./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8 --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 b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 --- 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-2329fc7 [2022-12-13 19:06:30,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:06:30,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:06:30,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:06:30,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:06:30,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:06:30,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:06:30,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:06:30,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:06:30,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:06:30,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:06:30,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:06:30,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:06:30,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:06:30,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:06:30,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:06:30,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:06:30,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:06:30,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:06:30,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:06:30,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:06:30,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:06:30,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:06:30,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:06:30,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:06:30,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:06:30,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:06:30,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:06:30,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:06:30,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:06:30,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:06:30,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:06:30,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:06:30,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:06:30,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:06:30,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:06:30,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:06:30,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:06:30,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:06:30,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:06:30,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:06:30,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:06:30,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:06:30,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:06:30,209 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:06:30,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:06:30,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:06:30,210 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:06:30,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:06:30,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:06:30,211 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:06:30,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:06:30,211 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:06:30,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:06:30,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:06:30,212 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:06:30,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:06:30,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:06:30,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:06:30,212 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:06:30,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:06:30,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:06:30,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:06:30,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:06:30,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:06:30,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:06:30,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:06:30,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:06:30,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:06:30,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:06:30,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:06:30,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:06:30,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:06:30,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:06:30,215 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:06:30,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:06:30,216 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:06:30,216 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4439281d7e12bca3fd2bd39ebda4196e341f38fedf1c370a96bdabb4944cfe7 [2022-12-13 19:06:30,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:06:30,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:06:30,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:06:30,424 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:06:30,425 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:06:30,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2022-12-13 19:06:33,077 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:06:33,288 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:06:33,289 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i [2022-12-13 19:06:33,302 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/data/f604863c5/ba27526dea8442899c4f0f992cea54a0/FLAG621b162f8 [2022-12-13 19:06:33,315 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/data/f604863c5/ba27526dea8442899c4f0f992cea54a0 [2022-12-13 19:06:33,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:06:33,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:06:33,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:06:33,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:06:33,323 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:06:33,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53062a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33, skipping insertion in model container [2022-12-13 19:06:33,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:06:33,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:06:33,683 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_6fe2d129-a9ad-4493-9944-49a6de83eefb/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2022-12-13 19:06:33,698 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:06:33,707 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:06:33,732 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_6fe2d129-a9ad-4493-9944-49a6de83eefb/sv-benchmarks/c/goblint-regression/28-race_reach_08-cond_racefree.i[41322,41335] [2022-12-13 19:06:33,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:06:33,772 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:06:33,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33 WrapperNode [2022-12-13 19:06:33,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:06:33,773 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:06:33,773 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:06:33,773 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:06:33,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,816 INFO L138 Inliner]: procedures = 270, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2022-12-13 19:06:33,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:06:33,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:06:33,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:06:33,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:06:33,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,837 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:06:33,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:06:33,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:06:33,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:06:33,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (1/1) ... [2022-12-13 19:06:33,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:06:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:06:33,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:06:33,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:06:33,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:06:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:06:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:06:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:06:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 19:06:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:06:33,899 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 19:06:33,899 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 19:06:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:06:33,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:06:33,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:06:33,901 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 19:06:34,037 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:06:34,038 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:06:34,183 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:06:34,188 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:06:34,188 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 19:06:34,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:06:34 BoogieIcfgContainer [2022-12-13 19:06:34,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:06:34,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:06:34,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:06:34,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:06:34,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:06:33" (1/3) ... [2022-12-13 19:06:34,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c34b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:06:34, skipping insertion in model container [2022-12-13 19:06:34,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:06:33" (2/3) ... [2022-12-13 19:06:34,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c34b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:06:34, skipping insertion in model container [2022-12-13 19:06:34,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:06:34" (3/3) ... [2022-12-13 19:06:34,196 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_08-cond_racefree.i [2022-12-13 19:06:34,202 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 19:06:34,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:06:34,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:06:34,209 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 19:06:34,245 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 19:06:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 126 transitions, 260 flow [2022-12-13 19:06:34,309 INFO L130 PetriNetUnfolder]: 23/171 cut-off events. [2022-12-13 19:06:34,309 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 19:06:34,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 171 events. 23/171 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 385 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2022-12-13 19:06:34,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 126 transitions, 260 flow [2022-12-13 19:06:34,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 121 transitions, 247 flow [2022-12-13 19:06:34,320 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:06:34,328 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 121 transitions, 247 flow [2022-12-13 19:06:34,330 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 121 transitions, 247 flow [2022-12-13 19:06:34,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 121 transitions, 247 flow [2022-12-13 19:06:34,355 INFO L130 PetriNetUnfolder]: 22/166 cut-off events. [2022-12-13 19:06:34,355 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:06:34,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 166 events. 22/166 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 370 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 86. Up to 6 conditions per place. [2022-12-13 19:06:34,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 2856 [2022-12-13 19:06:36,583 INFO L134 LiptonReduction]: Checked pairs total: 4515 [2022-12-13 19:06:36,583 INFO L136 LiptonReduction]: Total number of compositions: 109 [2022-12-13 19:06:36,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:06:36,598 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;@218dc11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:06:36,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 19:06:36,601 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 19:06:36,601 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:06:36,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:36,601 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:06:36,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash 14926385, now seen corresponding path program 1 times [2022-12-13 19:06:36,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:36,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436698889] [2022-12-13 19:06:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:36,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:36,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:36,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:06:36,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436698889] [2022-12-13 19:06:36,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436698889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:06:36,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:06:36,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:06:36,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268469310] [2022-12-13 19:06:36,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:06:36,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:06:36,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:06:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:06:36,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:06:36,802 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 235 [2022-12-13 19:06:36,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2022-12-13 19:06:36,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:06:36,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 235 [2022-12-13 19:06:36,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:06:36,880 INFO L130 PetriNetUnfolder]: 97/210 cut-off events. [2022-12-13 19:06:36,880 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:06:36,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 210 events. 97/210 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 742 event pairs, 70 based on Foata normal form. 12/186 useless extension candidates. Maximal degree in co-relation 409. Up to 197 conditions per place. [2022-12-13 19:06:36,882 INFO L137 encePairwiseOnDemand]: 223/235 looper letters, 22 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2022-12-13 19:06:36,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 133 flow [2022-12-13 19:06:36,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:06:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:06:36,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2022-12-13 19:06:36,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.526241134751773 [2022-12-13 19:06:36,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2022-12-13 19:06:36,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2022-12-13 19:06:36,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:06:36,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2022-12-13 19:06:36,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 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) [2022-12-13 19:06:36,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 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) [2022-12-13 19:06:36,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 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) [2022-12-13 19:06:36,911 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 371 transitions. [2022-12-13 19:06:36,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 133 flow [2022-12-13 19:06:36,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:06:36,914 INFO L231 Difference]: Finished difference. Result has 29 places, 17 transitions, 47 flow [2022-12-13 19:06:36,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2022-12-13 19:06:36,920 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2022-12-13 19:06:36,920 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 47 flow [2022-12-13 19:06:36,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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) [2022-12-13 19:06:36,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:36,921 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 19:06:36,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:06:36,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1432994924, now seen corresponding path program 1 times [2022-12-13 19:06:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:36,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991907248] [2022-12-13 19:06:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:36,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:06:36,951 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:06:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:06:36,989 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:06:36,990 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:06:36,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 19:06:36,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 19:06:36,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:06:36,994 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 19:06:36,997 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 19:06:36,997 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 19:06:37,018 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 19:06:37,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 156 transitions, 330 flow [2022-12-13 19:06:37,053 INFO L130 PetriNetUnfolder]: 40/271 cut-off events. [2022-12-13 19:06:37,053 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:06:37,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 271 events. 40/271 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 774 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 173. Up to 9 conditions per place. [2022-12-13 19:06:37,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 156 transitions, 330 flow [2022-12-13 19:06:37,056 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 156 transitions, 330 flow [2022-12-13 19:06:37,056 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:06:37,056 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 156 transitions, 330 flow [2022-12-13 19:06:37,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 156 transitions, 330 flow [2022-12-13 19:06:37,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 156 transitions, 330 flow [2022-12-13 19:06:37,086 INFO L130 PetriNetUnfolder]: 40/271 cut-off events. [2022-12-13 19:06:37,086 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 19:06:37,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 271 events. 40/271 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 774 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 173. Up to 9 conditions per place. [2022-12-13 19:06:37,093 INFO L119 LiptonReduction]: Number of co-enabled transitions 7896 [2022-12-13 19:06:39,469 INFO L134 LiptonReduction]: Checked pairs total: 19704 [2022-12-13 19:06:39,469 INFO L136 LiptonReduction]: Total number of compositions: 123 [2022-12-13 19:06:39,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:06:39,471 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;@218dc11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:06:39,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 19:06:39,473 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 19:06:39,473 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:06:39,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:39,473 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:06:39,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash 24437279, now seen corresponding path program 1 times [2022-12-13 19:06:39,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:39,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917643692] [2022-12-13 19:06:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:39,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:06:39,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917643692] [2022-12-13 19:06:39,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917643692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:06:39,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:06:39,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:06:39,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620249384] [2022-12-13 19:06:39,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:06:39,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:06:39,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:06:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:06:39,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:06:39,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 279 [2022-12-13 19:06:39,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:06:39,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:06:39,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 279 [2022-12-13 19:06:39,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:06:39,748 INFO L130 PetriNetUnfolder]: 1446/2610 cut-off events. [2022-12-13 19:06:39,748 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 19:06:39,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 2610 events. 1446/2610 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 15895 event pairs, 648 based on Foata normal form. 290/2601 useless extension candidates. Maximal degree in co-relation 669. Up to 2327 conditions per place. [2022-12-13 19:06:39,754 INFO L137 encePairwiseOnDemand]: 261/279 looper letters, 28 selfloop transitions, 2 changer transitions 11/51 dead transitions. [2022-12-13 19:06:39,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 51 transitions, 200 flow [2022-12-13 19:06:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:06:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:06:39,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2022-12-13 19:06:39,756 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5400238948626045 [2022-12-13 19:06:39,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2022-12-13 19:06:39,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2022-12-13 19:06:39,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:06:39,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2022-12-13 19:06:39,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 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) [2022-12-13 19:06:39,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 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) [2022-12-13 19:06:39,760 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 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) [2022-12-13 19:06:39,760 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 452 transitions. [2022-12-13 19:06:39,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 51 transitions, 200 flow [2022-12-13 19:06:39,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:06:39,761 INFO L231 Difference]: Finished difference. Result has 48 places, 33 transitions, 88 flow [2022-12-13 19:06:39,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=48, PETRI_TRANSITIONS=33} [2022-12-13 19:06:39,762 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2022-12-13 19:06:39,762 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 33 transitions, 88 flow [2022-12-13 19:06:39,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:06:39,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:39,763 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:06:39,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:06:39,763 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1707949721, now seen corresponding path program 1 times [2022-12-13 19:06:39,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:39,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797044280] [2022-12-13 19:06:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:39,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:39,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:06:39,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797044280] [2022-12-13 19:06:39,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797044280] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:06:39,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047000891] [2022-12-13 19:06:39,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:39,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:06:39,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:06:39,809 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:06:39,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:06:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:39,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:06:39,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:06:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:39,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:06:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:39,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047000891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:06:39,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:06:39,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 19:06:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324409417] [2022-12-13 19:06:39,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:06:39,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:06:39,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:06:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:06:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:06:39,933 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 279 [2022-12-13 19:06:39,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 33 transitions, 88 flow. Second operand has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2022-12-13 19:06:39,933 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:06:39,933 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 279 [2022-12-13 19:06:39,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:06:40,024 INFO L130 PetriNetUnfolder]: 286/567 cut-off events. [2022-12-13 19:06:40,024 INFO L131 PetriNetUnfolder]: For 147/147 co-relation queries the response was YES. [2022-12-13 19:06:40,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1214 conditions, 567 events. 286/567 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2744 event pairs, 49 based on Foata normal form. 70/636 useless extension candidates. Maximal degree in co-relation 175. Up to 346 conditions per place. [2022-12-13 19:06:40,027 INFO L137 encePairwiseOnDemand]: 276/279 looper letters, 39 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2022-12-13 19:06:40,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 208 flow [2022-12-13 19:06:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:06:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 19:06:40,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2022-12-13 19:06:40,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4939068100358423 [2022-12-13 19:06:40,029 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2022-12-13 19:06:40,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2022-12-13 19:06:40,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:06:40,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2022-12-13 19:06:40,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 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) [2022-12-13 19:06:40,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 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) [2022-12-13 19:06:40,033 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 279.0) internal successors, (1674), 6 states have internal predecessors, (1674), 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) [2022-12-13 19:06:40,033 INFO L175 Difference]: Start difference. First operand has 48 places, 33 transitions, 88 flow. Second operand 5 states and 689 transitions. [2022-12-13 19:06:40,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 208 flow [2022-12-13 19:06:40,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 204 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 19:06:40,035 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-12-13 19:06:40,035 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 19:06:40,035 INFO L288 CegarLoopForPetriNet]: 45 programPoint places, -5 predicate places. [2022-12-13 19:06:40,035 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-12-13 19:06:40,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 131.0) internal successors, (786), 6 states have internal predecessors, (786), 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) [2022-12-13 19:06:40,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:40,036 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 19:06:40,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:06:40,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:06:40,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:40,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1944526835, now seen corresponding path program 1 times [2022-12-13 19:06:40,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:40,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12104345] [2022-12-13 19:06:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:40,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:06:40,269 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:06:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:06:40,286 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:06:40,286 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:06:40,286 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 19:06:40,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 19:06:40,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:06:40,287 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 19:06:40,288 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 19:06:40,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 19:06:40,305 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 19:06:40,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 186 transitions, 402 flow [2022-12-13 19:06:40,353 INFO L130 PetriNetUnfolder]: 62/404 cut-off events. [2022-12-13 19:06:40,353 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 19:06:40,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 404 events. 62/404 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1322 event pairs, 1 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 279. Up to 16 conditions per place. [2022-12-13 19:06:40,356 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 186 transitions, 402 flow [2022-12-13 19:06:40,359 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 186 transitions, 402 flow [2022-12-13 19:06:40,359 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:06:40,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 186 transitions, 402 flow [2022-12-13 19:06:40,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 186 transitions, 402 flow [2022-12-13 19:06:40,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 186 transitions, 402 flow [2022-12-13 19:06:40,402 INFO L130 PetriNetUnfolder]: 62/404 cut-off events. [2022-12-13 19:06:40,402 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 19:06:40,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 404 events. 62/404 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1322 event pairs, 1 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 279. Up to 16 conditions per place. [2022-12-13 19:06:40,416 INFO L119 LiptonReduction]: Number of co-enabled transitions 14448 [2022-12-13 19:06:42,900 INFO L134 LiptonReduction]: Checked pairs total: 35288 [2022-12-13 19:06:42,900 INFO L136 LiptonReduction]: Total number of compositions: 138 [2022-12-13 19:06:42,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:06:42,903 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;@218dc11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:06:42,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 19:06:42,905 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 19:06:42,905 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:06:42,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:42,906 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:06:42,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:42,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash 35335560, now seen corresponding path program 1 times [2022-12-13 19:06:42,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533827526] [2022-12-13 19:06:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:42,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:06:42,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533827526] [2022-12-13 19:06:42,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533827526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:06:42,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:06:42,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:06:42,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648186318] [2022-12-13 19:06:42,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:06:42,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:06:42,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:06:42,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:06:42,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:06:42,947 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 324 [2022-12-13 19:06:42,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 76 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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) [2022-12-13 19:06:42,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:06:42,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 324 [2022-12-13 19:06:42,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:06:44,666 INFO L130 PetriNetUnfolder]: 16282/25249 cut-off events. [2022-12-13 19:06:44,666 INFO L131 PetriNetUnfolder]: For 803/803 co-relation queries the response was YES. [2022-12-13 19:06:44,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48818 conditions, 25249 events. 16282/25249 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 185131 event pairs, 10205 based on Foata normal form. 5631/28268 useless extension candidates. Maximal degree in co-relation 5143. Up to 22994 conditions per place. [2022-12-13 19:06:44,743 INFO L137 encePairwiseOnDemand]: 300/324 looper letters, 35 selfloop transitions, 2 changer transitions 12/64 dead transitions. [2022-12-13 19:06:44,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 254 flow [2022-12-13 19:06:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:06:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:06:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 532 transitions. [2022-12-13 19:06:44,745 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5473251028806584 [2022-12-13 19:06:44,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 532 transitions. [2022-12-13 19:06:44,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 532 transitions. [2022-12-13 19:06:44,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:06:44,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 532 transitions. [2022-12-13 19:06:44,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 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) [2022-12-13 19:06:44,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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) [2022-12-13 19:06:44,749 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 324.0) internal successors, (1296), 4 states have internal predecessors, (1296), 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) [2022-12-13 19:06:44,749 INFO L175 Difference]: Start difference. First operand has 59 places, 76 transitions, 182 flow. Second operand 3 states and 532 transitions. [2022-12-13 19:06:44,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 254 flow [2022-12-13 19:06:44,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:06:44,752 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 121 flow [2022-12-13 19:06:44,752 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2022-12-13 19:06:44,752 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2022-12-13 19:06:44,752 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 121 flow [2022-12-13 19:06:44,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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) [2022-12-13 19:06:44,753 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:44,753 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:06:44,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:06:44,753 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:44,754 INFO L85 PathProgramCache]: Analyzing trace with hash -476917534, now seen corresponding path program 1 times [2022-12-13 19:06:44,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:44,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333653880] [2022-12-13 19:06:44,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:44,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:44,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:06:44,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333653880] [2022-12-13 19:06:44,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333653880] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:06:44,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180296120] [2022-12-13 19:06:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:06:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:06:44,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:06:44,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:06:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:06:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:06:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:44,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:06:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:44,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180296120] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:06:44,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:06:44,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 19:06:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601454152] [2022-12-13 19:06:44,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:06:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:06:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:06:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:06:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:06:44,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 324 [2022-12-13 19:06:44,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 153.28571428571428) internal successors, (1073), 7 states have internal predecessors, (1073), 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) [2022-12-13 19:06:44,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:06:44,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 324 [2022-12-13 19:06:44,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:06:45,344 INFO L130 PetriNetUnfolder]: 3352/5541 cut-off events. [2022-12-13 19:06:45,344 INFO L131 PetriNetUnfolder]: For 2214/2214 co-relation queries the response was YES. [2022-12-13 19:06:45,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12552 conditions, 5541 events. 3352/5541 cut-off events. For 2214/2214 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 36139 event pairs, 432 based on Foata normal form. 511/6021 useless extension candidates. Maximal degree in co-relation 8798. Up to 3178 conditions per place. [2022-12-13 19:06:45,362 INFO L137 encePairwiseOnDemand]: 321/324 looper letters, 67 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2022-12-13 19:06:45,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 345 flow [2022-12-13 19:06:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:06:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:06:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 980 transitions. [2022-12-13 19:06:45,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5041152263374485 [2022-12-13 19:06:45,364 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 980 transitions. [2022-12-13 19:06:45,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 980 transitions. [2022-12-13 19:06:45,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:06:45,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 980 transitions. [2022-12-13 19:06:45,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.33333333333334) internal successors, (980), 6 states have internal predecessors, (980), 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) [2022-12-13 19:06:45,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 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) [2022-12-13 19:06:45,369 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 324.0) internal successors, (2268), 7 states have internal predecessors, (2268), 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) [2022-12-13 19:06:45,369 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 121 flow. Second operand 6 states and 980 transitions. [2022-12-13 19:06:45,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 345 flow [2022-12-13 19:06:45,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 86 transitions, 337 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 19:06:45,374 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 19:06:45,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=324, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 19:06:45,374 INFO L288 CegarLoopForPetriNet]: 59 programPoint places, -4 predicate places. [2022-12-13 19:06:45,374 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 19:06:45,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.28571428571428) internal successors, (1073), 7 states have internal predecessors, (1073), 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) [2022-12-13 19:06:45,375 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:45,375 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 19:06:45,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:06:45,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:06:45,577 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:45,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:45,578 INFO L85 PathProgramCache]: Analyzing trace with hash 184201449, now seen corresponding path program 1 times [2022-12-13 19:06:45,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:45,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271264206] [2022-12-13 19:06:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:45,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:06:45,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:06:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:06:45,631 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:06:45,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:06:45,632 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 19:06:45,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 19:06:45,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 19:06:45,632 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 19:06:45,632 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 19:06:45,633 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 19:06:45,651 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 19:06:45,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 216 transitions, 476 flow [2022-12-13 19:06:45,715 INFO L130 PetriNetUnfolder]: 96/605 cut-off events. [2022-12-13 19:06:45,715 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 19:06:45,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 605 events. 96/605 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2276 event pairs, 6 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 424. Up to 32 conditions per place. [2022-12-13 19:06:45,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 189 places, 216 transitions, 476 flow [2022-12-13 19:06:45,720 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 216 transitions, 476 flow [2022-12-13 19:06:45,720 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:06:45,720 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 216 transitions, 476 flow [2022-12-13 19:06:45,721 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 216 transitions, 476 flow [2022-12-13 19:06:45,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 216 transitions, 476 flow [2022-12-13 19:06:45,792 INFO L130 PetriNetUnfolder]: 96/605 cut-off events. [2022-12-13 19:06:45,793 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 19:06:45,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 605 events. 96/605 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2276 event pairs, 6 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 424. Up to 32 conditions per place. [2022-12-13 19:06:45,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 22736 [2022-12-13 19:06:48,458 INFO L134 LiptonReduction]: Checked pairs total: 59603 [2022-12-13 19:06:48,458 INFO L136 LiptonReduction]: Total number of compositions: 153 [2022-12-13 19:06:48,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:06:48,460 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;@218dc11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:06:48,460 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 19:06:48,461 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 19:06:48,461 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:06:48,462 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:06:48,462 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:06:48,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:06:48,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:06:48,462 INFO L85 PathProgramCache]: Analyzing trace with hash 47617785, now seen corresponding path program 1 times [2022-12-13 19:06:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:06:48,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157548267] [2022-12-13 19:06:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:06:48,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:06:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:06:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:06:48,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:06:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157548267] [2022-12-13 19:06:48,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157548267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:06:48,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:06:48,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:06:48,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970104312] [2022-12-13 19:06:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:06:48,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:06:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:06:48,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:06:48,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:06:48,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 369 [2022-12-13 19:06:48,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 95 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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) [2022-12-13 19:06:48,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:06:48,493 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 369 [2022-12-13 19:06:48,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:07:13,973 INFO L130 PetriNetUnfolder]: 298488/413993 cut-off events. [2022-12-13 19:07:13,974 INFO L131 PetriNetUnfolder]: For 14774/14774 co-relation queries the response was YES. [2022-12-13 19:07:14,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810088 conditions, 413993 events. 298488/413993 cut-off events. For 14774/14774 co-relation queries the response was YES. Maximal size of possible extension queue 9173. Compared 3253152 event pairs, 214740 based on Foata normal form. 66901/448051 useless extension candidates. Maximal degree in co-relation 70928. Up to 387778 conditions per place. [2022-12-13 19:07:15,361 INFO L137 encePairwiseOnDemand]: 339/369 looper letters, 49 selfloop transitions, 2 changer transitions 13/79 dead transitions. [2022-12-13 19:07:15,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 328 flow [2022-12-13 19:07:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:07:15,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 19:07:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2022-12-13 19:07:15,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5591689250225835 [2022-12-13 19:07:15,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2022-12-13 19:07:15,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2022-12-13 19:07:15,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:07:15,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2022-12-13 19:07:15,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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) [2022-12-13 19:07:15,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2022-12-13 19:07:15,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 369.0) internal successors, (1476), 4 states have internal predecessors, (1476), 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) [2022-12-13 19:07:15,369 INFO L175 Difference]: Start difference. First operand has 73 places, 95 transitions, 234 flow. Second operand 3 states and 619 transitions. [2022-12-13 19:07:15,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 328 flow [2022-12-13 19:07:15,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 79 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 19:07:15,375 INFO L231 Difference]: Finished difference. Result has 76 places, 57 transitions, 156 flow [2022-12-13 19:07:15,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=76, PETRI_TRANSITIONS=57} [2022-12-13 19:07:15,376 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2022-12-13 19:07:15,376 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 57 transitions, 156 flow [2022-12-13 19:07:15,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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) [2022-12-13 19:07:15,376 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:07:15,376 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:07:15,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 19:07:15,377 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:07:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:07:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash 467111451, now seen corresponding path program 1 times [2022-12-13 19:07:15,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:07:15,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277580034] [2022-12-13 19:07:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:07:15,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:07:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:07:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:07:15,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:07:15,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277580034] [2022-12-13 19:07:15,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277580034] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:07:15,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247403964] [2022-12-13 19:07:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:07:15,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:07:15,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:07:15,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:07:15,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:07:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:07:15,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:07:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:07:15,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:07:15,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:07:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:07:15,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247403964] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:07:15,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:07:15,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-13 19:07:15,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894857227] [2022-12-13 19:07:15,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:07:15,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:07:15,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:07:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:07:15,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:07:15,525 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 369 [2022-12-13 19:07:15,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 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) [2022-12-13 19:07:15,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:07:15,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 369 [2022-12-13 19:07:15,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 19:07:24,715 INFO L130 PetriNetUnfolder]: 123712/166384 cut-off events. [2022-12-13 19:07:24,715 INFO L131 PetriNetUnfolder]: For 14860/14860 co-relation queries the response was YES. [2022-12-13 19:07:24,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345909 conditions, 166384 events. 123712/166384 cut-off events. For 14860/14860 co-relation queries the response was YES. Maximal size of possible extension queue 4111. Compared 1160199 event pairs, 5821 based on Foata normal form. 738/167092 useless extension candidates. Maximal degree in co-relation 306491. Up to 105949 conditions per place. [2022-12-13 19:07:25,442 INFO L137 encePairwiseOnDemand]: 365/369 looper letters, 120 selfloop transitions, 6 changer transitions 0/141 dead transitions. [2022-12-13 19:07:25,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 141 transitions, 580 flow [2022-12-13 19:07:25,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:07:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 19:07:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1167 transitions. [2022-12-13 19:07:25,445 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5271002710027101 [2022-12-13 19:07:25,445 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1167 transitions. [2022-12-13 19:07:25,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1167 transitions. [2022-12-13 19:07:25,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 19:07:25,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1167 transitions. [2022-12-13 19:07:25,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 194.5) internal successors, (1167), 6 states have internal predecessors, (1167), 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) [2022-12-13 19:07:25,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 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) [2022-12-13 19:07:25,450 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 369.0) internal successors, (2583), 7 states have internal predecessors, (2583), 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) [2022-12-13 19:07:25,450 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 156 flow. Second operand 6 states and 1167 transitions. [2022-12-13 19:07:25,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 141 transitions, 580 flow [2022-12-13 19:07:25,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 141 transitions, 566 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 19:07:25,462 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2022-12-13 19:07:25,462 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=369, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 19:07:25,463 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2022-12-13 19:07:25,463 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2022-12-13 19:07:25,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 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) [2022-12-13 19:07:25,463 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:07:25,464 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 19:07:25,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:07:25,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6fe2d129-a9ad-4493-9944-49a6de83eefb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:07:25,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:07:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:07:25,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1750142858, now seen corresponding path program 1 times [2022-12-13 19:07:25,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:07:25,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918197861] [2022-12-13 19:07:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:07:25,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:07:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:07:25,701 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 19:07:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 19:07:25,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 19:07:25,712 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 19:07:25,712 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 19:07:25,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 19:07:25,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 19:07:25,712 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 19:07:25,712 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 19:07:25,712 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 19:07:25,728 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 19:07:25,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 246 transitions, 552 flow [2022-12-13 19:07:25,818 INFO L130 PetriNetUnfolder]: 158/946 cut-off events. [2022-12-13 19:07:25,819 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 19:07:25,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 946 events. 158/946 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4141 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 650. Up to 80 conditions per place. [2022-12-13 19:07:25,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 214 places, 246 transitions, 552 flow [2022-12-13 19:07:25,827 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 214 places, 246 transitions, 552 flow [2022-12-13 19:07:25,827 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 19:07:25,827 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 214 places, 246 transitions, 552 flow [2022-12-13 19:07:25,827 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 214 places, 246 transitions, 552 flow [2022-12-13 19:07:25,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 214 places, 246 transitions, 552 flow [2022-12-13 19:07:25,915 INFO L130 PetriNetUnfolder]: 158/946 cut-off events. [2022-12-13 19:07:25,915 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 19:07:25,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 946 events. 158/946 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4141 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 650. Up to 80 conditions per place. [2022-12-13 19:07:25,939 INFO L119 LiptonReduction]: Number of co-enabled transitions 32760 [2022-12-13 19:07:28,413 INFO L134 LiptonReduction]: Checked pairs total: 100257 [2022-12-13 19:07:28,413 INFO L136 LiptonReduction]: Total number of compositions: 168 [2022-12-13 19:07:28,414 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:07:28,414 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;@218dc11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:07:28,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 19:07:28,415 INFO L130 PetriNetUnfolder]: 1/12 cut-off events. [2022-12-13 19:07:28,415 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 19:07:28,415 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 19:07:28,416 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 19:07:28,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 19:07:28,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:07:28,416 INFO L85 PathProgramCache]: Analyzing trace with hash 61284301, now seen corresponding path program 1 times [2022-12-13 19:07:28,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:07:28,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934707878] [2022-12-13 19:07:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:07:28,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:07:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:07:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:07:28,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:07:28,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934707878] [2022-12-13 19:07:28,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934707878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:07:28,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:07:28,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:07:28,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748152519] [2022-12-13 19:07:28,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:07:28,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:07:28,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:07:28,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:07:28,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:07:28,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 414 [2022-12-13 19:07:28,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 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) [2022-12-13 19:07:28,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 19:07:28,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 414 [2022-12-13 19:07:28,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand