./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:53:54,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:53:54,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:53:54,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:53:54,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:53:54,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:53:54,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:53:54,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:53:54,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:53:54,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:53:54,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:53:54,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:53:54,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:53:54,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:53:54,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:53:54,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:53:54,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:53:54,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:53:54,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:53:54,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:53:54,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:53:54,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:53:54,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:53:54,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:53:54,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:53:54,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:53:54,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:53:54,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:53:54,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:53:54,733 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:53:54,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:53:54,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:53:54,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:53:54,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:53:54,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:53:54,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:53:54,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:53:54,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:53:54,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:53:54,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:53:54,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:53:54,744 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:53:54,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:53:54,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:53:54,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:53:54,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:53:54,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:53:54,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:53:54,800 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:53:54,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:53:54,800 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:53:54,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:53:54,801 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:53:54,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:53:54,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:53:54,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:53:54,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:53:54,803 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:53:54,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:53:54,803 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:53:54,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:53:54,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:53:54,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:53:54,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:53:54,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:53:54,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:53:54,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:53:54,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:53:54,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:53:54,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:53:54,806 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:53:54,807 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:53:54,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:53:54,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:53:54,808 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_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2021-11-02 22:53:55,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:53:55,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:53:55,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:53:55,174 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:53:55,174 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:53:55,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2021-11-02 22:53:55,259 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/data/ca3c24348/3736056fed0142eaab0ab80e43e069ef/FLAG83bfa2ba9 [2021-11-02 22:53:55,824 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:53:55,825 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2021-11-02 22:53:55,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/data/ca3c24348/3736056fed0142eaab0ab80e43e069ef/FLAG83bfa2ba9 [2021-11-02 22:53:56,161 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/data/ca3c24348/3736056fed0142eaab0ab80e43e069ef [2021-11-02 22:53:56,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:53:56,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:53:56,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:53:56,172 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:53:56,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:53:56,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ef463b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56, skipping insertion in model container [2021-11-02 22:53:56,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:53:56,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:53:56,409 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2021-11-02 22:53:56,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:53:56,425 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:53:56,451 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2021-11-02 22:53:56,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:53:56,470 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:53:56,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56 WrapperNode [2021-11-02 22:53:56,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:53:56,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:53:56,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:53:56,472 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:53:56,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:53:56,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:53:56,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:53:56,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:53:56,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:53:56,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:53:56,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:53:56,559 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:53:56,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (1/1) ... [2021-11-02 22:53:56,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:53:56,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:53:56,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:53:56,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:53:56,676 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-02 22:53:56,676 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-02 22:53:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-02 22:53:56,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-02 22:53:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:53:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:53:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:53:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-02 22:53:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-02 22:53:56,677 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:53:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:53:56,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:53:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:53:56,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:53:56,680 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-02 22:53:57,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:53:57,510 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2021-11-02 22:53:57,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:53:57 BoogieIcfgContainer [2021-11-02 22:53:57,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:53:57,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:53:57,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:53:57,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:53:57,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:53:56" (1/3) ... [2021-11-02 22:53:57,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8444b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:53:57, skipping insertion in model container [2021-11-02 22:53:57,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:53:56" (2/3) ... [2021-11-02 22:53:57,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f8444b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:53:57, skipping insertion in model container [2021-11-02 22:53:57,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:53:57" (3/3) ... [2021-11-02 22:53:57,525 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2021-11-02 22:53:57,530 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-02 22:53:57,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:53:57,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:53:57,530 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-02 22:53:57,560 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,560 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,561 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,561 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,562 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,562 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,563 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,563 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,564 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,564 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,565 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,566 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,566 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,567 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,567 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,568 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,568 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,569 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,569 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,569 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,570 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,571 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,571 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,574 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,574 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,575 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,577 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,578 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,579 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,579 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-02 22:53:57,590 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-02 22:53:57,659 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:53:57,671 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:53:57,673 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-02 22:53:57,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 160 transitions, 336 flow [2021-11-02 22:53:57,820 INFO L129 PetriNetUnfolder]: 13/158 cut-off events. [2021-11-02 22:53:57,820 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-02 22:53:57,824 INFO L84 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 158 events. 13/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2021-11-02 22:53:57,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 160 transitions, 336 flow [2021-11-02 22:53:57,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 150 transitions, 312 flow [2021-11-02 22:53:57,861 INFO L129 PetriNetUnfolder]: 13/149 cut-off events. [2021-11-02 22:53:57,862 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-02 22:53:57,862 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:53:57,863 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:53:57,863 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:53:57,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:53:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1275624224, now seen corresponding path program 1 times [2021-11-02 22:53:57,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:53:57,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704116400] [2021-11-02 22:53:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:53:57,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:53:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:53:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:53:58,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:53:58,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704116400] [2021-11-02 22:53:58,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704116400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:53:58,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:53:58,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:53:58,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684416597] [2021-11-02 22:53:58,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:53:58,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:53:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:53:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:53:58,180 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 160 [2021-11-02 22:53:58,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 150 transitions, 312 flow. Second operand has 2 states, 2 states have (on average 151.5) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:53:58,188 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 160 [2021-11-02 22:53:58,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:53:58,246 INFO L129 PetriNetUnfolder]: 4/141 cut-off events. [2021-11-02 22:53:58,255 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-11-02 22:53:58,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 141 events. 4/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 9/141 useless extension candidates. Maximal degree in co-relation 147. Up to 2 conditions per place. [2021-11-02 22:53:58,260 INFO L132 encePairwiseOnDemand]: 151/160 looper letters, 0 selfloop transitions, 0 changer transitions 5/141 dead transitions. [2021-11-02 22:53:58,260 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 141 transitions, 294 flow [2021-11-02 22:53:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:53:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-02 22:53:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 309 transitions. [2021-11-02 22:53:58,280 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.965625 [2021-11-02 22:53:58,282 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 309 transitions. [2021-11-02 22:53:58,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 309 transitions. [2021-11-02 22:53:58,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:53:58,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 309 transitions. [2021-11-02 22:53:58,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,305 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,307 INFO L186 Difference]: Start difference. First operand has 144 places, 150 transitions, 312 flow. Second operand 2 states and 309 transitions. [2021-11-02 22:53:58,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 141 transitions, 294 flow [2021-11-02 22:53:58,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 141 transitions, 286 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-11-02 22:53:58,320 INFO L242 Difference]: Finished difference. Result has 141 places, 136 transitions, 276 flow [2021-11-02 22:53:58,322 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=276, PETRI_PLACES=141, PETRI_TRANSITIONS=136} [2021-11-02 22:53:58,323 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, -3 predicate places. [2021-11-02 22:53:58,324 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 136 transitions, 276 flow [2021-11-02 22:53:58,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 151.5) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,325 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:53:58,326 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:53:58,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:53:58,327 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:53:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:53:58,328 INFO L85 PathProgramCache]: Analyzing trace with hash 229149989, now seen corresponding path program 1 times [2021-11-02 22:53:58,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:53:58,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998457256] [2021-11-02 22:53:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:53:58,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:53:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:53:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:53:58,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:53:58,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998457256] [2021-11-02 22:53:58,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998457256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:53:58,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:53:58,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:53:58,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493621831] [2021-11-02 22:53:58,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:53:58,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:53:58,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:53:58,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:53:58,743 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 160 [2021-11-02 22:53:58,745 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 136 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,745 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:53:58,745 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 160 [2021-11-02 22:53:58,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:53:58,929 INFO L129 PetriNetUnfolder]: 91/352 cut-off events. [2021-11-02 22:53:58,930 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-02 22:53:58,931 INFO L84 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 352 events. 91/352 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1199 event pairs, 39 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 553. Up to 105 conditions per place. [2021-11-02 22:53:58,934 INFO L132 encePairwiseOnDemand]: 153/160 looper letters, 51 selfloop transitions, 5 changer transitions 3/161 dead transitions. [2021-11-02 22:53:58,935 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 161 transitions, 444 flow [2021-11-02 22:53:58,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:53:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-02 22:53:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 726 transitions. [2021-11-02 22:53:58,939 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.75625 [2021-11-02 22:53:58,940 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 726 transitions. [2021-11-02 22:53:58,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 726 transitions. [2021-11-02 22:53:58,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:53:58,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 726 transitions. [2021-11-02 22:53:58,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,950 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,950 INFO L186 Difference]: Start difference. First operand has 141 places, 136 transitions, 276 flow. Second operand 6 states and 726 transitions. [2021-11-02 22:53:58,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 161 transitions, 444 flow [2021-11-02 22:53:58,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 161 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-02 22:53:58,958 INFO L242 Difference]: Finished difference. Result has 144 places, 139 transitions, 305 flow [2021-11-02 22:53:58,958 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=144, PETRI_TRANSITIONS=139} [2021-11-02 22:53:58,959 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 0 predicate places. [2021-11-02 22:53:58,959 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 139 transitions, 305 flow [2021-11-02 22:53:58,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 115.0) internal successors, (690), 6 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:58,961 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:53:58,961 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:53:58,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:53:58,961 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:53:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:53:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1909569313, now seen corresponding path program 1 times [2021-11-02 22:53:58,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:53:58,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614800265] [2021-11-02 22:53:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:53:58,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:53:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:53:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:53:59,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:53:59,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614800265] [2021-11-02 22:53:59,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614800265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:53:59,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:53:59,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:53:59,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510445931] [2021-11-02 22:53:59,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:53:59,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:53:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:53:59,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:53:59,161 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 160 [2021-11-02 22:53:59,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 139 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:53:59,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 160 [2021-11-02 22:53:59,164 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:53:59,346 INFO L129 PetriNetUnfolder]: 93/381 cut-off events. [2021-11-02 22:53:59,347 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-11-02 22:53:59,350 INFO L84 FinitePrefix]: Finished finitePrefix Result has 646 conditions, 381 events. 93/381 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1302 event pairs, 13 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 639. Up to 86 conditions per place. [2021-11-02 22:53:59,353 INFO L132 encePairwiseOnDemand]: 152/160 looper letters, 40 selfloop transitions, 8 changer transitions 0/167 dead transitions. [2021-11-02 22:53:59,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 167 transitions, 467 flow [2021-11-02 22:53:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:53:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-02 22:53:59,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 849 transitions. [2021-11-02 22:53:59,361 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.884375 [2021-11-02 22:53:59,361 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 849 transitions. [2021-11-02 22:53:59,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 849 transitions. [2021-11-02 22:53:59,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:53:59,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 849 transitions. [2021-11-02 22:53:59,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,376 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,377 INFO L186 Difference]: Start difference. First operand has 144 places, 139 transitions, 305 flow. Second operand 6 states and 849 transitions. [2021-11-02 22:53:59,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 167 transitions, 467 flow [2021-11-02 22:53:59,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 167 transitions, 463 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-11-02 22:53:59,385 INFO L242 Difference]: Finished difference. Result has 148 places, 142 transitions, 346 flow [2021-11-02 22:53:59,386 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=148, PETRI_TRANSITIONS=142} [2021-11-02 22:53:59,386 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 4 predicate places. [2021-11-02 22:53:59,387 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 142 transitions, 346 flow [2021-11-02 22:53:59,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,388 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:53:59,388 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:53:59,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:53:59,388 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:53:59,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:53:59,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1455657459, now seen corresponding path program 2 times [2021-11-02 22:53:59,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:53:59,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291553788] [2021-11-02 22:53:59,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:53:59,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:53:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:53:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:53:59,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:53:59,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291553788] [2021-11-02 22:53:59,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291553788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:53:59,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:53:59,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:53:59,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692755450] [2021-11-02 22:53:59,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:53:59,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:53:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:53:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:53:59,589 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 160 [2021-11-02 22:53:59,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 142 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:53:59,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 160 [2021-11-02 22:53:59,591 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:53:59,708 INFO L129 PetriNetUnfolder]: 91/364 cut-off events. [2021-11-02 22:53:59,709 INFO L130 PetriNetUnfolder]: For 163/203 co-relation queries the response was YES. [2021-11-02 22:53:59,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 364 events. 91/364 cut-off events. For 163/203 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1189 event pairs, 37 based on Foata normal form. 5/363 useless extension candidates. Maximal degree in co-relation 719. Up to 119 conditions per place. [2021-11-02 22:53:59,716 INFO L132 encePairwiseOnDemand]: 150/160 looper letters, 30 selfloop transitions, 7 changer transitions 4/160 dead transitions. [2021-11-02 22:53:59,716 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 160 transitions, 496 flow [2021-11-02 22:53:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:53:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-02 22:53:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 705 transitions. [2021-11-02 22:53:59,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.88125 [2021-11-02 22:53:59,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 705 transitions. [2021-11-02 22:53:59,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 705 transitions. [2021-11-02 22:53:59,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:53:59,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 705 transitions. [2021-11-02 22:53:59,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,727 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 160.0) internal successors, (960), 6 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,727 INFO L186 Difference]: Start difference. First operand has 148 places, 142 transitions, 346 flow. Second operand 5 states and 705 transitions. [2021-11-02 22:53:59,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 160 transitions, 496 flow [2021-11-02 22:53:59,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 160 transitions, 484 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-11-02 22:53:59,736 INFO L242 Difference]: Finished difference. Result has 151 places, 142 transitions, 363 flow [2021-11-02 22:53:59,736 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=151, PETRI_TRANSITIONS=142} [2021-11-02 22:53:59,737 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 7 predicate places. [2021-11-02 22:53:59,737 INFO L470 AbstractCegarLoop]: Abstraction has has 151 places, 142 transitions, 363 flow [2021-11-02 22:53:59,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,738 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:53:59,738 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:53:59,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:53:59,739 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:53:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:53:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2073602375, now seen corresponding path program 1 times [2021-11-02 22:53:59,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:53:59,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111436514] [2021-11-02 22:53:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:53:59,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:53:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:53:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:53:59,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:53:59,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111436514] [2021-11-02 22:53:59,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111436514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:53:59,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:53:59,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:53:59,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791182878] [2021-11-02 22:53:59,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:53:59,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:53:59,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:53:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:53:59,903 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 160 [2021-11-02 22:53:59,906 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 142 transitions, 363 flow. Second operand has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:53:59,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:53:59,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 160 [2021-11-02 22:53:59,907 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:54:00,024 INFO L129 PetriNetUnfolder]: 84/316 cut-off events. [2021-11-02 22:54:00,025 INFO L130 PetriNetUnfolder]: For 200/225 co-relation queries the response was YES. [2021-11-02 22:54:00,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 316 events. 84/316 cut-off events. For 200/225 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 861 event pairs, 42 based on Foata normal form. 12/323 useless extension candidates. Maximal degree in co-relation 657. Up to 119 conditions per place. [2021-11-02 22:54:00,028 INFO L132 encePairwiseOnDemand]: 153/160 looper letters, 28 selfloop transitions, 7 changer transitions 0/154 dead transitions. [2021-11-02 22:54:00,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 475 flow [2021-11-02 22:54:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:54:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-02 22:54:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 833 transitions. [2021-11-02 22:54:00,032 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8677083333333333 [2021-11-02 22:54:00,033 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 833 transitions. [2021-11-02 22:54:00,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 833 transitions. [2021-11-02 22:54:00,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:54:00,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 833 transitions. [2021-11-02 22:54:00,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.83333333333334) internal successors, (833), 6 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,042 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,042 INFO L186 Difference]: Start difference. First operand has 151 places, 142 transitions, 363 flow. Second operand 6 states and 833 transitions. [2021-11-02 22:54:00,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 475 flow [2021-11-02 22:54:00,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 154 transitions, 449 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-02 22:54:00,052 INFO L242 Difference]: Finished difference. Result has 152 places, 142 transitions, 357 flow [2021-11-02 22:54:00,053 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=152, PETRI_TRANSITIONS=142} [2021-11-02 22:54:00,053 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 8 predicate places. [2021-11-02 22:54:00,053 INFO L470 AbstractCegarLoop]: Abstraction has has 152 places, 142 transitions, 357 flow [2021-11-02 22:54:00,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,054 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:54:00,055 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:00,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:54:00,055 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:54:00,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:00,057 INFO L85 PathProgramCache]: Analyzing trace with hash -533246075, now seen corresponding path program 1 times [2021-11-02 22:54:00,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:00,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844803684] [2021-11-02 22:54:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:00,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:54:00,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:00,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844803684] [2021-11-02 22:54:00,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844803684] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:00,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:00,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:54:00,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041587694] [2021-11-02 22:54:00,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:54:00,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:00,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:54:00,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:00,189 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 160 [2021-11-02 22:54:00,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 142 transitions, 357 flow. Second operand has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,191 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:54:00,191 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 160 [2021-11-02 22:54:00,191 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:54:00,334 INFO L129 PetriNetUnfolder]: 21/266 cut-off events. [2021-11-02 22:54:00,335 INFO L130 PetriNetUnfolder]: For 60/63 co-relation queries the response was YES. [2021-11-02 22:54:00,336 INFO L84 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 266 events. 21/266 cut-off events. For 60/63 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 526 event pairs, 4 based on Foata normal form. 4/262 useless extension candidates. Maximal degree in co-relation 418. Up to 29 conditions per place. [2021-11-02 22:54:00,337 INFO L132 encePairwiseOnDemand]: 149/160 looper letters, 26 selfloop transitions, 8 changer transitions 13/159 dead transitions. [2021-11-02 22:54:00,337 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 159 transitions, 485 flow [2021-11-02 22:54:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:54:00,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-02 22:54:00,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1145 transitions. [2021-11-02 22:54:00,343 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7951388888888888 [2021-11-02 22:54:00,343 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1145 transitions. [2021-11-02 22:54:00,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1145 transitions. [2021-11-02 22:54:00,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:54:00,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1145 transitions. [2021-11-02 22:54:00,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.22222222222223) internal successors, (1145), 9 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 160.0) internal successors, (1600), 10 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,353 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 160.0) internal successors, (1600), 10 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,353 INFO L186 Difference]: Start difference. First operand has 152 places, 142 transitions, 357 flow. Second operand 9 states and 1145 transitions. [2021-11-02 22:54:00,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 159 transitions, 485 flow [2021-11-02 22:54:00,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 159 transitions, 469 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-02 22:54:00,361 INFO L242 Difference]: Finished difference. Result has 157 places, 143 transitions, 371 flow [2021-11-02 22:54:00,361 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=371, PETRI_PLACES=157, PETRI_TRANSITIONS=143} [2021-11-02 22:54:00,361 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 13 predicate places. [2021-11-02 22:54:00,362 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 143 transitions, 371 flow [2021-11-02 22:54:00,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.33333333333333) internal successors, (752), 6 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,362 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:54:00,363 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:00,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:54:00,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:54:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash 202270448, now seen corresponding path program 1 times [2021-11-02 22:54:00,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:00,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818988189] [2021-11-02 22:54:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:00,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:54:00,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:00,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818988189] [2021-11-02 22:54:00,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818988189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:00,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:00,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:54:00,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118192273] [2021-11-02 22:54:00,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:54:00,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:00,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:54:00,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:00,470 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 160 [2021-11-02 22:54:00,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 143 transitions, 371 flow. Second operand has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:54:00,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 160 [2021-11-02 22:54:00,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:54:00,588 INFO L129 PetriNetUnfolder]: 21/255 cut-off events. [2021-11-02 22:54:00,589 INFO L130 PetriNetUnfolder]: For 62/65 co-relation queries the response was YES. [2021-11-02 22:54:00,590 INFO L84 FinitePrefix]: Finished finitePrefix Result has 430 conditions, 255 events. 21/255 cut-off events. For 62/65 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 499 event pairs, 7 based on Foata normal form. 4/251 useless extension candidates. Maximal degree in co-relation 417. Up to 27 conditions per place. [2021-11-02 22:54:00,591 INFO L132 encePairwiseOnDemand]: 151/160 looper letters, 29 selfloop transitions, 6 changer transitions 1/148 dead transitions. [2021-11-02 22:54:00,592 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 148 transitions, 453 flow [2021-11-02 22:54:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:54:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-11-02 22:54:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 889 transitions. [2021-11-02 22:54:00,596 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.79375 [2021-11-02 22:54:00,596 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 889 transitions. [2021-11-02 22:54:00,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 889 transitions. [2021-11-02 22:54:00,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:54:00,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 889 transitions. [2021-11-02 22:54:00,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.0) internal successors, (889), 7 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,604 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 160.0) internal successors, (1280), 8 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,604 INFO L186 Difference]: Start difference. First operand has 157 places, 143 transitions, 371 flow. Second operand 7 states and 889 transitions. [2021-11-02 22:54:00,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 148 transitions, 453 flow [2021-11-02 22:54:00,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 148 transitions, 439 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-11-02 22:54:00,610 INFO L242 Difference]: Finished difference. Result has 158 places, 144 transitions, 381 flow [2021-11-02 22:54:00,611 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=381, PETRI_PLACES=158, PETRI_TRANSITIONS=144} [2021-11-02 22:54:00,611 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, 14 predicate places. [2021-11-02 22:54:00,611 INFO L470 AbstractCegarLoop]: Abstraction has has 158 places, 144 transitions, 381 flow [2021-11-02 22:54:00,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,612 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-02 22:54:00,612 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:00,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:54:00,613 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-02 22:54:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:00,614 INFO L85 PathProgramCache]: Analyzing trace with hash -633894010, now seen corresponding path program 1 times [2021-11-02 22:54:00,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:00,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269554210] [2021-11-02 22:54:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:00,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:54:00,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:00,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269554210] [2021-11-02 22:54:00,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269554210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:00,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:00,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:54:00,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506444652] [2021-11-02 22:54:00,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:54:00,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:54:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:00,780 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 160 [2021-11-02 22:54:00,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 144 transitions, 381 flow. Second operand has 6 states, 6 states have (on average 113.33333333333333) internal successors, (680), 6 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-02 22:54:00,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 160 [2021-11-02 22:54:00,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-02 22:54:00,811 INFO L129 PetriNetUnfolder]: 0/55 cut-off events. [2021-11-02 22:54:00,811 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-02 22:54:00,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 55 events. 0/55 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 0 event pairs, 0 based on Foata normal form. 1/56 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2021-11-02 22:54:00,812 INFO L132 encePairwiseOnDemand]: 155/160 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2021-11-02 22:54:00,812 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 55 transitions, 151 flow [2021-11-02 22:54:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:54:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-02 22:54:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 655 transitions. [2021-11-02 22:54:00,815 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6822916666666666 [2021-11-02 22:54:00,815 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 655 transitions. [2021-11-02 22:54:00,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 655 transitions. [2021-11-02 22:54:00,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:54:00,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 655 transitions. [2021-11-02 22:54:00,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.16666666666667) internal successors, (655), 6 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,822 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,823 INFO L186 Difference]: Start difference. First operand has 158 places, 144 transitions, 381 flow. Second operand 6 states and 655 transitions. [2021-11-02 22:54:00,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 55 transitions, 151 flow [2021-11-02 22:54:00,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 55 transitions, 136 flow, removed 0 selfloop flow, removed 9 redundant places. [2021-11-02 22:54:00,824 INFO L242 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2021-11-02 22:54:00,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=160, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2021-11-02 22:54:00,825 INFO L334 CegarLoopForPetriNet]: 144 programPoint places, -76 predicate places. [2021-11-02 22:54:00,825 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2021-11-02 22:54:00,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 113.33333333333333) internal successors, (680), 6 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:00,828 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-02 22:54:00,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-11-02 22:54:00,829 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-11-02 22:54:00,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:54:00,832 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:00,836 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-02 22:54:00,836 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:54:00,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:54:00 BasicIcfg [2021-11-02 22:54:00,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:54:00,840 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:54:00,840 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:54:00,840 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:54:00,840 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:53:57" (3/4) ... [2021-11-02 22:54:00,843 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-02 22:54:00,848 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-11-02 22:54:00,848 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-11-02 22:54:00,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2021-11-02 22:54:00,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-02 22:54:00,856 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-02 22:54:00,857 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-02 22:54:00,927 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/witness.graphml [2021-11-02 22:54:00,928 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:54:00,930 INFO L168 Benchmark]: Toolchain (without parser) took 4764.46 ms. Allocated memory was 119.5 MB in the beginning and 165.7 MB in the end (delta: 46.1 MB). Free memory was 80.3 MB in the beginning and 120.3 MB in the end (delta: -40.0 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:00,930 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 119.5 MB. Free memory was 96.8 MB in the beginning and 96.7 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:54:00,931 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.37 ms. Allocated memory is still 119.5 MB. Free memory was 80.1 MB in the beginning and 93.5 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:00,932 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.47 ms. Allocated memory is still 119.5 MB. Free memory was 93.5 MB in the beginning and 91.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:00,932 INFO L168 Benchmark]: Boogie Preprocessor took 31.81 ms. Allocated memory is still 119.5 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:00,932 INFO L168 Benchmark]: RCFGBuilder took 953.66 ms. Allocated memory is still 119.5 MB. Free memory was 89.6 MB in the beginning and 64.5 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:00,933 INFO L168 Benchmark]: TraceAbstraction took 3322.66 ms. Allocated memory was 119.5 MB in the beginning and 165.7 MB in the end (delta: 46.1 MB). Free memory was 63.8 MB in the beginning and 124.5 MB in the end (delta: -60.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:54:00,933 INFO L168 Benchmark]: Witness Printer took 88.66 ms. Allocated memory is still 165.7 MB. Free memory was 124.5 MB in the beginning and 120.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:00,936 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 119.5 MB. Free memory was 96.8 MB in the beginning and 96.7 MB in the end (delta: 60.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 299.37 ms. Allocated memory is still 119.5 MB. Free memory was 80.1 MB in the beginning and 93.5 MB in the end (delta: -13.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.47 ms. Allocated memory is still 119.5 MB. Free memory was 93.5 MB in the beginning and 91.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.81 ms. Allocated memory is still 119.5 MB. Free memory was 91.4 MB in the beginning and 90.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 953.66 ms. Allocated memory is still 119.5 MB. Free memory was 89.6 MB in the beginning and 64.5 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3322.66 ms. Allocated memory was 119.5 MB in the beginning and 165.7 MB in the end (delta: 46.1 MB). Free memory was 63.8 MB in the beginning and 124.5 MB in the end (delta: -60.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 88.66 ms. Allocated memory is still 165.7 MB. Free memory was 124.5 MB in the beginning and 120.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 102]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 168 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.1s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 194 SDslu, 139 SDs, 0 SdLazy, 331 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=381occurred in iteration=7, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 955 NumberOfCodeBlocks, 955 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 947 ConstructedInterpolants, 0 QuantifiedInterpolants, 2888 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 12/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-02 22:54:00,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e5a39b-9878-405d-87d1-7f4beab44cbf/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE