./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:04:38,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:04:38,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:04:38,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:04:38,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:04:38,846 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:04:38,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:04:38,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:04:38,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:04:38,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:04:38,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:04:38,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:04:38,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:04:38,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:04:38,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:04:38,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:04:38,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:04:38,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:04:38,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:04:38,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:04:38,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:04:38,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:04:38,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:04:38,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:04:38,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:04:38,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:04:38,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:04:38,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:04:38,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:04:38,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:04:38,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:04:38,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:04:38,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:04:38,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:04:38,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:04:38,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:04:38,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:04:38,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:04:38,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:04:38,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:04:38,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:04:38,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:04:38,906 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:04:38,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:04:38,907 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:04:38,907 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:04:38,907 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:04:38,908 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:04:38,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:04:38,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:04:38,909 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:04:38,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:04:38,909 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:04:38,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:04:38,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:04:38,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:04:38,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:04:38,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:04:38,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:04:38,911 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:04:38,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:04:38,911 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:04:38,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:04:38,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:04:38,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:04:38,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:04:38,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:04:38,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:04:38,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:04:38,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:04:38,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:04:38,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:04:38,913 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:04:38,914 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:04:38,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:04:38,914 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_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5393d9cf3b7cc0865f031a716dd61208c034931418b29464b30da9c6eaf669bf [2022-11-16 11:04:39,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:04:39,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:04:39,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:04:39,182 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:04:39,183 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:04:39,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-11-16 11:04:39,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/data/7d0525a5e/345b2ec1a758488eaac6a0999a140f65/FLAG847e42abd [2022-11-16 11:04:39,783 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:04:39,783 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/sv-benchmarks/c/weaver/unroll-2.wvr.c [2022-11-16 11:04:39,790 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/data/7d0525a5e/345b2ec1a758488eaac6a0999a140f65/FLAG847e42abd [2022-11-16 11:04:40,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/data/7d0525a5e/345b2ec1a758488eaac6a0999a140f65 [2022-11-16 11:04:40,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:04:40,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:04:40,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:04:40,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:04:40,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:04:40,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7568e211 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40, skipping insertion in model container [2022-11-16 11:04:40,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:04:40,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:04:40,426 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-11-16 11:04:40,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:04:40,442 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:04:40,464 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/sv-benchmarks/c/weaver/unroll-2.wvr.c[2428,2441] [2022-11-16 11:04:40,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:04:40,482 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:04:40,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40 WrapperNode [2022-11-16 11:04:40,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:04:40,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:04:40,484 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:04:40,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:04:40,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,524 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2022-11-16 11:04:40,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:04:40,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:04:40,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:04:40,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:04:40,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:04:40,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:04:40,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:04:40,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:04:40,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (1/1) ... [2022-11-16 11:04:40,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:04:40,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:40,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:04:40,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:04:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:04:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:04:40,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:04:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:04:40,671 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:04:40,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:04:40,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:04:40,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:04:40,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:04:40,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:04:40,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:04:40,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:04:40,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:04:40,677 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:04:40,817 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:04:40,819 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:04:41,173 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:04:41,183 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:04:41,183 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:04:41,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:04:41 BoogieIcfgContainer [2022-11-16 11:04:41,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:04:41,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:04:41,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:04:41,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:04:41,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:04:40" (1/3) ... [2022-11-16 11:04:41,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0868f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:04:41, skipping insertion in model container [2022-11-16 11:04:41,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:04:40" (2/3) ... [2022-11-16 11:04:41,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0868f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:04:41, skipping insertion in model container [2022-11-16 11:04:41,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:04:41" (3/3) ... [2022-11-16 11:04:41,195 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.c [2022-11-16 11:04:41,204 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:04:41,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:04:41,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:04:41,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:04:41,323 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:04:41,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 171 transitions, 358 flow [2022-11-16 11:04:41,505 INFO L130 PetriNetUnfolder]: 14/169 cut-off events. [2022-11-16 11:04:41,505 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:04:41,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 14/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 153 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-11-16 11:04:41,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 171 transitions, 358 flow [2022-11-16 11:04:41,519 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 160 transitions, 332 flow [2022-11-16 11:04:41,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:04:41,537 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3871edbb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:04:41,537 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:04:41,576 INFO L130 PetriNetUnfolder]: 13/155 cut-off events. [2022-11-16 11:04:41,577 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:04:41,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:41,577 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:41,578 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2026578541, now seen corresponding path program 1 times [2022-11-16 11:04:41,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:41,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217881428] [2022-11-16 11:04:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:41,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:41,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:41,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217881428] [2022-11-16 11:04:41,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217881428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:41,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:41,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:04:41,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002896961] [2022-11-16 11:04:41,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:41,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:04:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:41,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:04:41,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:04:41,909 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 171 [2022-11-16 11:04:41,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 160 transitions, 332 flow. Second operand has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:41,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:41,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 171 [2022-11-16 11:04:41,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:41,994 INFO L130 PetriNetUnfolder]: 3/149 cut-off events. [2022-11-16 11:04:41,997 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 11:04:42,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 149 events. 3/149 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 137 event pairs, 0 based on Foata normal form. 14/152 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-11-16 11:04:42,002 INFO L137 encePairwiseOnDemand]: 160/171 looper letters, 4 selfloop transitions, 0 changer transitions 5/149 dead transitions. [2022-11-16 11:04:42,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 149 transitions, 318 flow [2022-11-16 11:04:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:04:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:04:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 325 transitions. [2022-11-16 11:04:42,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9502923976608187 [2022-11-16 11:04:42,026 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 325 transitions. [2022-11-16 11:04:42,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 325 transitions. [2022-11-16 11:04:42,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:42,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 325 transitions. [2022-11-16 11:04:42,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 162.5) internal successors, (325), 2 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,053 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,054 INFO L175 Difference]: Start difference. First operand has 153 places, 160 transitions, 332 flow. Second operand 2 states and 325 transitions. [2022-11-16 11:04:42,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 149 transitions, 318 flow [2022-11-16 11:04:42,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 149 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:04:42,070 INFO L231 Difference]: Finished difference. Result has 150 places, 144 transitions, 292 flow [2022-11-16 11:04:42,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=292, PETRI_PLACES=150, PETRI_TRANSITIONS=144} [2022-11-16 11:04:42,076 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, -3 predicate places. [2022-11-16 11:04:42,076 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 144 transitions, 292 flow [2022-11-16 11:04:42,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:42,078 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:42,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:04:42,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1341325294, now seen corresponding path program 1 times [2022-11-16 11:04:42,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:42,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19766756] [2022-11-16 11:04:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:42,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:42,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19766756] [2022-11-16 11:04:42,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19766756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:42,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:42,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:04:42,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647229168] [2022-11-16 11:04:42,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:42,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:04:42,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:42,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:04:42,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:04:42,710 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 171 [2022-11-16 11:04:42,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 144 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:42,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 171 [2022-11-16 11:04:42,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:42,884 INFO L130 PetriNetUnfolder]: 16/244 cut-off events. [2022-11-16 11:04:42,884 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 11:04:42,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 244 events. 16/244 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 525 event pairs, 5 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 308. Up to 49 conditions per place. [2022-11-16 11:04:42,887 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 36 selfloop transitions, 7 changer transitions 0/148 dead transitions. [2022-11-16 11:04:42,887 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 148 transitions, 386 flow [2022-11-16 11:04:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:04:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:04:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 964 transitions. [2022-11-16 11:04:42,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7046783625730995 [2022-11-16 11:04:42,892 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 964 transitions. [2022-11-16 11:04:42,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 964 transitions. [2022-11-16 11:04:42,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:42,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 964 transitions. [2022-11-16 11:04:42,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.5) internal successors, (964), 8 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,902 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,903 INFO L175 Difference]: Start difference. First operand has 150 places, 144 transitions, 292 flow. Second operand 8 states and 964 transitions. [2022-11-16 11:04:42,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 148 transitions, 386 flow [2022-11-16 11:04:42,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 148 transitions, 386 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:04:42,908 INFO L231 Difference]: Finished difference. Result has 153 places, 145 transitions, 314 flow [2022-11-16 11:04:42,908 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=153, PETRI_TRANSITIONS=145} [2022-11-16 11:04:42,909 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 0 predicate places. [2022-11-16 11:04:42,910 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 145 transitions, 314 flow [2022-11-16 11:04:42,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 119.0) internal successors, (952), 8 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:42,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:42,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:42,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:04:42,912 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1861213256, now seen corresponding path program 1 times [2022-11-16 11:04:42,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:42,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039397085] [2022-11-16 11:04:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:42,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:43,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:43,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039397085] [2022-11-16 11:04:43,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039397085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:43,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:43,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:04:43,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713410237] [2022-11-16 11:04:43,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:04:43,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:04:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:04:43,296 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 171 [2022-11-16 11:04:43,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 145 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:43,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:43,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 171 [2022-11-16 11:04:43,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:43,542 INFO L130 PetriNetUnfolder]: 73/531 cut-off events. [2022-11-16 11:04:43,543 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-16 11:04:43,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 531 events. 73/531 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2552 event pairs, 20 based on Foata normal form. 1/491 useless extension candidates. Maximal degree in co-relation 722. Up to 79 conditions per place. [2022-11-16 11:04:43,549 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 53 selfloop transitions, 5 changer transitions 4/172 dead transitions. [2022-11-16 11:04:43,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 497 flow [2022-11-16 11:04:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:04:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:04:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 777 transitions. [2022-11-16 11:04:43,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7573099415204678 [2022-11-16 11:04:43,552 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 777 transitions. [2022-11-16 11:04:43,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 777 transitions. [2022-11-16 11:04:43,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:43,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 777 transitions. [2022-11-16 11:04:43,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 129.5) internal successors, (777), 6 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:43,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:43,559 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:43,559 INFO L175 Difference]: Start difference. First operand has 153 places, 145 transitions, 314 flow. Second operand 6 states and 777 transitions. [2022-11-16 11:04:43,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 497 flow [2022-11-16 11:04:43,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 172 transitions, 485 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:04:43,566 INFO L231 Difference]: Finished difference. Result has 155 places, 148 transitions, 331 flow [2022-11-16 11:04:43,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=148} [2022-11-16 11:04:43,568 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 2 predicate places. [2022-11-16 11:04:43,569 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 148 transitions, 331 flow [2022-11-16 11:04:43,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:43,569 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:43,570 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:43,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:04:43,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:43,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:43,572 INFO L85 PathProgramCache]: Analyzing trace with hash -141424673, now seen corresponding path program 1 times [2022-11-16 11:04:43,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:43,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389116402] [2022-11-16 11:04:43,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:43,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:43,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:43,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389116402] [2022-11-16 11:04:43,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389116402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:43,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915151131] [2022-11-16 11:04:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:43,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:43,903 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:43,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:04:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:44,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:04:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:44,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:44,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915151131] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:44,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:04:44,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-11-16 11:04:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343877022] [2022-11-16 11:04:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:44,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:04:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:04:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:04:44,390 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 171 [2022-11-16 11:04:44,391 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 148 transitions, 331 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:44,391 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:44,392 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 171 [2022-11-16 11:04:44,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:44,536 INFO L130 PetriNetUnfolder]: 80/582 cut-off events. [2022-11-16 11:04:44,536 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2022-11-16 11:04:44,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 785 conditions, 582 events. 80/582 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2933 event pairs, 13 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 777. Up to 79 conditions per place. [2022-11-16 11:04:44,540 INFO L137 encePairwiseOnDemand]: 166/171 looper letters, 22 selfloop transitions, 5 changer transitions 1/160 dead transitions. [2022-11-16 11:04:44,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 160 transitions, 415 flow [2022-11-16 11:04:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:04:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:04:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2022-11-16 11:04:44,543 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8786549707602339 [2022-11-16 11:04:44,543 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2022-11-16 11:04:44,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2022-11-16 11:04:44,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:44,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2022-11-16 11:04:44,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:44,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:44,553 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:44,553 INFO L175 Difference]: Start difference. First operand has 155 places, 148 transitions, 331 flow. Second operand 4 states and 601 transitions. [2022-11-16 11:04:44,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 160 transitions, 415 flow [2022-11-16 11:04:44,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 160 transitions, 411 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-16 11:04:44,558 INFO L231 Difference]: Finished difference. Result has 157 places, 152 transitions, 363 flow [2022-11-16 11:04:44,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=363, PETRI_PLACES=157, PETRI_TRANSITIONS=152} [2022-11-16 11:04:44,559 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 4 predicate places. [2022-11-16 11:04:44,559 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 152 transitions, 363 flow [2022-11-16 11:04:44,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:44,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:44,560 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:44,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:44,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:44,767 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash 533795701, now seen corresponding path program 2 times [2022-11-16 11:04:44,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:44,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507110184] [2022-11-16 11:04:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:45,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507110184] [2022-11-16 11:04:45,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507110184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:45,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:45,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:04:45,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322342512] [2022-11-16 11:04:45,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:45,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:04:45,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:45,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:04:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:04:45,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-11-16 11:04:45,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 152 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:45,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:45,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-11-16 11:04:45,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:45,255 INFO L130 PetriNetUnfolder]: 131/793 cut-off events. [2022-11-16 11:04:45,255 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2022-11-16 11:04:45,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 793 events. 131/793 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4512 event pairs, 35 based on Foata normal form. 7/753 useless extension candidates. Maximal degree in co-relation 1250. Up to 123 conditions per place. [2022-11-16 11:04:45,261 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 11 changer transitions 5/194 dead transitions. [2022-11-16 11:04:45,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 194 transitions, 641 flow [2022-11-16 11:04:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:04:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:04:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 899 transitions. [2022-11-16 11:04:45,264 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8762183235867447 [2022-11-16 11:04:45,265 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 899 transitions. [2022-11-16 11:04:45,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 899 transitions. [2022-11-16 11:04:45,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:45,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 899 transitions. [2022-11-16 11:04:45,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 149.83333333333334) internal successors, (899), 6 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:45,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:45,271 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:45,271 INFO L175 Difference]: Start difference. First operand has 157 places, 152 transitions, 363 flow. Second operand 6 states and 899 transitions. [2022-11-16 11:04:45,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 194 transitions, 641 flow [2022-11-16 11:04:45,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 194 transitions, 641 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:04:45,276 INFO L231 Difference]: Finished difference. Result has 166 places, 162 transitions, 463 flow [2022-11-16 11:04:45,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=463, PETRI_PLACES=166, PETRI_TRANSITIONS=162} [2022-11-16 11:04:45,278 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 13 predicate places. [2022-11-16 11:04:45,278 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 162 transitions, 463 flow [2022-11-16 11:04:45,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:45,278 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:45,279 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:45,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:04:45,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:45,280 INFO L85 PathProgramCache]: Analyzing trace with hash -271711249, now seen corresponding path program 3 times [2022-11-16 11:04:45,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:45,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108060821] [2022-11-16 11:04:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:45,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:45,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:45,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:45,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108060821] [2022-11-16 11:04:45,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108060821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:45,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335174565] [2022-11-16 11:04:45,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:04:45,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:45,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:45,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:45,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:04:45,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:04:45,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:04:45,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:04:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:45,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:46,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335174565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:46,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:46,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-16 11:04:46,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372471154] [2022-11-16 11:04:46,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:46,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:04:46,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:04:46,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:04:46,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-11-16 11:04:46,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 162 transitions, 463 flow. Second operand has 9 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:46,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-11-16 11:04:46,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:46,385 INFO L130 PetriNetUnfolder]: 148/934 cut-off events. [2022-11-16 11:04:46,385 INFO L131 PetriNetUnfolder]: For 623/623 co-relation queries the response was YES. [2022-11-16 11:04:46,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 934 events. 148/934 cut-off events. For 623/623 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 5375 event pairs, 39 based on Foata normal form. 11/889 useless extension candidates. Maximal degree in co-relation 1723. Up to 146 conditions per place. [2022-11-16 11:04:46,393 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 49 selfloop transitions, 22 changer transitions 6/206 dead transitions. [2022-11-16 11:04:46,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 206 transitions, 826 flow [2022-11-16 11:04:46,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:04:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:04:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1182 transitions. [2022-11-16 11:04:46,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8640350877192983 [2022-11-16 11:04:46,417 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1182 transitions. [2022-11-16 11:04:46,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1182 transitions. [2022-11-16 11:04:46,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:46,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1182 transitions. [2022-11-16 11:04:46,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 147.75) internal successors, (1182), 8 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,425 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,425 INFO L175 Difference]: Start difference. First operand has 166 places, 162 transitions, 463 flow. Second operand 8 states and 1182 transitions. [2022-11-16 11:04:46,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 206 transitions, 826 flow [2022-11-16 11:04:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 206 transitions, 826 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:04:46,439 INFO L231 Difference]: Finished difference. Result has 178 places, 174 transitions, 653 flow [2022-11-16 11:04:46,440 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=653, PETRI_PLACES=178, PETRI_TRANSITIONS=174} [2022-11-16 11:04:46,443 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 25 predicate places. [2022-11-16 11:04:46,443 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 174 transitions, 653 flow [2022-11-16 11:04:46,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 142.66666666666666) internal successors, (1284), 9 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:46,444 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:46,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:04:46,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:04:46,651 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1825184573, now seen corresponding path program 4 times [2022-11-16 11:04:46,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:46,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598075821] [2022-11-16 11:04:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:46,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:46,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:46,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598075821] [2022-11-16 11:04:46,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598075821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:46,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:46,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:04:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968828519] [2022-11-16 11:04:46,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:46,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:04:46,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:04:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:04:46,928 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-11-16 11:04:46,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 174 transitions, 653 flow. Second operand has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:46,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:46,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-11-16 11:04:46,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:47,179 INFO L130 PetriNetUnfolder]: 146/880 cut-off events. [2022-11-16 11:04:47,179 INFO L131 PetriNetUnfolder]: For 1422/1422 co-relation queries the response was YES. [2022-11-16 11:04:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 880 events. 146/880 cut-off events. For 1422/1422 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4894 event pairs, 60 based on Foata normal form. 2/825 useless extension candidates. Maximal degree in co-relation 1913. Up to 193 conditions per place. [2022-11-16 11:04:47,187 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 41 selfloop transitions, 10 changer transitions 9/189 dead transitions. [2022-11-16 11:04:47,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 189 transitions, 856 flow [2022-11-16 11:04:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:04:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:04:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 878 transitions. [2022-11-16 11:04:47,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8557504873294347 [2022-11-16 11:04:47,191 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 878 transitions. [2022-11-16 11:04:47,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 878 transitions. [2022-11-16 11:04:47,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:47,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 878 transitions. [2022-11-16 11:04:47,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.33333333333334) internal successors, (878), 6 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,196 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,197 INFO L175 Difference]: Start difference. First operand has 178 places, 174 transitions, 653 flow. Second operand 6 states and 878 transitions. [2022-11-16 11:04:47,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 189 transitions, 856 flow [2022-11-16 11:04:47,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 189 transitions, 836 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-16 11:04:47,230 INFO L231 Difference]: Finished difference. Result has 186 places, 174 transitions, 669 flow [2022-11-16 11:04:47,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=669, PETRI_PLACES=186, PETRI_TRANSITIONS=174} [2022-11-16 11:04:47,231 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 33 predicate places. [2022-11-16 11:04:47,232 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 174 transitions, 669 flow [2022-11-16 11:04:47,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.8) internal successors, (714), 5 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:47,232 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:47,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:04:47,233 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:47,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1099081666, now seen corresponding path program 1 times [2022-11-16 11:04:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:47,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992268039] [2022-11-16 11:04:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:47,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:47,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:47,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992268039] [2022-11-16 11:04:47,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992268039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:47,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:47,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:04:47,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428988688] [2022-11-16 11:04:47,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:47,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:04:47,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:47,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:04:47,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:04:47,537 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-11-16 11:04:47,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 174 transitions, 669 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:47,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-11-16 11:04:47,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:47,859 INFO L130 PetriNetUnfolder]: 170/1055 cut-off events. [2022-11-16 11:04:47,860 INFO L131 PetriNetUnfolder]: For 1712/1712 co-relation queries the response was YES. [2022-11-16 11:04:47,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264 conditions, 1055 events. 170/1055 cut-off events. For 1712/1712 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6433 event pairs, 44 based on Foata normal form. 6/994 useless extension candidates. Maximal degree in co-relation 2241. Up to 181 conditions per place. [2022-11-16 11:04:47,869 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 49 selfloop transitions, 18 changer transitions 5/201 dead transitions. [2022-11-16 11:04:47,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 201 transitions, 967 flow [2022-11-16 11:04:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:04:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:04:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1034 transitions. [2022-11-16 11:04:47,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8638262322472848 [2022-11-16 11:04:47,872 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1034 transitions. [2022-11-16 11:04:47,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1034 transitions. [2022-11-16 11:04:47,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:47,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1034 transitions. [2022-11-16 11:04:47,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.71428571428572) internal successors, (1034), 7 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,880 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,880 INFO L175 Difference]: Start difference. First operand has 186 places, 174 transitions, 669 flow. Second operand 7 states and 1034 transitions. [2022-11-16 11:04:47,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 201 transitions, 967 flow [2022-11-16 11:04:47,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 201 transitions, 933 flow, removed 6 selfloop flow, removed 5 redundant places. [2022-11-16 11:04:47,891 INFO L231 Difference]: Finished difference. Result has 188 places, 178 transitions, 736 flow [2022-11-16 11:04:47,891 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=188, PETRI_TRANSITIONS=178} [2022-11-16 11:04:47,894 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 35 predicate places. [2022-11-16 11:04:47,895 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 178 transitions, 736 flow [2022-11-16 11:04:47,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:47,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:47,895 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:47,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:04:47,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:47,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1611543498, now seen corresponding path program 2 times [2022-11-16 11:04:47,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:47,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961021823] [2022-11-16 11:04:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:48,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:48,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961021823] [2022-11-16 11:04:48,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961021823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:04:48,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:04:48,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:04:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778670093] [2022-11-16 11:04:48,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:04:48,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:04:48,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:04:48,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:04:48,195 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 171 [2022-11-16 11:04:48,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 178 transitions, 736 flow. Second operand has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:48,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:48,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 171 [2022-11-16 11:04:48,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:04:48,538 INFO L130 PetriNetUnfolder]: 164/1012 cut-off events. [2022-11-16 11:04:48,538 INFO L131 PetriNetUnfolder]: For 1871/1879 co-relation queries the response was YES. [2022-11-16 11:04:48,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2217 conditions, 1012 events. 164/1012 cut-off events. For 1871/1879 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5828 event pairs, 42 based on Foata normal form. 11/959 useless extension candidates. Maximal degree in co-relation 2193. Up to 174 conditions per place. [2022-11-16 11:04:48,550 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 51 selfloop transitions, 19 changer transitions 4/203 dead transitions. [2022-11-16 11:04:48,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 203 transitions, 1024 flow [2022-11-16 11:04:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:04:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 11:04:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 893 transitions. [2022-11-16 11:04:48,555 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8703703703703703 [2022-11-16 11:04:48,555 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 893 transitions. [2022-11-16 11:04:48,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 893 transitions. [2022-11-16 11:04:48,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:04:48,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 893 transitions. [2022-11-16 11:04:48,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 148.83333333333334) internal successors, (893), 6 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:48,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:48,564 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:48,565 INFO L175 Difference]: Start difference. First operand has 188 places, 178 transitions, 736 flow. Second operand 6 states and 893 transitions. [2022-11-16 11:04:48,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 203 transitions, 1024 flow [2022-11-16 11:04:48,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 203 transitions, 978 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-16 11:04:48,579 INFO L231 Difference]: Finished difference. Result has 193 places, 177 transitions, 744 flow [2022-11-16 11:04:48,580 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=677, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=744, PETRI_PLACES=193, PETRI_TRANSITIONS=177} [2022-11-16 11:04:48,581 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 40 predicate places. [2022-11-16 11:04:48,581 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 177 transitions, 744 flow [2022-11-16 11:04:48,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.66666666666666) internal successors, (856), 6 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:48,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:04:48,582 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:04:48,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:04:48,583 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:04:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:04:48,584 INFO L85 PathProgramCache]: Analyzing trace with hash 142774275, now seen corresponding path program 1 times [2022-11-16 11:04:48,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:04:48,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462180260] [2022-11-16 11:04:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:04:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:04:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:04:49,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462180260] [2022-11-16 11:04:49,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462180260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:04:49,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921780769] [2022-11-16 11:04:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:04:49,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:04:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:04:49,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:04:49,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:04:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:04:49,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:04:49,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:04:50,043 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 11:04:50,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2022-11-16 11:04:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:50,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:04:50,661 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 11:04:50,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 11:04:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:04:51,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921780769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:04:51,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:04:51,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 33 [2022-11-16 11:04:51,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201187838] [2022-11-16 11:04:51,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:04:51,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 11:04:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:04:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 11:04:51,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:04:51,787 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 171 [2022-11-16 11:04:51,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 177 transitions, 744 flow. Second operand has 33 states, 33 states have (on average 83.84848484848484) internal successors, (2767), 33 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:04:51,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:04:51,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 171 [2022-11-16 11:04:51,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:08,729 INFO L130 PetriNetUnfolder]: 7589/16298 cut-off events. [2022-11-16 11:05:08,729 INFO L131 PetriNetUnfolder]: For 21779/21991 co-relation queries the response was YES. [2022-11-16 11:05:08,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40153 conditions, 16298 events. 7589/16298 cut-off events. For 21779/21991 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 139472 event pairs, 404 based on Foata normal form. 438/15939 useless extension candidates. Maximal degree in co-relation 40128. Up to 2517 conditions per place. [2022-11-16 11:05:08,867 INFO L137 encePairwiseOnDemand]: 125/171 looper letters, 875 selfloop transitions, 424 changer transitions 246/1621 dead transitions. [2022-11-16 11:05:08,868 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1621 transitions, 8941 flow [2022-11-16 11:05:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-16 11:05:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2022-11-16 11:05:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 16545 transitions. [2022-11-16 11:05:08,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5013180619943641 [2022-11-16 11:05:08,900 INFO L72 ComplementDD]: Start complementDD. Operand 193 states and 16545 transitions. [2022-11-16 11:05:08,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 193 states and 16545 transitions. [2022-11-16 11:05:08,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:08,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 193 states and 16545 transitions. [2022-11-16 11:05:08,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 194 states, 193 states have (on average 85.72538860103627) internal successors, (16545), 193 states have internal predecessors, (16545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:09,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 194 states, 194 states have (on average 171.0) internal successors, (33174), 194 states have internal predecessors, (33174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:09,020 INFO L81 ComplementDD]: Finished complementDD. Result has 194 states, 194 states have (on average 171.0) internal successors, (33174), 194 states have internal predecessors, (33174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:09,020 INFO L175 Difference]: Start difference. First operand has 193 places, 177 transitions, 744 flow. Second operand 193 states and 16545 transitions. [2022-11-16 11:05:09,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1621 transitions, 8941 flow [2022-11-16 11:05:09,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1621 transitions, 8757 flow, removed 17 selfloop flow, removed 5 redundant places. [2022-11-16 11:05:09,088 INFO L231 Difference]: Finished difference. Result has 522 places, 618 transitions, 4626 flow [2022-11-16 11:05:09,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=193, PETRI_FLOW=4626, PETRI_PLACES=522, PETRI_TRANSITIONS=618} [2022-11-16 11:05:09,090 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 369 predicate places. [2022-11-16 11:05:09,090 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 618 transitions, 4626 flow [2022-11-16 11:05:09,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 83.84848484848484) internal successors, (2767), 33 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:09,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:09,092 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:09,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:09,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:09,301 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:05:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash 227376516, now seen corresponding path program 2 times [2022-11-16 11:05:09,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:09,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490071426] [2022-11-16 11:05:09,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:09,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:13,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:13,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490071426] [2022-11-16 11:05:13,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490071426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:13,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425805619] [2022-11-16 11:05:13,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:05:13,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:13,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:13,163 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:13,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:05:13,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:05:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:05:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:05:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:14,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:05:14,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:05:14,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:05:16,043 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 11:05:16,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2022-11-16 11:05:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:16,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:19,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:05:19,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 106 [2022-11-16 11:05:19,107 INFO L321 Elim1Store]: treesize reduction 5, result has 92.8 percent of original size [2022-11-16 11:05:19,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 592 treesize of output 575 [2022-11-16 11:05:19,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:05:19,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:05:19,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 304 treesize of output 292 [2022-11-16 11:05:19,293 INFO L321 Elim1Store]: treesize reduction 12, result has 85.9 percent of original size [2022-11-16 11:05:19,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 496 treesize of output 376 [2022-11-16 11:05:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:21,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425805619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:05:21,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:05:21,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30, 28] total 80 [2022-11-16 11:05:21,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365188955] [2022-11-16 11:05:21,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:05:21,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-16 11:05:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-16 11:05:21,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=5704, Unknown=26, NotChecked=0, Total=6320 [2022-11-16 11:05:21,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 171 [2022-11-16 11:05:21,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 618 transitions, 4626 flow. Second operand has 80 states, 80 states have (on average 68.8875) internal successors, (5511), 80 states have internal predecessors, (5511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:21,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:21,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 171 [2022-11-16 11:05:21,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:34,771 INFO L130 PetriNetUnfolder]: 28312/63793 cut-off events. [2022-11-16 11:06:34,771 INFO L131 PetriNetUnfolder]: For 1635121/1637899 co-relation queries the response was YES. [2022-11-16 11:06:35,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364418 conditions, 63793 events. 28312/63793 cut-off events. For 1635121/1637899 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 691489 event pairs, 3327 based on Foata normal form. 752/62236 useless extension candidates. Maximal degree in co-relation 364252. Up to 14163 conditions per place. [2022-11-16 11:06:36,351 INFO L137 encePairwiseOnDemand]: 128/171 looper letters, 2025 selfloop transitions, 1209 changer transitions 510/4002 dead transitions. [2022-11-16 11:06:36,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 4002 transitions, 44567 flow [2022-11-16 11:06:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2022-11-16 11:06:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2022-11-16 11:06:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 19672 transitions. [2022-11-16 11:06:36,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4245052976845558 [2022-11-16 11:06:36,387 INFO L72 ComplementDD]: Start complementDD. Operand 271 states and 19672 transitions. [2022-11-16 11:06:36,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 271 states and 19672 transitions. [2022-11-16 11:06:36,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:36,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 271 states and 19672 transitions. [2022-11-16 11:06:36,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 272 states, 271 states have (on average 72.59040590405904) internal successors, (19672), 271 states have internal predecessors, (19672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:36,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 272 states, 272 states have (on average 171.0) internal successors, (46512), 272 states have internal predecessors, (46512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:36,514 INFO L81 ComplementDD]: Finished complementDD. Result has 272 states, 272 states have (on average 171.0) internal successors, (46512), 272 states have internal predecessors, (46512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:36,515 INFO L175 Difference]: Start difference. First operand has 522 places, 618 transitions, 4626 flow. Second operand 271 states and 19672 transitions. [2022-11-16 11:06:36,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 4002 transitions, 44567 flow [2022-11-16 11:06:54,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 4002 transitions, 42611 flow, removed 859 selfloop flow, removed 25 redundant places. [2022-11-16 11:06:54,597 INFO L231 Difference]: Finished difference. Result has 935 places, 1949 transitions, 20514 flow [2022-11-16 11:06:54,599 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=4209, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=271, PETRI_FLOW=20514, PETRI_PLACES=935, PETRI_TRANSITIONS=1949} [2022-11-16 11:06:54,600 INFO L288 CegarLoopForPetriNet]: 153 programPoint places, 782 predicate places. [2022-11-16 11:06:54,600 INFO L495 AbstractCegarLoop]: Abstraction has has 935 places, 1949 transitions, 20514 flow [2022-11-16 11:06:54,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 68.8875) internal successors, (5511), 80 states have internal predecessors, (5511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:54,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:54,602 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:54,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:54,802 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:54,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1167897980, now seen corresponding path program 3 times [2022-11-16 11:06:54,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:54,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723208728] [2022-11-16 11:06:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:54,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:56,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:56,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723208728] [2022-11-16 11:06:56,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723208728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:56,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341801861] [2022-11-16 11:06:56,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:56,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:56,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:56,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:56,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c2ce7e1-5303-486c-83b5-37b952687d95/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:06:56,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:06:56,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:56,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:06:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:57,925 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-16 11:06:57,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-16 11:06:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:06:57,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:58,439 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-16 11:06:58,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 11:06:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:06:59,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341801861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:59,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:59,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 20, 20] total 54 [2022-11-16 11:06:59,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863599307] [2022-11-16 11:06:59,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:59,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 11:06:59,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:59,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 11:06:59,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2566, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:06:59,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 171 [2022-11-16 11:06:59,071 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 935 places, 1949 transitions, 20514 flow. Second operand has 54 states, 54 states have (on average 79.55555555555556) internal successors, (4296), 54 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:59,071 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:59,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 171 [2022-11-16 11:06:59,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand