./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.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_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/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_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/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_0516a50f-132d-4073-a295-15a867dd8adc/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 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- 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 11:43:34,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:43:34,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:43:34,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:43:34,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:43:34,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:43:34,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:43:34,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:43:34,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:43:34,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:43:34,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:43:34,124 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:43:34,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:43:34,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:43:34,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:43:34,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:43:34,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:43:34,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:43:34,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:43:34,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:43:34,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:43:34,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:43:34,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:43:34,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:43:34,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:43:34,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:43:34,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:43:34,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:43:34,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:43:34,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:43:34,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:43:34,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:43:34,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:43:34,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:43:34,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:43:34,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:43:34,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:43:34,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:43:34,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:43:34,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:43:34,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:43:34,178 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 11:43:34,210 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:43:34,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:43:34,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:43:34,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:43:34,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:43:34,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:43:34,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:43:34,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:43:34,213 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:43:34,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:43:34,214 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:43:34,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:43:34,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:43:34,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:43:34,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:43:34,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:43:34,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:43:34,215 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:43:34,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:43:34,216 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:43:34,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:43:34,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:43:34,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:43:34,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:43:34,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:43:34,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:43:34,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:43:34,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:43:34,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:43:34,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:43:34,218 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:43:34,219 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:43:34,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:43:34,219 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_0516a50f-132d-4073-a295-15a867dd8adc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2022-11-20 11:43:34,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:43:34,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:43:34,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:43:34,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:43:34,499 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:43:34,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2022-11-20 11:43:37,493 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:43:37,797 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:43:37,798 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2022-11-20 11:43:37,828 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/data/fbb47c0a4/c4ec6c7e91e14f46826b7d647b7bc186/FLAG20b631314 [2022-11-20 11:43:37,844 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/data/fbb47c0a4/c4ec6c7e91e14f46826b7d647b7bc186 [2022-11-20 11:43:37,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:43:37,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:43:37,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:43:37,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:43:37,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:43:37,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:37" (1/1) ... [2022-11-20 11:43:37,859 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14448bdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:37, skipping insertion in model container [2022-11-20 11:43:37,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:43:37" (1/1) ... [2022-11-20 11:43:37,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:43:37,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:43:38,433 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_0516a50f-132d-4073-a295-15a867dd8adc/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2022-11-20 11:43:38,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:43:38,494 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:43:38,526 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_0516a50f-132d-4073-a295-15a867dd8adc/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i[47038,47051] [2022-11-20 11:43:38,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:43:38,599 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:43:38,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38 WrapperNode [2022-11-20 11:43:38,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:43:38,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:43:38,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:43:38,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:43:38,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,626 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,653 INFO L138 Inliner]: procedures = 278, calls = 61, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2022-11-20 11:43:38,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:43:38,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:43:38,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:43:38,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:43:38,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,693 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,707 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:43:38,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:43:38,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:43:38,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:43:38,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (1/1) ... [2022-11-20 11:43:38,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:43:38,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:43:38,773 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:43:38,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0516a50f-132d-4073-a295-15a867dd8adc/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:43:38,817 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:43:38,817 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:43:38,817 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-20 11:43:38,818 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-20 11:43:38,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:43:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:43:38,819 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-20 11:43:38,819 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-20 11:43:38,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:43:38,820 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:43:38,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:43:38,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:43:38,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:43:38,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:43:38,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:43:38,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:43:38,823 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 11:43:38,998 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:43:39,000 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:43:39,479 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:43:39,497 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:43:39,497 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-20 11:43:39,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:39 BoogieIcfgContainer [2022-11-20 11:43:39,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:43:39,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:43:39,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:43:39,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:43:39,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:43:37" (1/3) ... [2022-11-20 11:43:39,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509e77d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:39, skipping insertion in model container [2022-11-20 11:43:39,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:43:38" (2/3) ... [2022-11-20 11:43:39,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509e77d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:43:39, skipping insertion in model container [2022-11-20 11:43:39,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:43:39" (3/3) ... [2022-11-20 11:43:39,538 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2022-11-20 11:43:39,547 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 11:43:39,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:43:39,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 11:43:39,558 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:43:39,676 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:43:39,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 221 transitions, 464 flow [2022-11-20 11:43:39,893 INFO L130 PetriNetUnfolder]: 52/418 cut-off events. [2022-11-20 11:43:39,894 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-20 11:43:39,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 418 events. 52/418 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1642 event pairs, 0 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 214. Up to 8 conditions per place. [2022-11-20 11:43:39,903 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 221 transitions, 464 flow [2022-11-20 11:43:39,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 219 transitions, 454 flow [2022-11-20 11:43:39,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:43:39,928 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;@21d07458, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:43:39,928 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 11:43:39,952 INFO L130 PetriNetUnfolder]: 9/126 cut-off events. [2022-11-20 11:43:39,952 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 11:43:39,953 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:39,953 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:39,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-20 11:43:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 477644452, now seen corresponding path program 1 times [2022-11-20 11:43:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:39,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500715905] [2022-11-20 11:43:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:39,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:40,197 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:43:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:40,297 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:43:40,299 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:43:40,300 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 11:43:40,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 11:43:40,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-11-20 11:43:40,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 11:43:40,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:43:40,304 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 11:43:40,308 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:43:40,308 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 11:43:40,388 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-20 11:43:40,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 311 places, 344 transitions, 736 flow [2022-11-20 11:43:40,833 INFO L130 PetriNetUnfolder]: 191/1235 cut-off events. [2022-11-20 11:43:40,834 INFO L131 PetriNetUnfolder]: For 72/118 co-relation queries the response was YES. [2022-11-20 11:43:40,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 1235 events. 191/1235 cut-off events. For 72/118 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7657 event pairs, 2 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 779. Up to 32 conditions per place. [2022-11-20 11:43:40,858 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 344 transitions, 736 flow [2022-11-20 11:43:40,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 311 places, 344 transitions, 736 flow [2022-11-20 11:43:40,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:43:40,880 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;@21d07458, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:43:40,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 11:43:40,919 INFO L130 PetriNetUnfolder]: 20/263 cut-off events. [2022-11-20 11:43:40,920 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 11:43:40,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:40,920 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2022-11-20 11:43:40,921 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-20 11:43:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:40,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1694256810, now seen corresponding path program 1 times [2022-11-20 11:43:40,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:40,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948380780] [2022-11-20 11:43:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:40,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:41,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:43:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:41,111 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:43:41,112 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:43:41,112 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 11:43:41,112 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 11:43:41,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-11-20 11:43:41,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 11:43:41,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 11:43:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:43:41,114 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 11:43:41,114 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:43:41,115 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 11:43:41,224 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-20 11:43:41,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 419 places, 467 transitions, 1012 flow [2022-11-20 11:43:42,710 INFO L130 PetriNetUnfolder]: 664/3422 cut-off events. [2022-11-20 11:43:42,711 INFO L131 PetriNetUnfolder]: For 419/519 co-relation queries the response was YES. [2022-11-20 11:43:42,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 3422 events. 664/3422 cut-off events. For 419/519 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 26361 event pairs, 52 based on Foata normal form. 0/2908 useless extension candidates. Maximal degree in co-relation 2240. Up to 192 conditions per place. [2022-11-20 11:43:42,802 INFO L82 GeneralOperation]: Start removeDead. Operand has 419 places, 467 transitions, 1012 flow [2022-11-20 11:43:42,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 419 places, 467 transitions, 1012 flow [2022-11-20 11:43:42,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:43:42,872 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;@21d07458, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:43:42,873 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 11:43:42,968 INFO L130 PetriNetUnfolder]: 44/507 cut-off events. [2022-11-20 11:43:42,969 INFO L131 PetriNetUnfolder]: For 22/42 co-relation queries the response was YES. [2022-11-20 11:43:42,970 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:42,970 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:43:42,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-11-20 11:43:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:42,972 INFO L85 PathProgramCache]: Analyzing trace with hash -613406248, now seen corresponding path program 1 times [2022-11-20 11:43:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:42,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066693921] [2022-11-20 11:43:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:43,071 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:43:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:43,120 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:43:43,120 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:43:43,120 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 11:43:43,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 11:43:43,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-11-20 11:43:43,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 11:43:43,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 11:43:43,122 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 11:43:43,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:43:43,123 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-20 11:43:43,123 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:43:43,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 11:43:43,250 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-20 11:43:43,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 527 places, 590 transitions, 1292 flow [2022-11-20 11:43:48,298 INFO L130 PetriNetUnfolder]: 2659/10759 cut-off events. [2022-11-20 11:43:48,298 INFO L131 PetriNetUnfolder]: For 2144/2314 co-relation queries the response was YES. [2022-11-20 11:43:48,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12924 conditions, 10759 events. 2659/10759 cut-off events. For 2144/2314 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 98795 event pairs, 626 based on Foata normal form. 0/9311 useless extension candidates. Maximal degree in co-relation 6922. Up to 1024 conditions per place. [2022-11-20 11:43:48,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 527 places, 590 transitions, 1292 flow [2022-11-20 11:43:49,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 527 places, 590 transitions, 1292 flow [2022-11-20 11:43:49,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:43:49,010 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;@21d07458, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:43:49,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 11:43:49,206 INFO L130 PetriNetUnfolder]: 50/591 cut-off events. [2022-11-20 11:43:49,207 INFO L131 PetriNetUnfolder]: For 39/59 co-relation queries the response was YES. [2022-11-20 11:43:49,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:49,207 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] [2022-11-20 11:43:49,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:43:49,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash -175257657, now seen corresponding path program 1 times [2022-11-20 11:43:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:49,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909605178] [2022-11-20 11:43:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:49,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:49,337 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 11:43:49,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:49,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909605178] [2022-11-20 11:43:49,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909605178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:49,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:49,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:43:49,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995343610] [2022-11-20 11:43:49,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:49,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:43:49,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:49,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:43:49,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:43:49,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 510 out of 590 [2022-11-20 11:43:49,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 590 transitions, 1292 flow. Second operand has 2 states, 2 states have (on average 511.5) internal successors, (1023), 2 states have internal predecessors, (1023), 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 11:43:49,394 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:49,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 510 of 590 [2022-11-20 11:43:49,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:54,627 INFO L130 PetriNetUnfolder]: 1877/9957 cut-off events. [2022-11-20 11:43:54,628 INFO L131 PetriNetUnfolder]: For 6431/7878 co-relation queries the response was YES. [2022-11-20 11:43:54,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14195 conditions, 9957 events. 1877/9957 cut-off events. For 6431/7878 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 96820 event pairs, 313 based on Foata normal form. 12704/21941 useless extension candidates. Maximal degree in co-relation 7317. Up to 2073 conditions per place. [2022-11-20 11:43:55,018 INFO L137 encePairwiseOnDemand]: 538/590 looper letters, 24 selfloop transitions, 0 changer transitions 0/534 dead transitions. [2022-11-20 11:43:55,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 534 transitions, 1228 flow [2022-11-20 11:43:55,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:43:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 11:43:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1096 transitions. [2022-11-20 11:43:55,042 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9288135593220339 [2022-11-20 11:43:55,043 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 1096 transitions. [2022-11-20 11:43:55,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 1096 transitions. [2022-11-20 11:43:55,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:55,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 1096 transitions. [2022-11-20 11:43:55,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 548.0) internal successors, (1096), 2 states have internal predecessors, (1096), 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 11:43:55,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 590.0) internal successors, (1770), 3 states have internal predecessors, (1770), 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 11:43:55,071 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 590.0) internal successors, (1770), 3 states have internal predecessors, (1770), 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 11:43:55,075 INFO L175 Difference]: Start difference. First operand has 527 places, 590 transitions, 1292 flow. Second operand 2 states and 1096 transitions. [2022-11-20 11:43:55,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 534 transitions, 1228 flow [2022-11-20 11:43:55,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 534 transitions, 1228 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:43:55,102 INFO L231 Difference]: Finished difference. Result has 524 places, 534 transitions, 1180 flow [2022-11-20 11:43:55,105 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1180, PETRI_PLACES=524, PETRI_TRANSITIONS=534} [2022-11-20 11:43:55,111 INFO L288 CegarLoopForPetriNet]: 527 programPoint places, -3 predicate places. [2022-11-20 11:43:55,111 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 534 transitions, 1180 flow [2022-11-20 11:43:55,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 511.5) internal successors, (1023), 2 states have internal predecessors, (1023), 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 11:43:55,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:55,113 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] [2022-11-20 11:43:55,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:43:55,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:43:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash -338284719, now seen corresponding path program 1 times [2022-11-20 11:43:55,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:55,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804383304] [2022-11-20 11:43:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:55,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:43:55,258 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 11:43:55,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:43:55,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804383304] [2022-11-20 11:43:55,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804383304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:43:55,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:43:55,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:43:55,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067651622] [2022-11-20 11:43:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:43:55,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:43:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:43:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:43:55,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:43:55,263 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 503 out of 590 [2022-11-20 11:43:55,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 534 transitions, 1180 flow. Second operand has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 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 11:43:55,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:43:55,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 503 of 590 [2022-11-20 11:43:55,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 11:43:59,445 INFO L130 PetriNetUnfolder]: 1860/9591 cut-off events. [2022-11-20 11:43:59,446 INFO L131 PetriNetUnfolder]: For 6428/8140 co-relation queries the response was YES. [2022-11-20 11:43:59,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13832 conditions, 9591 events. 1860/9591 cut-off events. For 6428/8140 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 92967 event pairs, 324 based on Foata normal form. 2/8903 useless extension candidates. Maximal degree in co-relation 13821. Up to 2088 conditions per place. [2022-11-20 11:43:59,874 INFO L137 encePairwiseOnDemand]: 587/590 looper letters, 33 selfloop transitions, 2 changer transitions 0/538 dead transitions. [2022-11-20 11:43:59,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 538 transitions, 1258 flow [2022-11-20 11:43:59,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:43:59,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 11:43:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1545 transitions. [2022-11-20 11:43:59,879 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8728813559322034 [2022-11-20 11:43:59,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1545 transitions. [2022-11-20 11:43:59,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1545 transitions. [2022-11-20 11:43:59,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 11:43:59,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1545 transitions. [2022-11-20 11:43:59,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 515.0) internal successors, (1545), 3 states have internal predecessors, (1545), 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 11:43:59,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 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 11:43:59,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 590.0) internal successors, (2360), 4 states have internal predecessors, (2360), 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 11:43:59,899 INFO L175 Difference]: Start difference. First operand has 524 places, 534 transitions, 1180 flow. Second operand 3 states and 1545 transitions. [2022-11-20 11:43:59,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 538 transitions, 1258 flow [2022-11-20 11:43:59,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 538 transitions, 1258 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 11:43:59,926 INFO L231 Difference]: Finished difference. Result has 527 places, 535 transitions, 1192 flow [2022-11-20 11:43:59,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=590, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1192, PETRI_PLACES=527, PETRI_TRANSITIONS=535} [2022-11-20 11:43:59,929 INFO L288 CegarLoopForPetriNet]: 527 programPoint places, 0 predicate places. [2022-11-20 11:43:59,930 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 535 transitions, 1192 flow [2022-11-20 11:43:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 504.3333333333333) internal successors, (1513), 3 states have internal predecessors, (1513), 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 11:43:59,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:43:59,931 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:43:59,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:43:59,932 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-20 11:43:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:43:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash 602772942, now seen corresponding path program 1 times [2022-11-20 11:43:59,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:43:59,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445960875] [2022-11-20 11:43:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:43:59,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:43:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:43:59,974 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 11:44:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 11:44:00,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 11:44:00,041 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 11:44:00,041 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-20 11:44:00,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-20 11:44:00,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-11-20 11:44:00,044 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-11-20 11:44:00,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-11-20 11:44:00,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-20 11:44:00,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-20 11:44:00,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:44:00,046 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 11:44:00,046 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 11:44:00,047 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 11:44:00,165 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2022-11-20 11:44:00,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 635 places, 713 transitions, 1576 flow [2022-11-20 11:44:20,873 INFO L130 PetriNetUnfolder]: 11792/39230 cut-off events. [2022-11-20 11:44:20,874 INFO L131 PetriNetUnfolder]: For 10450/10706 co-relation queries the response was YES. [2022-11-20 11:44:23,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49656 conditions, 39230 events. 11792/39230 cut-off events. For 10450/10706 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 425634 event pairs, 4296 based on Foata normal form. 0/34504 useless extension candidates. Maximal degree in co-relation 24980. Up to 5120 conditions per place. [2022-11-20 11:44:23,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 635 places, 713 transitions, 1576 flow [2022-11-20 11:44:24,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 635 places, 713 transitions, 1576 flow [2022-11-20 11:44:24,527 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:44:24,528 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;@21d07458, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:44:24,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-20 11:44:24,601 INFO L130 PetriNetUnfolder]: 52/594 cut-off events. [2022-11-20 11:44:24,601 INFO L131 PetriNetUnfolder]: For 39/59 co-relation queries the response was YES. [2022-11-20 11:44:24,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 11:44:24,601 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] [2022-11-20 11:44:24,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [t2_funErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2022-11-20 11:44:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:44:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash -718292036, now seen corresponding path program 1 times [2022-11-20 11:44:24,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:44:24,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664559740] [2022-11-20 11:44:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:44:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:44:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:44:24,652 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 11:44:24,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:44:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664559740] [2022-11-20 11:44:24,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664559740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:44:24,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:44:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:44:24,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468914935] [2022-11-20 11:44:24,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:44:24,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:44:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:44:24,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:44:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:44:24,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 614 out of 713 [2022-11-20 11:44:24,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 713 transitions, 1576 flow. Second operand has 2 states, 2 states have (on average 615.5) internal successors, (1231), 2 states have internal predecessors, (1231), 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 11:44:24,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 11:44:24,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 614 of 713 [2022-11-20 11:44:24,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand