./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/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_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/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_15bc6565-26ad-42f0-b913-30729b29f6c5/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 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 --- 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 12:37:05,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:37:05,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:37:05,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:37:05,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:37:05,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:37:05,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:37:05,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:37:05,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:37:05,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:37:05,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:37:05,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:37:05,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:37:05,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:37:05,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:37:05,509 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:37:05,510 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:37:05,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:37:05,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:37:05,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:37:05,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:37:05,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:37:05,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:37:05,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:37:05,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:37:05,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:37:05,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:37:05,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:37:05,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:37:05,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:37:05,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:37:05,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:37:05,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:37:05,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:37:05,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:37:05,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:37:05,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:37:05,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:37:05,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:37:05,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:37:05,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:37:05,573 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:37:05,629 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:37:05,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:37:05,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:37:05,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:37:05,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:37:05,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:37:05,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:37:05,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:37:05,634 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:37:05,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:37:05,636 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:37:05,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:37:05,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:37:05,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:37:05,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:37:05,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:37:05,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:37:05,638 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:37:05,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:37:05,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:37:05,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:37:05,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:37:05,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:37:05,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:37:05,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:37:05,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:37:05,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:37:05,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:37:05,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:37:05,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:37:05,644 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:37:05,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:37:05,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:37:05,645 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_15bc6565-26ad-42f0-b913-30729b29f6c5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 [2022-11-16 12:37:06,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:37:06,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:37:06,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:37:06,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:37:06,048 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:37:06,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2022-11-16 12:37:06,135 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/data/502de5459/df6bd93e891e454e81b05bf5c62cff4b/FLAGb64a8888d [2022-11-16 12:37:06,639 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:37:06,641 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2022-11-16 12:37:06,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/data/502de5459/df6bd93e891e454e81b05bf5c62cff4b/FLAGb64a8888d [2022-11-16 12:37:07,002 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/data/502de5459/df6bd93e891e454e81b05bf5c62cff4b [2022-11-16 12:37:07,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:37:07,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:37:07,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:37:07,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:37:07,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:37:07,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@913a027 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07, skipping insertion in model container [2022-11-16 12:37:07,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:37:07,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:37:07,226 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_15bc6565-26ad-42f0-b913-30729b29f6c5/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c[1849,1862] [2022-11-16 12:37:07,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:37:07,242 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:37:07,278 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_15bc6565-26ad-42f0-b913-30729b29f6c5/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c[1849,1862] [2022-11-16 12:37:07,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:37:07,300 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:37:07,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07 WrapperNode [2022-11-16 12:37:07,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:37:07,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:37:07,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:37:07,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:37:07,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,321 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,349 INFO L138 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2022-11-16 12:37:07,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:37:07,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:37:07,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:37:07,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:37:07,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,395 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:37:07,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:37:07,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:37:07,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:37:07,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (1/1) ... [2022-11-16 12:37:07,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:37:07,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:37:07,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:37:07,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:37:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:37:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:37:07,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:37:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:37:07,492 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:37:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:37:07,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:37:07,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:37:07,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:37:07,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:37:07,493 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:37:07,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:37:07,495 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 12:37:07,641 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:37:07,643 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:37:07,820 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:37:07,829 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:37:07,829 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:37:07,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:07 BoogieIcfgContainer [2022-11-16 12:37:07,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:37:07,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:37:07,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:37:07,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:37:07,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:37:07" (1/3) ... [2022-11-16 12:37:07,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567ffdd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:37:07, skipping insertion in model container [2022-11-16 12:37:07,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:37:07" (2/3) ... [2022-11-16 12:37:07,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@567ffdd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:37:07, skipping insertion in model container [2022-11-16 12:37:07,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:37:07" (3/3) ... [2022-11-16 12:37:07,844 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2022-11-16 12:37:07,853 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:37:07,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:37:07,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:37:07,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:37:07,925 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:37:07,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2022-11-16 12:37:08,026 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2022-11-16 12:37:08,026 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:37:08,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-16 12:37:08,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2022-11-16 12:37:08,035 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2022-11-16 12:37:08,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:37:08,065 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;@7c32847e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:37:08,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:37:08,125 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2022-11-16 12:37:08,125 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:37:08,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:37:08,127 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] [2022-11-16 12:37:08,128 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 12:37:08,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:08,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1261919570, now seen corresponding path program 1 times [2022-11-16 12:37:08,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:08,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886699282] [2022-11-16 12:37:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:08,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:37:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:08,543 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 12:37:08,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:37:08,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886699282] [2022-11-16 12:37:08,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886699282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:37:08,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:37:08,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:37:08,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326183458] [2022-11-16 12:37:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:37:08,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:37:08,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:37:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:37:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:37:08,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 81 [2022-11-16 12:37:08,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 152 flow. Second operand has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 12:37:08,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:37:08,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 81 [2022-11-16 12:37:08,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:37:08,688 INFO L130 PetriNetUnfolder]: 2/66 cut-off events. [2022-11-16 12:37:08,688 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 12:37:08,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 0 based on Foata normal form. 6/68 useless extension candidates. Maximal degree in co-relation 47. Up to 5 conditions per place. [2022-11-16 12:37:08,690 INFO L137 encePairwiseOnDemand]: 77/81 looper letters, 4 selfloop transitions, 0 changer transitions 2/66 dead transitions. [2022-11-16 12:37:08,690 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2022-11-16 12:37:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:37:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:37:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-11-16 12:37:08,703 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9382716049382716 [2022-11-16 12:37:08,704 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-11-16 12:37:08,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-11-16 12:37:08,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:37:08,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-11-16 12:37:08,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 12:37:08,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 12:37:08,728 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 12:37:08,730 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 152 flow. Second operand 2 states and 152 transitions. [2022-11-16 12:37:08,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2022-11-16 12:37:08,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:37:08,742 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 132 flow [2022-11-16 12:37:08,745 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=132, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2022-11-16 12:37:08,750 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-11-16 12:37:08,751 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 132 flow [2022-11-16 12:37:08,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 75.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 12:37:08,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:37:08,752 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] [2022-11-16 12:37:08,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:37:08,753 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 12:37:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2129909204, now seen corresponding path program 1 times [2022-11-16 12:37:08,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:08,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82397251] [2022-11-16 12:37:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:08,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:37:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:09,455 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 12:37:09,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:37:09,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82397251] [2022-11-16 12:37:09,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82397251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:37:09,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:37:09,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:37:09,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25703139] [2022-11-16 12:37:09,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:37:09,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:37:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:37:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:37:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:37:09,467 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 81 [2022-11-16 12:37:09,468 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 54.57142857142857) internal successors, (382), 7 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 12:37:09,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:37:09,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 81 [2022-11-16 12:37:09,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:37:09,726 INFO L130 PetriNetUnfolder]: 31/147 cut-off events. [2022-11-16 12:37:09,727 INFO L131 PetriNetUnfolder]: For 8/14 co-relation queries the response was YES. [2022-11-16 12:37:09,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 147 events. 31/147 cut-off events. For 8/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 363 event pairs, 13 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 232. Up to 48 conditions per place. [2022-11-16 12:37:09,729 INFO L137 encePairwiseOnDemand]: 73/81 looper letters, 25 selfloop transitions, 5 changer transitions 4/76 dead transitions. [2022-11-16 12:37:09,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 227 flow [2022-11-16 12:37:09,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:37:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:37:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 399 transitions. [2022-11-16 12:37:09,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2022-11-16 12:37:09,733 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 399 transitions. [2022-11-16 12:37:09,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 399 transitions. [2022-11-16 12:37:09,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:37:09,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 399 transitions. [2022-11-16 12:37:09,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states 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 12:37:09,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:37:09,738 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:37:09,739 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 132 flow. Second operand 7 states and 399 transitions. [2022-11-16 12:37:09,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 227 flow [2022-11-16 12:37:09,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:37:09,741 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 159 flow [2022-11-16 12:37:09,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2022-11-16 12:37:09,743 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-11-16 12:37:09,743 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 159 flow [2022-11-16 12:37:09,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.57142857142857) internal successors, (382), 7 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 12:37:09,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:37:09,744 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] [2022-11-16 12:37:09,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:37:09,744 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 12:37:09,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -179536692, now seen corresponding path program 1 times [2022-11-16 12:37:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:09,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481479837] [2022-11-16 12:37:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:37:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:10,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:37:10,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481479837] [2022-11-16 12:37:10,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481479837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:37:10,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:37:10,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:37:10,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076227139] [2022-11-16 12:37:10,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:37:10,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:37:10,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:37:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:37:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:37:10,091 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:37:10,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 12:37:10,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:37:10,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:37:10,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:37:10,344 INFO L130 PetriNetUnfolder]: 29/141 cut-off events. [2022-11-16 12:37:10,347 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-16 12:37:10,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 141 events. 29/141 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 366 event pairs, 3 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 255. Up to 33 conditions per place. [2022-11-16 12:37:10,351 INFO L137 encePairwiseOnDemand]: 68/81 looper letters, 24 selfloop transitions, 16 changer transitions 4/84 dead transitions. [2022-11-16 12:37:10,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 84 transitions, 298 flow [2022-11-16 12:37:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:37:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:37:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 394 transitions. [2022-11-16 12:37:10,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6948853615520282 [2022-11-16 12:37:10,359 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 394 transitions. [2022-11-16 12:37:10,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 394 transitions. [2022-11-16 12:37:10,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:37:10,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 394 transitions. [2022-11-16 12:37:10,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 12:37:10,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:37:10,368 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:37:10,369 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 159 flow. Second operand 7 states and 394 transitions. [2022-11-16 12:37:10,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 84 transitions, 298 flow [2022-11-16 12:37:10,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 285 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-16 12:37:10,374 INFO L231 Difference]: Finished difference. Result has 77 places, 72 transitions, 225 flow [2022-11-16 12:37:10,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=77, PETRI_TRANSITIONS=72} [2022-11-16 12:37:10,378 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2022-11-16 12:37:10,378 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 72 transitions, 225 flow [2022-11-16 12:37:10,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 12:37:10,379 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:37:10,379 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] [2022-11-16 12:37:10,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:37:10,380 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 12:37:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:10,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1097713906, now seen corresponding path program 2 times [2022-11-16 12:37:10,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:10,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402154021] [2022-11-16 12:37:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:10,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:37:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:10,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:37:10,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402154021] [2022-11-16 12:37:10,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402154021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:37:10,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:37:10,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:37:10,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733408291] [2022-11-16 12:37:10,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:37:10,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:37:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:37:10,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:37:10,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:37:10,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:37:10,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 72 transitions, 225 flow. Second operand has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 12:37:10,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:37:10,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:37:10,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:37:10,816 INFO L130 PetriNetUnfolder]: 28/153 cut-off events. [2022-11-16 12:37:10,816 INFO L131 PetriNetUnfolder]: For 64/69 co-relation queries the response was YES. [2022-11-16 12:37:10,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331 conditions, 153 events. 28/153 cut-off events. For 64/69 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 440 event pairs, 3 based on Foata normal form. 6/156 useless extension candidates. Maximal degree in co-relation 323. Up to 39 conditions per place. [2022-11-16 12:37:10,821 INFO L137 encePairwiseOnDemand]: 70/81 looper letters, 28 selfloop transitions, 17 changer transitions 4/89 dead transitions. [2022-11-16 12:37:10,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 89 transitions, 394 flow [2022-11-16 12:37:10,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:37:10,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:37:10,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 394 transitions. [2022-11-16 12:37:10,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6948853615520282 [2022-11-16 12:37:10,824 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 394 transitions. [2022-11-16 12:37:10,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 394 transitions. [2022-11-16 12:37:10,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:37:10,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 394 transitions. [2022-11-16 12:37:10,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 56.285714285714285) internal successors, (394), 7 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 12:37:10,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:37:10,833 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:37:10,833 INFO L175 Difference]: Start difference. First operand has 77 places, 72 transitions, 225 flow. Second operand 7 states and 394 transitions. [2022-11-16 12:37:10,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 89 transitions, 394 flow [2022-11-16 12:37:10,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 89 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-16 12:37:10,840 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 323 flow [2022-11-16 12:37:10,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=323, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2022-11-16 12:37:10,842 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2022-11-16 12:37:10,842 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 323 flow [2022-11-16 12:37:10,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 12:37:10,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:37:10,847 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] [2022-11-16 12:37:10,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:37:10,848 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 12:37:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1754793516, now seen corresponding path program 1 times [2022-11-16 12:37:10,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:10,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725442344] [2022-11-16 12:37:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:10,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:37:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:11,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:37:11,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725442344] [2022-11-16 12:37:11,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725442344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:11,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659464064] [2022-11-16 12:37:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:11,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:37:11,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:37:11,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:37:11,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:37:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:11,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:37:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:11,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:12,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659464064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:12,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:37:12,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-11-16 12:37:12,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792808674] [2022-11-16 12:37:12,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:12,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 12:37:12,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:37:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 12:37:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-11-16 12:37:12,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:37:12,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 323 flow. Second operand has 13 states, 13 states have (on average 53.07692307692308) internal successors, (690), 13 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:12,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:37:12,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:37:12,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:37:12,569 INFO L130 PetriNetUnfolder]: 35/174 cut-off events. [2022-11-16 12:37:12,569 INFO L131 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2022-11-16 12:37:12,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 174 events. 35/174 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 506 event pairs, 0 based on Foata normal form. 5/178 useless extension candidates. Maximal degree in co-relation 483. Up to 40 conditions per place. [2022-11-16 12:37:12,572 INFO L137 encePairwiseOnDemand]: 70/81 looper letters, 47 selfloop transitions, 17 changer transitions 3/107 dead transitions. [2022-11-16 12:37:12,572 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 107 transitions, 622 flow [2022-11-16 12:37:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:37:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 12:37:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 609 transitions. [2022-11-16 12:37:12,575 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6835016835016835 [2022-11-16 12:37:12,576 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 609 transitions. [2022-11-16 12:37:12,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 609 transitions. [2022-11-16 12:37:12,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:37:12,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 609 transitions. [2022-11-16 12:37:12,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.36363636363637) internal successors, (609), 11 states have internal predecessors, (609), 0 states have call successors, (0), 0 states 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 12:37:12,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 12:37:12,581 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states 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 12:37:12,581 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 323 flow. Second operand 11 states and 609 transitions. [2022-11-16 12:37:12,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 107 transitions, 622 flow [2022-11-16 12:37:12,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 107 transitions, 616 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-16 12:37:12,591 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 417 flow [2022-11-16 12:37:12,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=417, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2022-11-16 12:37:12,594 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 26 predicate places. [2022-11-16 12:37:12,594 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 417 flow [2022-11-16 12:37:12,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 53.07692307692308) internal successors, (690), 13 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:37:12,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:37:12,595 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] [2022-11-16 12:37:12,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:37:12,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:37:12,801 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 12:37:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:12,801 INFO L85 PathProgramCache]: Analyzing trace with hash 87338448, now seen corresponding path program 2 times [2022-11-16 12:37:12,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:12,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323582161] [2022-11-16 12:37:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:12,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:37:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:13,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:37:13,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323582161] [2022-11-16 12:37:13,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323582161] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:37:13,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:37:13,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:37:13,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404310169] [2022-11-16 12:37:13,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:37:13,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:37:13,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:37:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:37:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:37:13,009 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:37:13,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 417 flow. Second operand has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 12:37:13,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:37:13,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:37:13,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:37:13,163 INFO L130 PetriNetUnfolder]: 35/153 cut-off events. [2022-11-16 12:37:13,163 INFO L131 PetriNetUnfolder]: For 300/300 co-relation queries the response was YES. [2022-11-16 12:37:13,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 153 events. 35/153 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 384 event pairs, 5 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 497. Up to 42 conditions per place. [2022-11-16 12:37:13,165 INFO L137 encePairwiseOnDemand]: 69/81 looper letters, 36 selfloop transitions, 15 changer transitions 1/92 dead transitions. [2022-11-16 12:37:13,165 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 92 transitions, 573 flow [2022-11-16 12:37:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:37:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:37:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 387 transitions. [2022-11-16 12:37:13,167 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6825396825396826 [2022-11-16 12:37:13,167 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 387 transitions. [2022-11-16 12:37:13,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 387 transitions. [2022-11-16 12:37:13,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:37:13,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 387 transitions. [2022-11-16 12:37:13,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 55.285714285714285) internal successors, (387), 7 states have internal predecessors, (387), 0 states have call successors, (0), 0 states 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 12:37:13,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:37:13,171 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states 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 12:37:13,171 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 417 flow. Second operand 7 states and 387 transitions. [2022-11-16 12:37:13,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 92 transitions, 573 flow [2022-11-16 12:37:13,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 92 transitions, 543 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-11-16 12:37:13,180 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 448 flow [2022-11-16 12:37:13,181 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=448, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2022-11-16 12:37:13,183 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 29 predicate places. [2022-11-16 12:37:13,184 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 448 flow [2022-11-16 12:37:13,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states 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 12:37:13,184 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:37:13,184 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:37:13,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:37:13,185 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 12:37:13,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:37:13,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1648224648, now seen corresponding path program 1 times [2022-11-16 12:37:13,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:37:13,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815230252] [2022-11-16 12:37:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:37:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:14,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:37:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815230252] [2022-11-16 12:37:14,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815230252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:37:14,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896977162] [2022-11-16 12:37:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:37:14,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:37:14,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:37:14,064 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:37:14,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:37:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:37:14,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:37:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:37:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:27,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:37:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:37:39,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896977162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:37:39,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:37:39,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-11-16 12:37:39,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510746423] [2022-11-16 12:37:39,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:37:39,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:37:39,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:37:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:37:39,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=503, Unknown=3, NotChecked=0, Total=650 [2022-11-16 12:37:39,023 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:37:39,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 448 flow. Second operand has 26 states, 26 states have (on average 52.0) internal successors, (1352), 26 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 12:37:39,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:37:39,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:37:39,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:37:49,072 WARN L233 SmtUtils]: Spent 7.25s on a formula simplification. DAG size of input: 38 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:37:55,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:57,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:37:59,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:00,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:02,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:03,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:07,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:08,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:11,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:13,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:15,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:19,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:24,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:29,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:38:35,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:39:00,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:39:02,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:39:24,238 WARN L233 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 72 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:39:30,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:39:32,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:39:39,568 INFO L130 PetriNetUnfolder]: 136/497 cut-off events. [2022-11-16 12:39:39,568 INFO L131 PetriNetUnfolder]: For 1328/1339 co-relation queries the response was YES. [2022-11-16 12:39:39,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1808 conditions, 497 events. 136/497 cut-off events. For 1328/1339 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2678 event pairs, 7 based on Foata normal form. 8/501 useless extension candidates. Maximal degree in co-relation 1789. Up to 93 conditions per place. [2022-11-16 12:39:39,573 INFO L137 encePairwiseOnDemand]: 67/81 looper letters, 83 selfloop transitions, 109 changer transitions 19/251 dead transitions. [2022-11-16 12:39:39,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 251 transitions, 2234 flow [2022-11-16 12:39:39,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-16 12:39:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-16 12:39:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2210 transitions. [2022-11-16 12:39:39,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6654622101776574 [2022-11-16 12:39:39,582 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2210 transitions. [2022-11-16 12:39:39,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2210 transitions. [2022-11-16 12:39:39,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:39:39,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2210 transitions. [2022-11-16 12:39:39,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 53.90243902439025) internal successors, (2210), 41 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 12:39:39,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 81.0) internal successors, (3402), 42 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states 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 12:39:39,597 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 81.0) internal successors, (3402), 42 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states 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 12:39:39,598 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 448 flow. Second operand 41 states and 2210 transitions. [2022-11-16 12:39:39,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 251 transitions, 2234 flow [2022-11-16 12:39:39,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 251 transitions, 2162 flow, removed 27 selfloop flow, removed 5 redundant places. [2022-11-16 12:39:39,610 INFO L231 Difference]: Finished difference. Result has 151 places, 191 transitions, 1868 flow [2022-11-16 12:39:39,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1868, PETRI_PLACES=151, PETRI_TRANSITIONS=191} [2022-11-16 12:39:39,611 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 80 predicate places. [2022-11-16 12:39:39,611 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 191 transitions, 1868 flow [2022-11-16 12:39:39,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 52.0) internal successors, (1352), 26 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states 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 12:39:39,612 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:39:39,612 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] [2022-11-16 12:39:39,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:39:39,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:39,819 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 12:39:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:39:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1794719970, now seen corresponding path program 2 times [2022-11-16 12:39:39,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:39:39,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119097627] [2022-11-16 12:39:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:39:39,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:39:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:39:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:39:40,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119097627] [2022-11-16 12:39:40,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119097627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:39:40,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633241822] [2022-11-16 12:39:40,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:39:40,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:39:40,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:39:40,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:39:40,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:39:40,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:39:40,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:39:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 12:39:40,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:39:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:56,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:39:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:39:58,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633241822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:39:58,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:39:58,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2022-11-16 12:39:58,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677194828] [2022-11-16 12:39:58,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:39:58,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:39:58,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:39:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:39:58,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=494, Unknown=2, NotChecked=0, Total=650 [2022-11-16 12:39:58,203 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:39:58,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 191 transitions, 1868 flow. Second operand has 26 states, 26 states have (on average 51.96153846153846) internal successors, (1351), 26 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states 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 12:39:58,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:39:58,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:39:58,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:39:59,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:04,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:06,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:10,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:13,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:15,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:28,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:34,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:37,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:39,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:41,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:43,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:45,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:47,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:50,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:40:53,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:41:08,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:41:13,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:41:21,233 INFO L130 PetriNetUnfolder]: 198/816 cut-off events. [2022-11-16 12:41:21,233 INFO L131 PetriNetUnfolder]: For 3608/3608 co-relation queries the response was YES. [2022-11-16 12:41:21,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3483 conditions, 816 events. 198/816 cut-off events. For 3608/3608 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5516 event pairs, 5 based on Foata normal form. 7/821 useless extension candidates. Maximal degree in co-relation 3449. Up to 178 conditions per place. [2022-11-16 12:41:21,243 INFO L137 encePairwiseOnDemand]: 67/81 looper letters, 121 selfloop transitions, 189 changer transitions 16/366 dead transitions. [2022-11-16 12:41:21,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 366 transitions, 4410 flow [2022-11-16 12:41:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 12:41:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-16 12:41:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1705 transitions. [2022-11-16 12:41:21,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6790123456790124 [2022-11-16 12:41:21,249 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1705 transitions. [2022-11-16 12:41:21,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1705 transitions. [2022-11-16 12:41:21,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:21,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1705 transitions. [2022-11-16 12:41:21,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.0) internal successors, (1705), 31 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states 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 12:41:21,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 81.0) internal successors, (2592), 32 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 12:41:21,262 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 81.0) internal successors, (2592), 32 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states 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 12:41:21,262 INFO L175 Difference]: Start difference. First operand has 151 places, 191 transitions, 1868 flow. Second operand 31 states and 1705 transitions. [2022-11-16 12:41:21,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 366 transitions, 4410 flow [2022-11-16 12:41:21,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 366 transitions, 3855 flow, removed 267 selfloop flow, removed 12 redundant places. [2022-11-16 12:41:21,298 INFO L231 Difference]: Finished difference. Result has 181 places, 290 transitions, 3472 flow [2022-11-16 12:41:21,299 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3472, PETRI_PLACES=181, PETRI_TRANSITIONS=290} [2022-11-16 12:41:21,299 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 110 predicate places. [2022-11-16 12:41:21,300 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 290 transitions, 3472 flow [2022-11-16 12:41:21,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 51.96153846153846) internal successors, (1351), 26 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states 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 12:41:21,301 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:21,301 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-16 12:41:21,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:21,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:41:21,516 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 12:41:21,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:21,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1133013186, now seen corresponding path program 3 times [2022-11-16 12:41:21,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:21,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338426520] [2022-11-16 12:41:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:21,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:21,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:21,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338426520] [2022-11-16 12:41:21,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338426520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:21,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065752622] [2022-11-16 12:41:21,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:41:21,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:21,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:21,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:21,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:41:28,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:41:28,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 12:41:28,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:41:29,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:41:29,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065752622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:41:29,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:41:29,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-16 12:41:29,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877269928] [2022-11-16 12:41:29,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:41:29,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:41:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:41:29,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:41:29,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:41:29,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 290 transitions, 3472 flow. Second operand has 6 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 12:41:29,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:29,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:41:29,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:29,496 INFO L130 PetriNetUnfolder]: 86/382 cut-off events. [2022-11-16 12:41:29,496 INFO L131 PetriNetUnfolder]: For 2540/2540 co-relation queries the response was YES. [2022-11-16 12:41:29,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 382 events. 86/382 cut-off events. For 2540/2540 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1813 event pairs, 6 based on Foata normal form. 3/380 useless extension candidates. Maximal degree in co-relation 1824. Up to 220 conditions per place. [2022-11-16 12:41:29,502 INFO L137 encePairwiseOnDemand]: 74/81 looper letters, 121 selfloop transitions, 6 changer transitions 0/167 dead transitions. [2022-11-16 12:41:29,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 167 transitions, 2046 flow [2022-11-16 12:41:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:41:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:41:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2022-11-16 12:41:29,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6810699588477366 [2022-11-16 12:41:29,504 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 331 transitions. [2022-11-16 12:41:29,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 331 transitions. [2022-11-16 12:41:29,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:29,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 331 transitions. [2022-11-16 12:41:29,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.166666666666664) internal successors, (331), 6 states have internal predecessors, (331), 0 states have call successors, (0), 0 states 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 12:41:29,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states 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 12:41:29,507 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states 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 12:41:29,507 INFO L175 Difference]: Start difference. First operand has 181 places, 290 transitions, 3472 flow. Second operand 6 states and 331 transitions. [2022-11-16 12:41:29,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 167 transitions, 2046 flow [2022-11-16 12:41:29,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1890 flow, removed 56 selfloop flow, removed 20 redundant places. [2022-11-16 12:41:29,528 INFO L231 Difference]: Finished difference. Result has 132 places, 165 transitions, 1633 flow [2022-11-16 12:41:29,529 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=1621, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1633, PETRI_PLACES=132, PETRI_TRANSITIONS=165} [2022-11-16 12:41:29,530 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 61 predicate places. [2022-11-16 12:41:29,530 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 165 transitions, 1633 flow [2022-11-16 12:41:29,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.333333333333336) internal successors, (326), 6 states have internal predecessors, (326), 0 states have call successors, (0), 0 states 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 12:41:29,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:29,531 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-16 12:41:29,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 12:41:29,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:29,738 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 12:41:29,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:29,738 INFO L85 PathProgramCache]: Analyzing trace with hash -865022888, now seen corresponding path program 4 times [2022-11-16 12:41:29,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:29,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995674232] [2022-11-16 12:41:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:29,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:30,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:30,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995674232] [2022-11-16 12:41:30,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995674232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:30,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953468672] [2022-11-16 12:41:30,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:41:30,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:30,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:30,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:30,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:41:31,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:41:31,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:31,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:41:31,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:32,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:32,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953468672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:32,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:32,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 22 [2022-11-16 12:41:32,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480335720] [2022-11-16 12:41:32,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:32,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:41:32,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:32,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:41:32,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:41:32,840 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:41:32,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 165 transitions, 1633 flow. Second operand has 22 states, 22 states have (on average 52.72727272727273) internal successors, (1160), 22 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 12:41:32,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:32,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:41:32,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:40,253 INFO L130 PetriNetUnfolder]: 108/418 cut-off events. [2022-11-16 12:41:40,254 INFO L131 PetriNetUnfolder]: For 2169/2169 co-relation queries the response was YES. [2022-11-16 12:41:40,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2079 conditions, 418 events. 108/418 cut-off events. For 2169/2169 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1975 event pairs, 4 based on Foata normal form. 17/431 useless extension candidates. Maximal degree in co-relation 2048. Up to 122 conditions per place. [2022-11-16 12:41:40,258 INFO L137 encePairwiseOnDemand]: 70/81 looper letters, 102 selfloop transitions, 88 changer transitions 0/230 dead transitions. [2022-11-16 12:41:40,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 230 transitions, 2946 flow [2022-11-16 12:41:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:41:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:41:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1030 transitions. [2022-11-16 12:41:40,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6692657569850552 [2022-11-16 12:41:40,262 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1030 transitions. [2022-11-16 12:41:40,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1030 transitions. [2022-11-16 12:41:40,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:40,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1030 transitions. [2022-11-16 12:41:40,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 54.21052631578947) internal successors, (1030), 19 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states 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 12:41:40,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 81.0) internal successors, (1620), 20 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states 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 12:41:40,269 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 81.0) internal successors, (1620), 20 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states 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 12:41:40,269 INFO L175 Difference]: Start difference. First operand has 132 places, 165 transitions, 1633 flow. Second operand 19 states and 1030 transitions. [2022-11-16 12:41:40,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 230 transitions, 2946 flow [2022-11-16 12:41:40,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 230 transitions, 2930 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-16 12:41:40,292 INFO L231 Difference]: Finished difference. Result has 154 places, 194 transitions, 2414 flow [2022-11-16 12:41:40,293 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2414, PETRI_PLACES=154, PETRI_TRANSITIONS=194} [2022-11-16 12:41:40,294 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 83 predicate places. [2022-11-16 12:41:40,294 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 194 transitions, 2414 flow [2022-11-16 12:41:40,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 52.72727272727273) internal successors, (1160), 22 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states 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 12:41:40,295 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:40,295 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-16 12:41:40,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 12:41:40,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:41:40,501 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 12:41:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash 717979804, now seen corresponding path program 5 times [2022-11-16 12:41:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:40,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458553678] [2022-11-16 12:41:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:40,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:40,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458553678] [2022-11-16 12:41:40,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458553678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736072587] [2022-11-16 12:41:40,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:41:40,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:40,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:40,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:40,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:41:41,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:41:41,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:41,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:41:41,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:41:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:41,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:41:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:41,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736072587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:41:41,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:41:41,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-11-16 12:41:41,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208057724] [2022-11-16 12:41:41,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:41:41,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:41:41,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:41:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:41:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:41:41,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:41:41,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 194 transitions, 2414 flow. Second operand has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:41,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:41:41,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:41:41,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:41:45,817 INFO L130 PetriNetUnfolder]: 134/603 cut-off events. [2022-11-16 12:41:45,818 INFO L131 PetriNetUnfolder]: For 4379/4379 co-relation queries the response was YES. [2022-11-16 12:41:45,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3114 conditions, 603 events. 134/603 cut-off events. For 4379/4379 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3456 event pairs, 6 based on Foata normal form. 14/611 useless extension candidates. Maximal degree in co-relation 3074. Up to 142 conditions per place. [2022-11-16 12:41:45,823 INFO L137 encePairwiseOnDemand]: 69/81 looper letters, 141 selfloop transitions, 76 changer transitions 6/263 dead transitions. [2022-11-16 12:41:45,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 263 transitions, 3764 flow [2022-11-16 12:41:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:41:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:41:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 983 transitions. [2022-11-16 12:41:45,827 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6742112482853223 [2022-11-16 12:41:45,827 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 983 transitions. [2022-11-16 12:41:45,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 983 transitions. [2022-11-16 12:41:45,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:41:45,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 983 transitions. [2022-11-16 12:41:45,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 54.611111111111114) internal successors, (983), 18 states have internal predecessors, (983), 0 states have call successors, (0), 0 states 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 12:41:45,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 81.0) internal successors, (1539), 19 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 12:41:45,834 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 81.0) internal successors, (1539), 19 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 12:41:45,834 INFO L175 Difference]: Start difference. First operand has 154 places, 194 transitions, 2414 flow. Second operand 18 states and 983 transitions. [2022-11-16 12:41:45,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 263 transitions, 3764 flow [2022-11-16 12:41:45,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 263 transitions, 3712 flow, removed 17 selfloop flow, removed 6 redundant places. [2022-11-16 12:41:45,873 INFO L231 Difference]: Finished difference. Result has 172 places, 218 transitions, 3140 flow [2022-11-16 12:41:45,874 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3140, PETRI_PLACES=172, PETRI_TRANSITIONS=218} [2022-11-16 12:41:45,874 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 101 predicate places. [2022-11-16 12:41:45,874 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 218 transitions, 3140 flow [2022-11-16 12:41:45,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 52.666666666666664) internal successors, (948), 18 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:41:45,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:41:45,875 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-16 12:41:45,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:41:46,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:41:46,081 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 12:41:46,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:41:46,082 INFO L85 PathProgramCache]: Analyzing trace with hash -157219846, now seen corresponding path program 6 times [2022-11-16 12:41:46,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:41:46,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400279846] [2022-11-16 12:41:46,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:41:46,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:41:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:41:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:41:46,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:41:46,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400279846] [2022-11-16 12:41:46,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400279846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:41:46,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441658402] [2022-11-16 12:41:46,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:41:46,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:41:46,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:41:46,498 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:41:46,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:41:59,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:41:59,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:41:59,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:41:59,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:42:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:09,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:42:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:13,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441658402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:42:13,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:42:13,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-11-16 12:42:13,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742013261] [2022-11-16 12:42:13,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:42:13,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:42:13,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:42:13,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:42:13,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=337, Unknown=4, NotChecked=0, Total=420 [2022-11-16 12:42:13,083 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:42:13,084 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 218 transitions, 3140 flow. Second operand has 21 states, 21 states have (on average 52.76190476190476) internal successors, (1108), 21 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 12:42:13,085 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:42:13,085 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:42:13,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:42:16,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:42:17,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:42:18,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:42:19,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:42:20,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:42:27,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:42:29,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:42:42,682 INFO L130 PetriNetUnfolder]: 153/621 cut-off events. [2022-11-16 12:42:42,682 INFO L131 PetriNetUnfolder]: For 5585/5585 co-relation queries the response was YES. [2022-11-16 12:42:42,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3580 conditions, 621 events. 153/621 cut-off events. For 5585/5585 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3571 event pairs, 4 based on Foata normal form. 12/629 useless extension candidates. Maximal degree in co-relation 3532. Up to 313 conditions per place. [2022-11-16 12:42:42,690 INFO L137 encePairwiseOnDemand]: 70/81 looper letters, 153 selfloop transitions, 68 changer transitions 0/261 dead transitions. [2022-11-16 12:42:42,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 261 transitions, 4320 flow [2022-11-16 12:42:42,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:42:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 12:42:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1024 transitions. [2022-11-16 12:42:42,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6653671215074723 [2022-11-16 12:42:42,693 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1024 transitions. [2022-11-16 12:42:42,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1024 transitions. [2022-11-16 12:42:42,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:42:42,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1024 transitions. [2022-11-16 12:42:42,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 53.89473684210526) internal successors, (1024), 19 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 12:42:42,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 81.0) internal successors, (1620), 20 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states 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 12:42:42,699 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 81.0) internal successors, (1620), 20 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states 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 12:42:42,699 INFO L175 Difference]: Start difference. First operand has 172 places, 218 transitions, 3140 flow. Second operand 19 states and 1024 transitions. [2022-11-16 12:42:42,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 261 transitions, 4320 flow [2022-11-16 12:42:42,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 261 transitions, 4072 flow, removed 113 selfloop flow, removed 7 redundant places. [2022-11-16 12:42:42,761 INFO L231 Difference]: Finished difference. Result has 185 places, 243 transitions, 3575 flow [2022-11-16 12:42:42,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3575, PETRI_PLACES=185, PETRI_TRANSITIONS=243} [2022-11-16 12:42:42,763 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 114 predicate places. [2022-11-16 12:42:42,763 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 243 transitions, 3575 flow [2022-11-16 12:42:42,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.76190476190476) internal successors, (1108), 21 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 12:42:42,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:42:42,764 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-16 12:42:42,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:42:42,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:42,976 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:42:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:42:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2024898532, now seen corresponding path program 7 times [2022-11-16 12:42:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:42:42,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962702842] [2022-11-16 12:42:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:42:42,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:42:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:42:50,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:42:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962702842] [2022-11-16 12:42:50,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962702842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:42:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015745064] [2022-11-16 12:42:50,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:42:50,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:42:50,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:42:50,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:42:50,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15bc6565-26ad-42f0-b913-30729b29f6c5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:42:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:42:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:42:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:45:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:45:34,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:46:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:46:40,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015745064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:46:40,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:46:40,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 35 [2022-11-16 12:46:40,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595321105] [2022-11-16 12:46:40,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:46:40,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:46:40,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:46:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:46:40,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=995, Unknown=56, NotChecked=0, Total=1190 [2022-11-16 12:46:40,073 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2022-11-16 12:46:40,075 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 243 transitions, 3575 flow. Second operand has 35 states, 35 states have (on average 51.82857142857143) internal successors, (1814), 35 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states 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 12:46:40,075 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:46:40,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2022-11-16 12:46:40,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:46:45,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:46:47,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:47:35,346 WARN L233 SmtUtils]: Spent 34.32s on a formula simplification. DAG size of input: 95 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:47:37,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:48:44,457 WARN L233 SmtUtils]: Spent 57.88s on a formula simplification. DAG size of input: 126 DAG size of output: 85 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:48:46,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:48:48,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:48:50,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:48:52,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:48:54,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:48:56,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:48:58,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:00,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:03,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:05,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:07,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:09,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:49:12,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:50:06,502 WARN L233 SmtUtils]: Spent 39.68s on a formula simplification. DAG size of input: 104 DAG size of output: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:50:08,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:50:10,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:50:12,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:50:15,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:50:18,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:50:25,910 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:51:42,797 WARN L233 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 123 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:51:44,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:46,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:49,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:52,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:55,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:51:57,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:00,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:02,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:04,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:07,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:09,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:11,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-16 12:52:13,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []