:09,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:09,933 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 19:53:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:53:09,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2077397142, now seen corresponding path program 2 times [2022-11-18 19:53:09,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:53:09,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099264373] [2022-11-18 19:53:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:53:09,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:53:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:53:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:10,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:53:10,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099264373] [2022-11-18 19:53:10,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099264373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:53:10,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392057114] [2022-11-18 19:53:10,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:53:10,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:53:10,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:53:10,387 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:53:10,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e726cc03-7b2b-4572-8144-716779acfe65/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:53:10,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:53:10,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:53:10,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 19:53:10,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:53:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:10,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:53:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:53:11,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392057114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:53:11,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:53:11,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-11-18 19:53:11,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406904808] [2022-11-18 19:53:11,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:53:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 19:53:11,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:53:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 19:53:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-18 19:53:11,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 97 [2022-11-18 19:53:11,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 876 transitions, 20892 flow. Second operand has 17 states, 17 states have (on average 67.29411764705883) internal successors, (1144), 17 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:11,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:53:11,417 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 97 [2022-11-18 19:53:11,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:53:18,858 INFO L130 PetriNetUnfolder]: 8292/22468 cut-off events. [2022-11-18 19:53:18,859 INFO L131 PetriNetUnfolder]: For 455605/457033 co-relation queries the response was YES. [2022-11-18 19:53:19,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157719 conditions, 22468 events. 8292/22468 cut-off events. For 455605/457033 co-relation queries the response was YES. Maximal size of possible extension queue 1812. Compared 269038 event pairs, 882 based on Foata normal form. 499/22495 useless extension candidates. Maximal degree in co-relation 157649. Up to 9126 conditions per place. [2022-11-18 19:53:19,172 INFO L137 encePairwiseOnDemand]: 82/97 looper letters, 708 selfloop transitions, 488 changer transitions 10/1322 dead transitions. [2022-11-18 19:53:19,173 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 1322 transitions, 34994 flow [2022-11-18 19:53:19,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 19:53:19,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-18 19:53:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1315 transitions. [2022-11-18 19:53:19,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7135105805751493 [2022-11-18 19:53:19,177 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1315 transitions. [2022-11-18 19:53:19,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1315 transitions. [2022-11-18 19:53:19,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:53:19,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1315 transitions. [2022-11-18 19:53:19,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 69.21052631578948) internal successors, (1315), 19 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:19,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 97.0) internal successors, (1940), 20 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:19,185 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 97.0) internal successors, (1940), 20 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:53:19,185 INFO L175 Difference]: Start difference. First operand has 231 places, 876 transitions, 20892 flow. Second operand 19 states and 1315 transitions. [2022-11-18 19:53:19,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 1322 transitions, 34994 flow