./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN --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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- 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-6b4ec56 [2022-11-20 11:04:53,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:04:53,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:04:53,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:04:53,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:04:53,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:04:53,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:04:53,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:04:53,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:04:53,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:04:53,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:04:53,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:04:53,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:04:53,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:04:53,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:04:53,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:04:53,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:04:53,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:04:53,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:04:53,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:04:53,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:04:53,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:04:53,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:04:53,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:04:53,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:04:53,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:04:53,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:04:53,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:04:53,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:04:53,678 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:04:53,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:04:53,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:04:53,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:04:53,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:04:53,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:04:53,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:04:53,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:04:53,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:04:53,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:04:53,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:04:53,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:04:53,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:04:53,734 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:04:53,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:04:53,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:04:53,736 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:04:53,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:04:53,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:04:53,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:04:53,738 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:04:53,738 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:04:53,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:04:53,739 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:04:53,739 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:04:53,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:04:53,740 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:04:53,740 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:04:53,740 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:04:53,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:04:53,741 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:04:53,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:04:53,741 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:04:53,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:04:53,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:04:53,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:04:53,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:04:53,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:53,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:04:53,743 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:04:53,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:04:53,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:04:53,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:04:53,744 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:04:53,744 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:04:53,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:04:53,745 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_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2022-11-20 11:04:54,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:04:54,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:04:54,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:04:54,053 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:04:54,053 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:04:54,054 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-20 11:04:57,295 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:04:57,653 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:04:57,653 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-20 11:04:57,680 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/data/efb4d07be/4bd7c6caf0494e3d965d3a56971f3c72/FLAG6f00b6924 [2022-11-20 11:04:57,696 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/data/efb4d07be/4bd7c6caf0494e3d965d3a56971f3c72 [2022-11-20 11:04:57,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:04:57,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:04:57,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:57,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:04:57,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:04:57,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:57" (1/1) ... [2022-11-20 11:04:57,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3466f2e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:57, skipping insertion in model container [2022-11-20 11:04:57,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:04:57" (1/1) ... [2022-11-20 11:04:57,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:04:57,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:04:58,356 WARN L237 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_2d3a4ff9-df58-42a4-9915-bec7e5584585/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-20 11:04:58,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:58,427 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:04:58,464 WARN L237 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_2d3a4ff9-df58-42a4-9915-bec7e5584585/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-20 11:04:58,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:04:58,541 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:04:58,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58 WrapperNode [2022-11-20 11:04:58,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:04:58,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:04:58,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:04:58,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:04:58,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,598 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-11-20 11:04:58,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:04:58,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:04:58,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:04:58,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:04:58,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,634 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:04:58,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:04:58,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:04:58,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:04:58,647 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (1/1) ... [2022-11-20 11:04:58,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:04:58,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:04:58,687 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:04:58,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:04:58,731 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 11:04:58,731 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 11:04:58,732 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 11:04:58,732 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 11:04:58,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:04:58,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:04:58,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:04:58,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:04:58,736 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:04:58,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:04:58,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:04:58,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:04:58,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:04:58,739 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:04:58,970 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:04:58,973 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:04:59,454 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:04:59,465 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:04:59,465 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 11:04:59,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:59 BoogieIcfgContainer [2022-11-20 11:04:59,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:04:59,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:04:59,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:04:59,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:04:59,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:04:57" (1/3) ... [2022-11-20 11:04:59,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e43845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:04:59, skipping insertion in model container [2022-11-20 11:04:59,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:04:58" (2/3) ... [2022-11-20 11:04:59,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e43845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:04:59, skipping insertion in model container [2022-11-20 11:04:59,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:59" (3/3) ... [2022-11-20 11:04:59,479 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2022-11-20 11:04:59,488 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:04:59,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:04:59,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 11:04:59,498 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:04:59,667 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:04:59,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 179 transitions, 374 flow [2022-11-20 11:04:59,815 INFO L130 PetriNetUnfolder]: 10/177 cut-off events. [2022-11-20 11:04:59,815 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:04:59,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 10/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 432 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 135. Up to 3 conditions per place. [2022-11-20 11:04:59,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 179 transitions, 374 flow [2022-11-20 11:04:59,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 167 transitions, 343 flow [2022-11-20 11:04:59,842 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:04:59,849 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;@614f70ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:04:59,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 11:04:59,891 INFO L130 PetriNetUnfolder]: 4/130 cut-off events. [2022-11-20 11:04:59,892 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 11:04:59,892 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:04:59,893 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] [2022-11-20 11:04:59,893 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:04:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:04:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash 979447583, now seen corresponding path program 1 times [2022-11-20 11:04:59,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:04:59,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293518198] [2022-11-20 11:04:59,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:04:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:00,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:00,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293518198] [2022-11-20 11:05:00,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293518198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:00,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:00,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:00,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652982840] [2022-11-20 11:05:00,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:00,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:00,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:00,465 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 179 [2022-11-20 11:05:00,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 167 transitions, 343 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:00,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:00,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 179 [2022-11-20 11:05:00,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:00,803 INFO L130 PetriNetUnfolder]: 91/890 cut-off events. [2022-11-20 11:05:00,803 INFO L131 PetriNetUnfolder]: For 46/46 co-relation queries the response was YES. [2022-11-20 11:05:00,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052 conditions, 890 events. 91/890 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 5311 event pairs, 15 based on Foata normal form. 61/878 useless extension candidates. Maximal degree in co-relation 903. Up to 96 conditions per place. [2022-11-20 11:05:00,813 INFO L137 encePairwiseOnDemand]: 170/179 looper letters, 19 selfloop transitions, 3 changer transitions 0/167 dead transitions. [2022-11-20 11:05:00,814 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 167 transitions, 393 flow [2022-11-20 11:05:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2022-11-20 11:05:00,835 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9422718808193669 [2022-11-20 11:05:00,836 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2022-11-20 11:05:00,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2022-11-20 11:05:00,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:00,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2022-11-20 11:05:00,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:00,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:00,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:00,856 INFO L175 Difference]: Start difference. First operand has 164 places, 167 transitions, 343 flow. Second operand 3 states and 506 transitions. [2022-11-20 11:05:00,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 167 transitions, 393 flow [2022-11-20 11:05:00,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 167 transitions, 385 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 11:05:00,865 INFO L231 Difference]: Finished difference. Result has 160 places, 160 transitions, 339 flow [2022-11-20 11:05:00,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=160, PETRI_TRANSITIONS=160} [2022-11-20 11:05:00,877 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -4 predicate places. [2022-11-20 11:05:00,880 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 160 transitions, 339 flow [2022-11-20 11:05:00,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:00,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:00,882 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] [2022-11-20 11:05:00,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:05:00,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:00,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1987843322, now seen corresponding path program 1 times [2022-11-20 11:05:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:00,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537504344] [2022-11-20 11:05:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537504344] [2022-11-20 11:05:01,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537504344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:01,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:01,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:01,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111806802] [2022-11-20 11:05:01,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:01,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:01,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:01,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:01,147 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 179 [2022-11-20 11:05:01,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 160 transitions, 339 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:01,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 179 [2022-11-20 11:05:01,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:01,254 INFO L130 PetriNetUnfolder]: 21/419 cut-off events. [2022-11-20 11:05:01,254 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 11:05:01,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 419 events. 21/419 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1375 event pairs, 4 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 376. Up to 16 conditions per place. [2022-11-20 11:05:01,258 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 9 selfloop transitions, 2 changer transitions 0/163 dead transitions. [2022-11-20 11:05:01,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 163 transitions, 367 flow [2022-11-20 11:05:01,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2022-11-20 11:05:01,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9385474860335196 [2022-11-20 11:05:01,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2022-11-20 11:05:01,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2022-11-20 11:05:01,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:01,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2022-11-20 11:05:01,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,267 INFO L175 Difference]: Start difference. First operand has 160 places, 160 transitions, 339 flow. Second operand 3 states and 504 transitions. [2022-11-20 11:05:01,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 163 transitions, 367 flow [2022-11-20 11:05:01,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 163 transitions, 365 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:01,272 INFO L231 Difference]: Finished difference. Result has 162 places, 160 transitions, 344 flow [2022-11-20 11:05:01,273 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=162, PETRI_TRANSITIONS=160} [2022-11-20 11:05:01,274 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, -2 predicate places. [2022-11-20 11:05:01,274 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 160 transitions, 344 flow [2022-11-20 11:05:01,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,275 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:01,275 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:01,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:05:01,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash 69346619, now seen corresponding path program 1 times [2022-11-20 11:05:01,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:01,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36116017] [2022-11-20 11:05:01,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:01,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:01,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:01,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36116017] [2022-11-20 11:05:01,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36116017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:01,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:01,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:05:01,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963633393] [2022-11-20 11:05:01,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:01,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:05:01,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:05:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:05:01,486 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 179 [2022-11-20 11:05:01,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 160 transitions, 344 flow. Second operand has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:01,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 179 [2022-11-20 11:05:01,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:01,662 INFO L130 PetriNetUnfolder]: 41/516 cut-off events. [2022-11-20 11:05:01,662 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 11:05:01,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 516 events. 41/516 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2040 event pairs, 13 based on Foata normal form. 0/485 useless extension candidates. Maximal degree in co-relation 403. Up to 37 conditions per place. [2022-11-20 11:05:01,667 INFO L137 encePairwiseOnDemand]: 174/179 looper letters, 16 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2022-11-20 11:05:01,667 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 168 transitions, 405 flow [2022-11-20 11:05:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:05:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-20 11:05:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 657 transitions. [2022-11-20 11:05:01,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9175977653631285 [2022-11-20 11:05:01,671 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 657 transitions. [2022-11-20 11:05:01,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 657 transitions. [2022-11-20 11:05:01,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:01,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 657 transitions. [2022-11-20 11:05:01,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,677 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,677 INFO L175 Difference]: Start difference. First operand has 162 places, 160 transitions, 344 flow. Second operand 4 states and 657 transitions. [2022-11-20 11:05:01,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 168 transitions, 405 flow [2022-11-20 11:05:01,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 168 transitions, 403 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:01,685 INFO L231 Difference]: Finished difference. Result has 166 places, 163 transitions, 370 flow [2022-11-20 11:05:01,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=166, PETRI_TRANSITIONS=163} [2022-11-20 11:05:01,691 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 2 predicate places. [2022-11-20 11:05:01,692 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 163 transitions, 370 flow [2022-11-20 11:05:01,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.75) internal successors, (643), 4 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:01,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:01,694 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:01,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:05:01,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1454932865, now seen corresponding path program 1 times [2022-11-20 11:05:01,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:01,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900758010] [2022-11-20 11:05:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:01,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:02,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:02,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900758010] [2022-11-20 11:05:02,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900758010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:05:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958937613] [2022-11-20 11:05:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:02,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:05:02,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:05:02,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:05:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:02,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:05:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:05:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:02,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:05:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:02,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958937613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:05:02,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:05:02,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-20 11:05:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528075804] [2022-11-20 11:05:02,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:05:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:05:02,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:05:02,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:05:02,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 179 [2022-11-20 11:05:02,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 163 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:02,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:02,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 179 [2022-11-20 11:05:02,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:03,341 INFO L130 PetriNetUnfolder]: 177/1703 cut-off events. [2022-11-20 11:05:03,342 INFO L131 PetriNetUnfolder]: For 83/83 co-relation queries the response was YES. [2022-11-20 11:05:03,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2264 conditions, 1703 events. 177/1703 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 11095 event pairs, 28 based on Foata normal form. 9/1617 useless extension candidates. Maximal degree in co-relation 1786. Up to 135 conditions per place. [2022-11-20 11:05:03,362 INFO L137 encePairwiseOnDemand]: 173/179 looper letters, 48 selfloop transitions, 14 changer transitions 0/209 dead transitions. [2022-11-20 11:05:03,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 209 transitions, 619 flow [2022-11-20 11:05:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:05:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-20 11:05:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1624 transitions. [2022-11-20 11:05:03,369 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9072625698324023 [2022-11-20 11:05:03,370 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1624 transitions. [2022-11-20 11:05:03,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1624 transitions. [2022-11-20 11:05:03,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:03,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1624 transitions. [2022-11-20 11:05:03,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 162.4) internal successors, (1624), 10 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:03,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:03,390 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 179.0) internal successors, (1969), 11 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:03,390 INFO L175 Difference]: Start difference. First operand has 166 places, 163 transitions, 370 flow. Second operand 10 states and 1624 transitions. [2022-11-20 11:05:03,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 209 transitions, 619 flow [2022-11-20 11:05:03,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 209 transitions, 617 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:03,402 INFO L231 Difference]: Finished difference. Result has 177 places, 176 transitions, 462 flow [2022-11-20 11:05:03,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=462, PETRI_PLACES=177, PETRI_TRANSITIONS=176} [2022-11-20 11:05:03,405 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 13 predicate places. [2022-11-20 11:05:03,405 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 176 transitions, 462 flow [2022-11-20 11:05:03,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 158.5) internal successors, (1585), 10 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:03,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:03,408 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] [2022-11-20 11:05:03,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:05:03,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:05:03,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1825277643, now seen corresponding path program 1 times [2022-11-20 11:05:03,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529548839] [2022-11-20 11:05:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:03,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:03,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529548839] [2022-11-20 11:05:03,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529548839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:03,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:03,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:05:03,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316955560] [2022-11-20 11:05:03,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:03,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:05:03,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:03,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:05:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:05:03,782 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 179 [2022-11-20 11:05:03,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 176 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:03,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:03,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 179 [2022-11-20 11:05:03,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:04,054 INFO L130 PetriNetUnfolder]: 50/1065 cut-off events. [2022-11-20 11:05:04,054 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-20 11:05:04,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 1065 events. 50/1065 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 4611 event pairs, 10 based on Foata normal form. 12/1031 useless extension candidates. Maximal degree in co-relation 998. Up to 46 conditions per place. [2022-11-20 11:05:04,062 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 12 selfloop transitions, 4 changer transitions 0/173 dead transitions. [2022-11-20 11:05:04,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 173 transitions, 473 flow [2022-11-20 11:05:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:05:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:05:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2022-11-20 11:05:04,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9106145251396648 [2022-11-20 11:05:04,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2022-11-20 11:05:04,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2022-11-20 11:05:04,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:04,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2022-11-20 11:05:04,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,072 INFO L175 Difference]: Start difference. First operand has 177 places, 176 transitions, 462 flow. Second operand 3 states and 489 transitions. [2022-11-20 11:05:04,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 173 transitions, 473 flow [2022-11-20 11:05:04,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 173 transitions, 461 flow, removed 5 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:04,082 INFO L231 Difference]: Finished difference. Result has 177 places, 171 transitions, 430 flow [2022-11-20 11:05:04,083 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=177, PETRI_TRANSITIONS=171} [2022-11-20 11:05:04,086 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 13 predicate places. [2022-11-20 11:05:04,086 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 171 transitions, 430 flow [2022-11-20 11:05:04,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,087 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:04,087 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] [2022-11-20 11:05:04,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:05:04,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:04,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1732705704, now seen corresponding path program 1 times [2022-11-20 11:05:04,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:04,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409645030] [2022-11-20 11:05:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:04,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:04,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:04,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409645030] [2022-11-20 11:05:04,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409645030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:04,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:04,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:05:04,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286658970] [2022-11-20 11:05:04,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:04,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:05:04,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:04,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:05:04,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:05:04,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 179 [2022-11-20 11:05:04,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 171 transitions, 430 flow. Second operand has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,325 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:04,325 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 179 [2022-11-20 11:05:04,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:04,769 INFO L130 PetriNetUnfolder]: 116/1219 cut-off events. [2022-11-20 11:05:04,769 INFO L131 PetriNetUnfolder]: For 131/131 co-relation queries the response was YES. [2022-11-20 11:05:04,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1823 conditions, 1219 events. 116/1219 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6018 event pairs, 19 based on Foata normal form. 0/1167 useless extension candidates. Maximal degree in co-relation 1103. Up to 178 conditions per place. [2022-11-20 11:05:04,776 INFO L137 encePairwiseOnDemand]: 168/179 looper letters, 49 selfloop transitions, 13 changer transitions 0/199 dead transitions. [2022-11-20 11:05:04,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 199 transitions, 639 flow [2022-11-20 11:05:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:05:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-20 11:05:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1371 transitions. [2022-11-20 11:05:04,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.851024208566108 [2022-11-20 11:05:04,782 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1371 transitions. [2022-11-20 11:05:04,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1371 transitions. [2022-11-20 11:05:04,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:04,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1371 transitions. [2022-11-20 11:05:04,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.33333333333334) internal successors, (1371), 9 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,792 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 179.0) internal successors, (1790), 10 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,792 INFO L175 Difference]: Start difference. First operand has 177 places, 171 transitions, 430 flow. Second operand 9 states and 1371 transitions. [2022-11-20 11:05:04,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 199 transitions, 639 flow [2022-11-20 11:05:04,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 199 transitions, 635 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 11:05:04,799 INFO L231 Difference]: Finished difference. Result has 189 places, 178 transitions, 514 flow [2022-11-20 11:05:04,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=514, PETRI_PLACES=189, PETRI_TRANSITIONS=178} [2022-11-20 11:05:04,802 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 25 predicate places. [2022-11-20 11:05:04,803 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 178 transitions, 514 flow [2022-11-20 11:05:04,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.28571428571428) internal successors, (1038), 7 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:04,810 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:04,811 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] [2022-11-20 11:05:04,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:05:04,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:04,813 INFO L85 PathProgramCache]: Analyzing trace with hash 274613282, now seen corresponding path program 1 times [2022-11-20 11:05:04,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:04,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936002119] [2022-11-20 11:05:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:04,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:07,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:07,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936002119] [2022-11-20 11:05:07,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936002119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:07,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:07,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-20 11:05:07,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461470156] [2022-11-20 11:05:07,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:07,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:05:07,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:07,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:05:07,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:05:07,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 179 [2022-11-20 11:05:07,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 178 transitions, 514 flow. Second operand has 24 states, 24 states have (on average 107.41666666666667) internal successors, (2578), 24 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:07,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:07,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 179 [2022-11-20 11:05:07,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:10,562 INFO L130 PetriNetUnfolder]: 1008/3988 cut-off events. [2022-11-20 11:05:10,563 INFO L131 PetriNetUnfolder]: For 554/554 co-relation queries the response was YES. [2022-11-20 11:05:10,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7445 conditions, 3988 events. 1008/3988 cut-off events. For 554/554 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 28676 event pairs, 174 based on Foata normal form. 0/3864 useless extension candidates. Maximal degree in co-relation 4391. Up to 1516 conditions per place. [2022-11-20 11:05:10,592 INFO L137 encePairwiseOnDemand]: 145/179 looper letters, 229 selfloop transitions, 42 changer transitions 4/372 dead transitions. [2022-11-20 11:05:10,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 372 transitions, 1586 flow [2022-11-20 11:05:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 11:05:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-20 11:05:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3515 transitions. [2022-11-20 11:05:10,603 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6334474680122545 [2022-11-20 11:05:10,603 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3515 transitions. [2022-11-20 11:05:10,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3515 transitions. [2022-11-20 11:05:10,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:10,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3515 transitions. [2022-11-20 11:05:10,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 113.38709677419355) internal successors, (3515), 31 states have internal predecessors, (3515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,633 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,633 INFO L175 Difference]: Start difference. First operand has 189 places, 178 transitions, 514 flow. Second operand 31 states and 3515 transitions. [2022-11-20 11:05:10,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 372 transitions, 1586 flow [2022-11-20 11:05:10,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 372 transitions, 1569 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-20 11:05:10,647 INFO L231 Difference]: Finished difference. Result has 243 places, 216 transitions, 829 flow [2022-11-20 11:05:10,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=829, PETRI_PLACES=243, PETRI_TRANSITIONS=216} [2022-11-20 11:05:10,648 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 79 predicate places. [2022-11-20 11:05:10,648 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 216 transitions, 829 flow [2022-11-20 11:05:10,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.41666666666667) internal successors, (2578), 24 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:10,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:10,650 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] [2022-11-20 11:05:10,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:05:10,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:10,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1950908668, now seen corresponding path program 2 times [2022-11-20 11:05:10,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:10,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049995609] [2022-11-20 11:05:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:10,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:13,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:13,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049995609] [2022-11-20 11:05:13,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049995609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:13,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:13,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-20 11:05:13,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756187766] [2022-11-20 11:05:13,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:13,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:05:13,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:13,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:05:13,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:05:13,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 179 [2022-11-20 11:05:13,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 216 transitions, 829 flow. Second operand has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:13,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:13,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 179 [2022-11-20 11:05:13,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:17,444 INFO L130 PetriNetUnfolder]: 1256/5024 cut-off events. [2022-11-20 11:05:17,444 INFO L131 PetriNetUnfolder]: For 2356/2356 co-relation queries the response was YES. [2022-11-20 11:05:17,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11006 conditions, 5024 events. 1256/5024 cut-off events. For 2356/2356 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 39139 event pairs, 298 based on Foata normal form. 4/4941 useless extension candidates. Maximal degree in co-relation 6762. Up to 1537 conditions per place. [2022-11-20 11:05:17,511 INFO L137 encePairwiseOnDemand]: 143/179 looper letters, 234 selfloop transitions, 60 changer transitions 4/387 dead transitions. [2022-11-20 11:05:17,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 387 transitions, 2078 flow [2022-11-20 11:05:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:05:17,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 11:05:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3234 transitions. [2022-11-20 11:05:17,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5645949720670391 [2022-11-20 11:05:17,522 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3234 transitions. [2022-11-20 11:05:17,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3234 transitions. [2022-11-20 11:05:17,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:17,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3234 transitions. [2022-11-20 11:05:17,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 101.0625) internal successors, (3234), 32 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 179.0) internal successors, (5907), 33 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,550 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 179.0) internal successors, (5907), 33 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,550 INFO L175 Difference]: Start difference. First operand has 243 places, 216 transitions, 829 flow. Second operand 32 states and 3234 transitions. [2022-11-20 11:05:17,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 387 transitions, 2078 flow [2022-11-20 11:05:17,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 387 transitions, 2074 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-20 11:05:17,574 INFO L231 Difference]: Finished difference. Result has 287 places, 235 transitions, 1151 flow [2022-11-20 11:05:17,575 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1151, PETRI_PLACES=287, PETRI_TRANSITIONS=235} [2022-11-20 11:05:17,578 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 123 predicate places. [2022-11-20 11:05:17,579 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 235 transitions, 1151 flow [2022-11-20 11:05:17,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:17,580 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:17,581 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] [2022-11-20 11:05:17,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:05:17,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1956140604, now seen corresponding path program 3 times [2022-11-20 11:05:17,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:17,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907193426] [2022-11-20 11:05:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:17,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:05:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:05:20,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:05:20,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907193426] [2022-11-20 11:05:20,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907193426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:05:20,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:05:20,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-20 11:05:20,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542641388] [2022-11-20 11:05:20,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:05:20,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:05:20,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:05:20,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:05:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:05:20,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 179 [2022-11-20 11:05:20,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 235 transitions, 1151 flow. Second operand has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:20,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:05:20,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 179 [2022-11-20 11:05:20,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:05:24,727 INFO L130 PetriNetUnfolder]: 1414/5666 cut-off events. [2022-11-20 11:05:24,727 INFO L131 PetriNetUnfolder]: For 3828/3828 co-relation queries the response was YES. [2022-11-20 11:05:24,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13236 conditions, 5666 events. 1414/5666 cut-off events. For 3828/3828 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 45851 event pairs, 64 based on Foata normal form. 4/5573 useless extension candidates. Maximal degree in co-relation 7334. Up to 1326 conditions per place. [2022-11-20 11:05:25,003 INFO L137 encePairwiseOnDemand]: 144/179 looper letters, 237 selfloop transitions, 78 changer transitions 4/408 dead transitions. [2022-11-20 11:05:25,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 408 transitions, 2490 flow [2022-11-20 11:05:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:05:25,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-20 11:05:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3426 transitions. [2022-11-20 11:05:25,013 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.562931317778508 [2022-11-20 11:05:25,013 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3426 transitions. [2022-11-20 11:05:25,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3426 transitions. [2022-11-20 11:05:25,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:05:25,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3426 transitions. [2022-11-20 11:05:25,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 100.76470588235294) internal successors, (3426), 34 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:25,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 179.0) internal successors, (6265), 35 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:25,042 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 179.0) internal successors, (6265), 35 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:25,042 INFO L175 Difference]: Start difference. First operand has 287 places, 235 transitions, 1151 flow. Second operand 34 states and 3426 transitions. [2022-11-20 11:05:25,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 408 transitions, 2490 flow [2022-11-20 11:05:25,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 408 transitions, 2395 flow, removed 27 selfloop flow, removed 15 redundant places. [2022-11-20 11:05:25,075 INFO L231 Difference]: Finished difference. Result has 318 places, 252 transitions, 1460 flow [2022-11-20 11:05:25,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1460, PETRI_PLACES=318, PETRI_TRANSITIONS=252} [2022-11-20 11:05:25,077 INFO L288 CegarLoopForPetriNet]: 164 programPoint places, 154 predicate places. [2022-11-20 11:05:25,078 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 252 transitions, 1460 flow [2022-11-20 11:05:25,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 95.27586206896552) internal successors, (2763), 29 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:05:25,079 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:05:25,080 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:25,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:05:25,081 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:05:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:05:25,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1138157486, now seen corresponding path program 1 times [2022-11-20 11:05:25,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:05:25,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386797196] [2022-11-20 11:05:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:05:25,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:05:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:25,136 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:05:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:05:25,240 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:05:25,240 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:05:25,242 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2022-11-20 11:05:25,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2022-11-20 11:05:25,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-20 11:05:25,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 11:05:25,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 11:05:25,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 11:05:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:05:25,246 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:05:25,254 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-20 11:05:25,254 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 11:05:25,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:05:25 BasicIcfg [2022-11-20 11:05:25,433 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 11:05:25,434 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 11:05:25,434 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 11:05:25,435 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 11:05:25,435 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:04:59" (3/4) ... [2022-11-20 11:05:25,437 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 11:05:25,610 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 11:05:25,610 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 11:05:25,611 INFO L158 Benchmark]: Toolchain (without parser) took 27910.42ms. Allocated memory was 155.2MB in the beginning and 574.6MB in the end (delta: 419.4MB). Free memory was 120.4MB in the beginning and 278.7MB in the end (delta: -158.4MB). Peak memory consumption was 263.9MB. Max. memory is 16.1GB. [2022-11-20 11:05:25,612 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 155.2MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:05:25,612 INFO L158 Benchmark]: CACSL2BoogieTranslator took 839.72ms. Allocated memory is still 155.2MB. Free memory was 120.4MB in the beginning and 90.9MB in the end (delta: 29.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-20 11:05:25,612 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.32ms. Allocated memory is still 155.2MB. Free memory was 90.9MB in the beginning and 88.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 11:05:25,613 INFO L158 Benchmark]: Boogie Preprocessor took 40.56ms. Allocated memory is still 155.2MB. Free memory was 88.0MB in the beginning and 86.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:05:25,613 INFO L158 Benchmark]: RCFGBuilder took 827.68ms. Allocated memory is still 155.2MB. Free memory was 85.9MB in the beginning and 68.6MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-20 11:05:25,613 INFO L158 Benchmark]: TraceAbstraction took 25963.00ms. Allocated memory was 155.2MB in the beginning and 574.6MB in the end (delta: 419.4MB). Free memory was 67.9MB in the beginning and 316.5MB in the end (delta: -248.5MB). Peak memory consumption was 173.8MB. Max. memory is 16.1GB. [2022-11-20 11:05:25,614 INFO L158 Benchmark]: Witness Printer took 176.44ms. Allocated memory is still 574.6MB. Free memory was 316.5MB in the beginning and 278.7MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2022-11-20 11:05:25,616 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 155.2MB. Free memory is still 97.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 839.72ms. Allocated memory is still 155.2MB. Free memory was 120.4MB in the beginning and 90.9MB in the end (delta: 29.5MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.32ms. Allocated memory is still 155.2MB. Free memory was 90.9MB in the beginning and 88.0MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.56ms. Allocated memory is still 155.2MB. Free memory was 88.0MB in the beginning and 86.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 827.68ms. Allocated memory is still 155.2MB. Free memory was 85.9MB in the beginning and 68.6MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 25963.00ms. Allocated memory was 155.2MB in the beginning and 574.6MB in the end (delta: 419.4MB). Free memory was 67.9MB in the beginning and 316.5MB in the end (delta: -248.5MB). Peak memory consumption was 173.8MB. Max. memory is 16.1GB. * Witness Printer took 176.44ms. Allocated memory is still 574.6MB. Free memory was 316.5MB in the beginning and 278.7MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 940]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L935] 0 static int top=0; VAL [top=0] [L936] 0 static unsigned int arr[(400)]; VAL [arr={3:0}, top=0] [L937] 0 pthread_mutex_t m; VAL [arr={3:0}, m={4:0}, top=0] [L938] 0 _Bool flag=(0); VAL [arr={3:0}, flag=0, m={4:0}, top=0] [L1019] 0 pthread_t id1, id2; VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, top=0] [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L988] 1 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L989] 1 unsigned int tmp; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=0] [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L990] COND TRUE 1 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L993] 1 tmp = __VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=4294967695, arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, tmp=399, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) VAL [\old(cond)=1, arr={3:0}, cond=1, flag=0, m={4:0}, top=0] [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) VAL [\old(x)=399, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=399] [L967] CALL, EXPR 1 get_top() [L952] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x VAL [\old(x)=399, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=399] [L968] CALL 1 inc_top() [L944] 1 top++ VAL [arr={3:0}, flag=0, m={4:0}, top=1] [L1004] 2 int i; VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, m={4:0}, top=1] [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=1] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=1] [L968] RET 1 inc_top() [L970] 1 return 0; VAL [\old(x)=399, \result=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=1, x=399] [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, push(arr,tmp)=0, tmp=399, top=1] [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=399, top=1] [L1008] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=1, arr={3:0}, flag=1, m={4:0}, top=1] [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) VAL [arr={3:0}, flag=1, get_top()=1, m={4:0}, stack={3:0}, stack={3:0}, top=1] [L981] CALL 2 dec_top() [L948] 2 top-- VAL [arr={3:0}, flag=1, m={4:0}, top=0] [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=399, top=0] [L982] 2 return stack[get_top()]; VAL [\result=399, arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, stack[get_top()]=399, top=0] [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, pop(arr)=399, top=0] [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1008] COND TRUE 2 \read(flag) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; VAL [\result=0, \result=0, arr={3:0}, flag=1, m={4:0}, top=0] [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 VAL [arr={3:0}, flag=1, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L977] 2 return (-2); VAL [\result=-2, arr={3:0}, flag=1, m={4:0}, stack={3:0}, stack={3:0}, top=0] [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, pop(arr)=-2, top=0] [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 288 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 25.5s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 15.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1284 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1284 mSDsluCounter, 2902 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2673 mSDsCounter, 36 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5680 IncrementalHoareTripleChecker+Invalid, 5716 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 36 mSolverCounterUnsat, 229 mSDtfsCounter, 5680 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 396 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1460occurred in iteration=9, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 1156 NumberOfCodeBlocks, 1156 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 1098 ConstructedInterpolants, 0 QuantifiedInterpolants, 8595 SizeOfPredicates, 2 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 12/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-20 11:05:25,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d3a4ff9-df58-42a4-9915-bec7e5584585/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE