./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:03:37,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:03:37,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:03:37,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:03:37,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:03:37,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:03:37,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:03:37,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:03:37,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:03:37,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:03:37,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:03:37,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:03:37,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:03:37,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:03:37,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:03:37,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:03:37,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:03:37,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:03:37,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:03:37,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:03:37,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:03:37,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:03:37,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:03:37,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:03:37,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:03:37,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:03:37,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:03:37,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:03:37,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:03:37,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:03:37,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:03:37,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:03:37,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:03:37,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:03:37,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:03:37,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:03:37,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:03:37,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:03:37,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:03:37,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:03:37,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:03:37,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:03:37,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:03:37,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:03:37,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:03:37,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:03:37,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:03:37,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:03:37,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:03:37,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:03:37,361 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:03:37,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:03:37,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:03:37,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:03:37,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:03:37,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:03:37,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:03:37,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:03:37,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:03:37,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:03:37,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:03:37,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:03:37,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:03:37,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:03:37,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:03:37,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:03:37,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:03:37,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:03:37,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:03:37,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:03:37,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:03:37,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:03:37,368 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:03:37,368 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:03:37,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:03:37,368 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_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83223bd52506e4247e7ac7ce7a49284be0292b773b9e827e6221f58042ba0602 [2022-11-18 20:03:37,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:03:37,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:03:37,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:03:37,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:03:37,724 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:03:37,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2022-11-18 20:03:37,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/data/28626c278/59d4bb8aaba34fa9bc032743f0e97af4/FLAG7ef22a886 [2022-11-18 20:03:38,382 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:03:38,382 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2022-11-18 20:03:38,396 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/data/28626c278/59d4bb8aaba34fa9bc032743f0e97af4/FLAG7ef22a886 [2022-11-18 20:03:38,708 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/data/28626c278/59d4bb8aaba34fa9bc032743f0e97af4 [2022-11-18 20:03:38,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:03:38,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:03:38,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:03:38,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:03:38,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:03:38,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:03:38" (1/1) ... [2022-11-18 20:03:38,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4048151a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:38, skipping insertion in model container [2022-11-18 20:03:38,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:03:38" (1/1) ... [2022-11-18 20:03:38,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:03:38,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:03:39,011 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2022-11-18 20:03:39,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:03:39,042 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:03:39,077 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4836,4849] [2022-11-18 20:03:39,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:03:39,101 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:03:39,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39 WrapperNode [2022-11-18 20:03:39,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:03:39,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:03:39,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:03:39,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:03:39,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,153 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 297 [2022-11-18 20:03:39,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:03:39,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:03:39,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:03:39,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:03:39,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,214 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:03:39,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:03:39,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:03:39,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:03:39,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (1/1) ... [2022-11-18 20:03:39,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:03:39,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:03:39,272 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:03:39,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:03:39,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:03:39,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:03:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:03:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:03:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:03:39,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:03:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:03:39,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:03:39,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 20:03:39,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 20:03:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:03:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:03:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:03:39,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:03:39,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:03:39,319 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:03:39,474 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:03:39,476 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:03:40,129 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:03:40,143 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:03:40,144 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 20:03:40,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:03:40 BoogieIcfgContainer [2022-11-18 20:03:40,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:03:40,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:03:40,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:03:40,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:03:40,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:03:38" (1/3) ... [2022-11-18 20:03:40,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d036f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:03:40, skipping insertion in model container [2022-11-18 20:03:40,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:03:39" (2/3) ... [2022-11-18 20:03:40,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d036f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:03:40, skipping insertion in model container [2022-11-18 20:03:40,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:03:40" (3/3) ... [2022-11-18 20:03:40,167 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2022-11-18 20:03:40,177 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:03:40,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:03:40,188 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:03:40,188 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:03:40,365 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:03:40,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 359 places, 375 transitions, 774 flow [2022-11-18 20:03:40,646 INFO L130 PetriNetUnfolder]: 26/372 cut-off events. [2022-11-18 20:03:40,646 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:03:40,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 372 events. 26/372 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 882 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2022-11-18 20:03:40,660 INFO L82 GeneralOperation]: Start removeDead. Operand has 359 places, 375 transitions, 774 flow [2022-11-18 20:03:40,670 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 361 transitions, 740 flow [2022-11-18 20:03:40,685 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:03:40,696 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;@5ee49f54, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:03:40,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-18 20:03:40,819 INFO L130 PetriNetUnfolder]: 26/360 cut-off events. [2022-11-18 20:03:40,819 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:03:40,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:03:40,820 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:40,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:03:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:40,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1119500786, now seen corresponding path program 1 times [2022-11-18 20:03:40,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:03:40,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161873666] [2022-11-18 20:03:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:40,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:03:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:41,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:03:41,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161873666] [2022-11-18 20:03:41,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161873666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:03:41,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:03:41,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:03:41,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767473340] [2022-11-18 20:03:41,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:03:41,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:03:41,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:03:41,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:03:41,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:03:41,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 375 [2022-11-18 20:03:41,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 361 transitions, 740 flow. Second operand has 2 states, 2 states have (on average 354.0) internal successors, (708), 2 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:41,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:03:41,306 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 375 [2022-11-18 20:03:41,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:03:41,416 INFO L130 PetriNetUnfolder]: 7/342 cut-off events. [2022-11-18 20:03:41,417 INFO L131 PetriNetUnfolder]: For 14/16 co-relation queries the response was YES. [2022-11-18 20:03:41,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 342 events. 7/342 cut-off events. For 14/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 845 event pairs, 0 based on Foata normal form. 36/356 useless extension candidates. Maximal degree in co-relation 263. Up to 7 conditions per place. [2022-11-18 20:03:41,425 INFO L137 encePairwiseOnDemand]: 356/375 looper letters, 6 selfloop transitions, 0 changer transitions 3/342 dead transitions. [2022-11-18 20:03:41,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 342 transitions, 714 flow [2022-11-18 20:03:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:03:41,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:03:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 723 transitions. [2022-11-18 20:03:41,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.964 [2022-11-18 20:03:41,454 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 723 transitions. [2022-11-18 20:03:41,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 723 transitions. [2022-11-18 20:03:41,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:03:41,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 723 transitions. [2022-11-18 20:03:41,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 361.5) internal successors, (723), 2 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:41,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:41,480 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:41,482 INFO L175 Difference]: Start difference. First operand has 345 places, 361 transitions, 740 flow. Second operand 2 states and 723 transitions. [2022-11-18 20:03:41,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 342 transitions, 714 flow [2022-11-18 20:03:41,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 342 transitions, 702 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 20:03:41,495 INFO L231 Difference]: Finished difference. Result has 340 places, 339 transitions, 684 flow [2022-11-18 20:03:41,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=684, PETRI_PLACES=340, PETRI_TRANSITIONS=339} [2022-11-18 20:03:41,503 INFO L288 CegarLoopForPetriNet]: 345 programPoint places, -5 predicate places. [2022-11-18 20:03:41,504 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 339 transitions, 684 flow [2022-11-18 20:03:41,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 354.0) internal successors, (708), 2 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:41,505 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:03:41,505 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:41,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:03:41,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:03:41,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1914866916, now seen corresponding path program 1 times [2022-11-18 20:03:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:03:41,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659303713] [2022-11-18 20:03:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:41,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:03:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:42,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:03:42,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659303713] [2022-11-18 20:03:42,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659303713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:03:42,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:03:42,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:03:42,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072114412] [2022-11-18 20:03:42,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:03:42,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:03:42,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:03:42,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:03:42,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:03:42,042 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 375 [2022-11-18 20:03:42,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 339 transitions, 684 flow. Second operand has 5 states, 5 states have (on average 339.8) internal successors, (1699), 5 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:42,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:03:42,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 375 [2022-11-18 20:03:42,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:03:42,199 INFO L130 PetriNetUnfolder]: 7/345 cut-off events. [2022-11-18 20:03:42,199 INFO L131 PetriNetUnfolder]: For 3/5 co-relation queries the response was YES. [2022-11-18 20:03:42,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 345 events. 7/345 cut-off events. For 3/5 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 841 event pairs, 0 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 370. Up to 16 conditions per place. [2022-11-18 20:03:42,204 INFO L137 encePairwiseOnDemand]: 370/375 looper letters, 18 selfloop transitions, 4 changer transitions 0/343 dead transitions. [2022-11-18 20:03:42,205 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 343 transitions, 736 flow [2022-11-18 20:03:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:03:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:03:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1708 transitions. [2022-11-18 20:03:42,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9109333333333334 [2022-11-18 20:03:42,211 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1708 transitions. [2022-11-18 20:03:42,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1708 transitions. [2022-11-18 20:03:42,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:03:42,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1708 transitions. [2022-11-18 20:03:42,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 341.6) internal successors, (1708), 5 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:42,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:42,224 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 375.0) internal successors, (2250), 6 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:42,224 INFO L175 Difference]: Start difference. First operand has 340 places, 339 transitions, 684 flow. Second operand 5 states and 1708 transitions. [2022-11-18 20:03:42,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 343 transitions, 736 flow [2022-11-18 20:03:42,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 343 transitions, 736 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:03:42,234 INFO L231 Difference]: Finished difference. Result has 342 places, 340 transitions, 700 flow [2022-11-18 20:03:42,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=700, PETRI_PLACES=342, PETRI_TRANSITIONS=340} [2022-11-18 20:03:42,236 INFO L288 CegarLoopForPetriNet]: 345 programPoint places, -3 predicate places. [2022-11-18 20:03:42,236 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 340 transitions, 700 flow [2022-11-18 20:03:42,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 339.8) internal successors, (1699), 5 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:42,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:03:42,238 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:42,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:03:42,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:03:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:42,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1502566695, now seen corresponding path program 1 times [2022-11-18 20:03:42,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:03:42,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972990530] [2022-11-18 20:03:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:03:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:42,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:03:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972990530] [2022-11-18 20:03:42,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972990530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:03:42,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779872649] [2022-11-18 20:03:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:42,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:03:42,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:03:42,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:03:42,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:03:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:42,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:03:42,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:03:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:43,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:03:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:03:43,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779872649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:03:43,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:03:43,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-18 20:03:43,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477676149] [2022-11-18 20:03:43,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:03:43,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:03:43,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:03:43,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:03:43,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:03:43,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 375 [2022-11-18 20:03:43,172 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 340 transitions, 700 flow. Second operand has 14 states, 14 states have (on average 338.7857142857143) internal successors, (4743), 14 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:43,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:03:43,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 375 [2022-11-18 20:03:43,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:03:43,470 INFO L130 PetriNetUnfolder]: 7/354 cut-off events. [2022-11-18 20:03:43,470 INFO L131 PetriNetUnfolder]: For 7/9 co-relation queries the response was YES. [2022-11-18 20:03:43,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 354 events. 7/354 cut-off events. For 7/9 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 839 event pairs, 0 based on Foata normal form. 2/338 useless extension candidates. Maximal degree in co-relation 395. Up to 13 conditions per place. [2022-11-18 20:03:43,476 INFO L137 encePairwiseOnDemand]: 367/375 looper letters, 19 selfloop transitions, 11 changer transitions 0/350 dead transitions. [2022-11-18 20:03:43,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 350 transitions, 782 flow [2022-11-18 20:03:43,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:03:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-18 20:03:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 3728 transitions. [2022-11-18 20:03:43,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9037575757575758 [2022-11-18 20:03:43,484 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 3728 transitions. [2022-11-18 20:03:43,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 3728 transitions. [2022-11-18 20:03:43,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:03:43,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 3728 transitions. [2022-11-18 20:03:43,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 338.90909090909093) internal successors, (3728), 11 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:43,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:43,506 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 375.0) internal successors, (4500), 12 states have internal predecessors, (4500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:43,506 INFO L175 Difference]: Start difference. First operand has 342 places, 340 transitions, 700 flow. Second operand 11 states and 3728 transitions. [2022-11-18 20:03:43,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 350 transitions, 782 flow [2022-11-18 20:03:43,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 350 transitions, 776 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 20:03:43,514 INFO L231 Difference]: Finished difference. Result has 352 places, 346 transitions, 749 flow [2022-11-18 20:03:43,514 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=749, PETRI_PLACES=352, PETRI_TRANSITIONS=346} [2022-11-18 20:03:43,517 INFO L288 CegarLoopForPetriNet]: 345 programPoint places, 7 predicate places. [2022-11-18 20:03:43,517 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 346 transitions, 749 flow [2022-11-18 20:03:43,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 338.7857142857143) internal successors, (4743), 14 states have internal predecessors, (4743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:43,521 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:03:43,521 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:43,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:03:43,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8aed804-f568-4e2a-bbed-861a26a1a660/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:03:43,727 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:03:43,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1397789449, now seen corresponding path program 2 times [2022-11-18 20:03:43,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:03:43,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224699907] [2022-11-18 20:03:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:43,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:03:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:03:44,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:03:44,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224699907] [2022-11-18 20:03:44,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224699907] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:03:44,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:03:44,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 20:03:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022938721] [2022-11-18 20:03:44,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:03:44,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:03:44,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:03:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:03:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:03:44,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 375 [2022-11-18 20:03:44,981 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 346 transitions, 749 flow. Second operand has 14 states, 14 states have (on average 284.57142857142856) internal successors, (3984), 14 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:44,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:03:44,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 375 [2022-11-18 20:03:44,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:03:52,426 INFO L130 PetriNetUnfolder]: 9365/31795 cut-off events. [2022-11-18 20:03:52,427 INFO L131 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2022-11-18 20:03:52,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46314 conditions, 31795 events. 9365/31795 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 1180. Compared 417815 event pairs, 2932 based on Foata normal form. 1/28878 useless extension candidates. Maximal degree in co-relation 46306. Up to 4898 conditions per place. [2022-11-18 20:03:52,860 INFO L137 encePairwiseOnDemand]: 349/375 looper letters, 309 selfloop transitions, 45 changer transitions 10/639 dead transitions. [2022-11-18 20:03:52,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 639 transitions, 2094 flow [2022-11-18 20:03:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:03:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:03:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6266 transitions. [2022-11-18 20:03:52,882 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7956825396825397 [2022-11-18 20:03:52,882 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6266 transitions. [2022-11-18 20:03:52,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6266 transitions. [2022-11-18 20:03:52,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:03:52,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6266 transitions. [2022-11-18 20:03:52,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 298.3809523809524) internal successors, (6266), 21 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:52,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 375.0) internal successors, (8250), 22 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:52,924 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 375.0) internal successors, (8250), 22 states have internal predecessors, (8250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:52,924 INFO L175 Difference]: Start difference. First operand has 352 places, 346 transitions, 749 flow. Second operand 21 states and 6266 transitions. [2022-11-18 20:03:52,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 639 transitions, 2094 flow [2022-11-18 20:03:52,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 639 transitions, 2085 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-18 20:03:52,941 INFO L231 Difference]: Finished difference. Result has 385 places, 383 transitions, 1037 flow [2022-11-18 20:03:52,942 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1037, PETRI_PLACES=385, PETRI_TRANSITIONS=383} [2022-11-18 20:03:52,943 INFO L288 CegarLoopForPetriNet]: 345 programPoint places, 40 predicate places. [2022-11-18 20:03:52,944 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 383 transitions, 1037 flow [2022-11-18 20:03:52,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 284.57142857142856) internal successors, (3984), 14 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:52,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:03:52,962 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:03:52,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:03:52,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:03:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:03:52,964 INFO L85 PathProgramCache]: Analyzing trace with hash -834579059, now seen corresponding path program 3 times [2022-11-18 20:03:52,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:03:52,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928163788] [2022-11-18 20:03:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:03:52,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:03:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:03:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:03:54,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:03:54,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928163788] [2022-11-18 20:03:54,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928163788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:03:54,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:03:54,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 20:03:54,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200965355] [2022-11-18 20:03:54,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:03:54,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:03:54,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:03:54,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:03:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:03:54,197 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 375 [2022-11-18 20:03:54,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 383 transitions, 1037 flow. Second operand has 14 states, 14 states have (on average 284.57142857142856) internal successors, (3984), 14 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:03:54,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:03:54,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 375 [2022-11-18 20:03:54,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:04:06,078 INFO L130 PetriNetUnfolder]: 16781/57110 cut-off events. [2022-11-18 20:04:06,078 INFO L131 PetriNetUnfolder]: For 23126/23172 co-relation queries the response was YES. [2022-11-18 20:04:06,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103246 conditions, 57110 events. 16781/57110 cut-off events. For 23126/23172 co-relation queries the response was YES. Maximal size of possible extension queue 1800. Compared 805281 event pairs, 5377 based on Foata normal form. 1/52953 useless extension candidates. Maximal degree in co-relation 103222. Up to 8906 conditions per place. [2022-11-18 20:04:06,677 INFO L137 encePairwiseOnDemand]: 346/375 looper letters, 357 selfloop transitions, 72 changer transitions 10/714 dead transitions. [2022-11-18 20:04:06,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 714 transitions, 3044 flow [2022-11-18 20:04:06,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:04:06,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-18 20:04:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6825 transitions. [2022-11-18 20:04:06,693 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7913043478260869 [2022-11-18 20:04:06,693 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6825 transitions. [2022-11-18 20:04:06,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6825 transitions. [2022-11-18 20:04:06,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:04:06,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6825 transitions. [2022-11-18 20:04:06,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 296.7391304347826) internal successors, (6825), 23 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:06,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 375.0) internal successors, (9000), 24 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:06,730 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 375.0) internal successors, (9000), 24 states have internal predecessors, (9000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:06,730 INFO L175 Difference]: Start difference. First operand has 385 places, 383 transitions, 1037 flow. Second operand 23 states and 6825 transitions. [2022-11-18 20:04:06,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 714 transitions, 3044 flow [2022-11-18 20:04:07,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 714 transitions, 3022 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-18 20:04:07,268 INFO L231 Difference]: Finished difference. Result has 417 places, 424 transitions, 1582 flow [2022-11-18 20:04:07,268 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1582, PETRI_PLACES=417, PETRI_TRANSITIONS=424} [2022-11-18 20:04:07,269 INFO L288 CegarLoopForPetriNet]: 345 programPoint places, 72 predicate places. [2022-11-18 20:04:07,269 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 424 transitions, 1582 flow [2022-11-18 20:04:07,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 284.57142857142856) internal successors, (3984), 14 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:07,271 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:04:07,271 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:04:07,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:04:07,272 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:04:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:04:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash 184182641, now seen corresponding path program 4 times [2022-11-18 20:04:07,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:04:07,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591413778] [2022-11-18 20:04:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:04:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:04:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:04:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:04:08,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:04:08,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591413778] [2022-11-18 20:04:08,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591413778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:04:08,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:04:08,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 20:04:08,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311133048] [2022-11-18 20:04:08,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:04:08,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:04:08,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:04:08,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:04:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:04:08,217 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 375 [2022-11-18 20:04:08,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 424 transitions, 1582 flow. Second operand has 14 states, 14 states have (on average 284.57142857142856) internal successors, (3984), 14 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:08,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:04:08,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 375 [2022-11-18 20:04:08,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:04:26,254 INFO L130 PetriNetUnfolder]: 23245/80893 cut-off events. [2022-11-18 20:04:26,254 INFO L131 PetriNetUnfolder]: For 89492/89765 co-relation queries the response was YES. [2022-11-18 20:04:26,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166243 conditions, 80893 events. 23245/80893 cut-off events. For 89492/89765 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 1207997 event pairs, 6538 based on Foata normal form. 17/74757 useless extension candidates. Maximal degree in co-relation 166204. Up to 11736 conditions per place. [2022-11-18 20:04:27,335 INFO L137 encePairwiseOnDemand]: 349/375 looper letters, 489 selfloop transitions, 128 changer transitions 8/900 dead transitions. [2022-11-18 20:04:27,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 900 transitions, 5195 flow [2022-11-18 20:04:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:04:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:04:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 7518 transitions. [2022-11-18 20:04:27,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.80192 [2022-11-18 20:04:27,355 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 7518 transitions. [2022-11-18 20:04:27,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 7518 transitions. [2022-11-18 20:04:27,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:04:27,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 7518 transitions. [2022-11-18 20:04:27,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 300.72) internal successors, (7518), 25 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:27,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 375.0) internal successors, (9750), 26 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:27,402 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 375.0) internal successors, (9750), 26 states have internal predecessors, (9750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:27,402 INFO L175 Difference]: Start difference. First operand has 417 places, 424 transitions, 1582 flow. Second operand 25 states and 7518 transitions. [2022-11-18 20:04:27,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 900 transitions, 5195 flow [2022-11-18 20:04:28,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 900 transitions, 4981 flow, removed 103 selfloop flow, removed 6 redundant places. [2022-11-18 20:04:28,987 INFO L231 Difference]: Finished difference. Result has 454 places, 533 transitions, 3097 flow [2022-11-18 20:04:28,988 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=375, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3097, PETRI_PLACES=454, PETRI_TRANSITIONS=533} [2022-11-18 20:04:28,988 INFO L288 CegarLoopForPetriNet]: 345 programPoint places, 109 predicate places. [2022-11-18 20:04:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 533 transitions, 3097 flow [2022-11-18 20:04:28,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 284.57142857142856) internal successors, (3984), 14 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:28,990 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:04:28,991 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:04:28,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:04:28,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-18 20:04:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:04:28,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1119211843, now seen corresponding path program 5 times [2022-11-18 20:04:28,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:04:28,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678139345] [2022-11-18 20:04:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:04:28,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:04:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:04:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:04:30,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:04:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678139345] [2022-11-18 20:04:30,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678139345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:04:30,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:04:30,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-18 20:04:30,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404901619] [2022-11-18 20:04:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:04:30,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:04:30,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:04:30,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:04:30,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:04:30,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 375 [2022-11-18 20:04:30,094 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 533 transitions, 3097 flow. Second operand has 14 states, 14 states have (on average 284.57142857142856) internal successors, (3984), 14 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:04:30,094 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:04:30,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 375 [2022-11-18 20:04:30,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand