./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 8d7df89eaaa05ee1c4077455abbd501c07d86257ca2c037ce71ae27b3838effb --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 09:21:08,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 09:21:08,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 09:21:08,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 09:21:08,228 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 09:21:08,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 09:21:08,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 09:21:08,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 09:21:08,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 09:21:08,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 09:21:08,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 09:21:08,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 09:21:08,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 09:21:08,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 09:21:08,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 09:21:08,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 09:21:08,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 09:21:08,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 09:21:08,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 09:21:08,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 09:21:08,270 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 09:21:08,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 09:21:08,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 09:21:08,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 09:21:08,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 09:21:08,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 09:21:08,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 09:21:08,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 09:21:08,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 09:21:08,278 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 09:21:08,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 09:21:08,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 09:21:08,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 09:21:08,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 09:21:08,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 09:21:08,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 09:21:08,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 09:21:08,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 09:21:08,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 09:21:08,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 09:21:08,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 09:21:08,286 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 09:21:08,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 09:21:08,314 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 09:21:08,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 09:21:08,314 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 09:21:08,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 09:21:08,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 09:21:08,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 09:21:08,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 09:21:08,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 09:21:08,316 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 09:21:08,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 09:21:08,317 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 09:21:08,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 09:21:08,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 09:21:08,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 09:21:08,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 09:21:08,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 09:21:08,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 09:21:08,319 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 09:21:08,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 09:21:08,319 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 09:21:08,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 09:21:08,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 09:21:08,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 09:21:08,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 09:21:08,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:21:08,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 09:21:08,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 09:21:08,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 09:21:08,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 09:21:08,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 09:21:08,321 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 09:21:08,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 09:21:08,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 09:21:08,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d7df89eaaa05ee1c4077455abbd501c07d86257ca2c037ce71ae27b3838effb [2022-07-21 09:21:08,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 09:21:08,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 09:21:08,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 09:21:08,655 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 09:21:08,656 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 09:21:08,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i [2022-07-21 09:21:08,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d060895e1/db64bba2e7da424a91922a5362e291bd/FLAG30200901d [2022-07-21 09:21:09,148 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 09:21:09,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i [2022-07-21 09:21:09,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d060895e1/db64bba2e7da424a91922a5362e291bd/FLAG30200901d [2022-07-21 09:21:09,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d060895e1/db64bba2e7da424a91922a5362e291bd [2022-07-21 09:21:09,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 09:21:09,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 09:21:09,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 09:21:09,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 09:21:09,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 09:21:09,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a312ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09, skipping insertion in model container [2022-07-21 09:21:09,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 09:21:09,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 09:21:09,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i[30190,30203] [2022-07-21 09:21:09,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:21:09,603 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 09:21:09,646 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/reorder_c11_bad-30.i[30190,30203] [2022-07-21 09:21:09,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 09:21:09,692 INFO L208 MainTranslator]: Completed translation [2022-07-21 09:21:09,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09 WrapperNode [2022-07-21 09:21:09,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 09:21:09,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 09:21:09,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 09:21:09,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 09:21:09,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,739 INFO L137 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-07-21 09:21:09,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 09:21:09,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 09:21:09,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 09:21:09,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 09:21:09,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 09:21:09,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 09:21:09,795 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 09:21:09,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 09:21:09,796 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (1/1) ... [2022-07-21 09:21:09,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 09:21:09,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:09,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 09:21:09,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 09:21:09,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 09:21:09,849 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-07-21 09:21:09,849 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-07-21 09:21:09,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 09:21:09,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 09:21:09,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 09:21:09,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 09:21:09,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 09:21:09,850 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-07-21 09:21:09,850 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-07-21 09:21:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 09:21:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 09:21:09,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 09:21:09,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 09:21:09,852 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 09:21:09,947 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 09:21:09,948 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 09:21:10,202 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 09:21:10,207 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 09:21:10,208 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 09:21:10,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:21:10 BoogieIcfgContainer [2022-07-21 09:21:10,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 09:21:10,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 09:21:10,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 09:21:10,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 09:21:10,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:21:09" (1/3) ... [2022-07-21 09:21:10,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17edcae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:21:10, skipping insertion in model container [2022-07-21 09:21:10,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:21:09" (2/3) ... [2022-07-21 09:21:10,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17edcae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:21:10, skipping insertion in model container [2022-07-21 09:21:10,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:21:10" (3/3) ... [2022-07-21 09:21:10,217 INFO L111 eAbstractionObserver]: Analyzing ICFG reorder_c11_bad-30.i [2022-07-21 09:21:10,222 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 09:21:10,230 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 09:21:10,230 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 09:21:10,230 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 09:21:10,306 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 09:21:10,346 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 91 transitions, 204 flow [2022-07-21 09:21:10,410 INFO L129 PetriNetUnfolder]: 24/202 cut-off events. [2022-07-21 09:21:10,411 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-21 09:21:10,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 202 events. 24/202 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 627 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2022-07-21 09:21:10,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 91 transitions, 204 flow [2022-07-21 09:21:10,429 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 89 transitions, 194 flow [2022-07-21 09:21:10,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:21:10,449 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44bba731, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@660e61f7 [2022-07-21 09:21:10,449 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-21 09:21:10,463 INFO L129 PetriNetUnfolder]: 5/66 cut-off events. [2022-07-21 09:21:10,463 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:21:10,463 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:10,464 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:10,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:21:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -211201094, now seen corresponding path program 1 times [2022-07-21 09:21:10,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:10,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568606309] [2022-07-21 09:21:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:10,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:10,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:10,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568606309] [2022-07-21 09:21:10,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568606309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:10,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:10,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:21:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032172278] [2022-07-21 09:21:10,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:10,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:21:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:21:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:21:10,664 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 91 [2022-07-21 09:21:10,666 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 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) [2022-07-21 09:21:10,667 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:10,667 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 91 [2022-07-21 09:21:10,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:10,727 INFO L129 PetriNetUnfolder]: 4/172 cut-off events. [2022-07-21 09:21:10,727 INFO L130 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2022-07-21 09:21:10,728 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 172 events. 4/172 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 546 event pairs, 0 based on Foata normal form. 18/174 useless extension candidates. Maximal degree in co-relation 104. Up to 8 conditions per place. [2022-07-21 09:21:10,729 INFO L132 encePairwiseOnDemand]: 86/91 looper letters, 4 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2022-07-21 09:21:10,729 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 83 transitions, 190 flow [2022-07-21 09:21:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:21:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:21:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 167 transitions. [2022-07-21 09:21:10,741 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9175824175824175 [2022-07-21 09:21:10,742 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 167 transitions. [2022-07-21 09:21:10,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 167 transitions. [2022-07-21 09:21:10,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:10,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 167 transitions. [2022-07-21 09:21:10,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 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) [2022-07-21 09:21:10,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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) [2022-07-21 09:21:10,750 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 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) [2022-07-21 09:21:10,752 INFO L186 Difference]: Start difference. First operand has 87 places, 89 transitions, 194 flow. Second operand 2 states and 167 transitions. [2022-07-21 09:21:10,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 83 transitions, 190 flow [2022-07-21 09:21:10,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 83 transitions, 190 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:10,758 INFO L242 Difference]: Finished difference. Result has 87 places, 83 transitions, 182 flow [2022-07-21 09:21:10,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2022-07-21 09:21:10,764 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 0 predicate places. [2022-07-21 09:21:10,765 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 182 flow [2022-07-21 09:21:10,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 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) [2022-07-21 09:21:10,766 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:10,766 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:10,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 09:21:10,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:21:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash -407714599, now seen corresponding path program 1 times [2022-07-21 09:21:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:10,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495946736] [2022-07-21 09:21:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:10,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:10,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:10,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495946736] [2022-07-21 09:21:10,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495946736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:10,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:10,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:10,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002250932] [2022-07-21 09:21:10,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:10,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:10,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:10,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:10,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:10,851 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 91 [2022-07-21 09:21:10,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-07-21 09:21:10,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:10,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 91 [2022-07-21 09:21:10,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:10,901 INFO L129 PetriNetUnfolder]: 0/80 cut-off events. [2022-07-21 09:21:10,901 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 09:21:10,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 80 events. 0/80 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2022-07-21 09:21:10,902 INFO L132 encePairwiseOnDemand]: 80/91 looper letters, 24 selfloop transitions, 7 changer transitions 0/76 dead transitions. [2022-07-21 09:21:10,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 76 transitions, 227 flow [2022-07-21 09:21:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2022-07-21 09:21:10,905 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7216117216117216 [2022-07-21 09:21:10,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2022-07-21 09:21:10,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2022-07-21 09:21:10,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:10,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2022-07-21 09:21:10,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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) [2022-07-21 09:21:10,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-21 09:21:10,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 91.0) internal successors, (364), 4 states have internal predecessors, (364), 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) [2022-07-21 09:21:10,910 INFO L186 Difference]: Start difference. First operand has 87 places, 83 transitions, 182 flow. Second operand 3 states and 197 transitions. [2022-07-21 09:21:10,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 76 transitions, 227 flow [2022-07-21 09:21:10,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:10,917 INFO L242 Difference]: Finished difference. Result has 78 places, 70 transitions, 180 flow [2022-07-21 09:21:10,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2022-07-21 09:21:10,918 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, -9 predicate places. [2022-07-21 09:21:10,918 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 180 flow [2022-07-21 09:21:10,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2022-07-21 09:21:10,918 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:10,919 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:10,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 09:21:10,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-21 09:21:10,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash -121871665, now seen corresponding path program 1 times [2022-07-21 09:21:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:10,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220266451] [2022-07-21 09:21:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:10,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:10,974 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:21:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:11,039 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:21:11,039 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:21:11,040 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-07-21 09:21:11,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-07-21 09:21:11,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-07-21 09:21:11,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-07-21 09:21:11,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 09:21:11,043 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 09:21:11,045 WARN L231 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:21:11,045 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-07-21 09:21:11,069 INFO L135 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-07-21 09:21:11,077 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 105 places, 110 transitions, 268 flow [2022-07-21 09:21:11,162 INFO L129 PetriNetUnfolder]: 107/656 cut-off events. [2022-07-21 09:21:11,162 INFO L130 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-07-21 09:21:11,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 753 conditions, 656 events. 107/656 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3182 event pairs, 2 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 395. Up to 32 conditions per place. [2022-07-21 09:21:11,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 110 transitions, 268 flow [2022-07-21 09:21:11,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 110 transitions, 268 flow [2022-07-21 09:21:11,176 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:21:11,181 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44bba731, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@660e61f7 [2022-07-21 09:21:11,181 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-07-21 09:21:11,186 INFO L129 PetriNetUnfolder]: 5/65 cut-off events. [2022-07-21 09:21:11,187 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:21:11,187 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:11,188 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:11,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:21:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash -537588368, now seen corresponding path program 1 times [2022-07-21 09:21:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:11,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737750686] [2022-07-21 09:21:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:11,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:11,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:11,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737750686] [2022-07-21 09:21:11,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737750686] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:11,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:11,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:11,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821273679] [2022-07-21 09:21:11,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:11,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:11,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:11,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:11,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:11,274 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 110 [2022-07-21 09:21:11,276 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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) [2022-07-21 09:21:11,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:11,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 110 [2022-07-21 09:21:11,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:11,445 INFO L129 PetriNetUnfolder]: 58/575 cut-off events. [2022-07-21 09:21:11,445 INFO L130 PetriNetUnfolder]: For 90/90 co-relation queries the response was YES. [2022-07-21 09:21:11,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 575 events. 58/575 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2884 event pairs, 0 based on Foata normal form. 244/783 useless extension candidates. Maximal degree in co-relation 505. Up to 207 conditions per place. [2022-07-21 09:21:11,448 INFO L132 encePairwiseOnDemand]: 92/110 looper letters, 53 selfloop transitions, 8 changer transitions 0/126 dead transitions. [2022-07-21 09:21:11,448 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 126 transitions, 446 flow [2022-07-21 09:21:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2022-07-21 09:21:11,453 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8242424242424242 [2022-07-21 09:21:11,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2022-07-21 09:21:11,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2022-07-21 09:21:11,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:11,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2022-07-21 09:21:11,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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) [2022-07-21 09:21:11,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2022-07-21 09:21:11,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2022-07-21 09:21:11,458 INFO L186 Difference]: Start difference. First operand has 105 places, 110 transitions, 268 flow. Second operand 3 states and 272 transitions. [2022-07-21 09:21:11,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 126 transitions, 446 flow [2022-07-21 09:21:11,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 126 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:11,467 INFO L242 Difference]: Finished difference. Result has 106 places, 106 transitions, 300 flow [2022-07-21 09:21:11,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=106, PETRI_TRANSITIONS=106} [2022-07-21 09:21:11,469 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, 1 predicate places. [2022-07-21 09:21:11,470 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 106 transitions, 300 flow [2022-07-21 09:21:11,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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) [2022-07-21 09:21:11,470 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:11,471 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:11,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 09:21:11,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:21:11,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash 853052668, now seen corresponding path program 1 times [2022-07-21 09:21:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:11,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345942304] [2022-07-21 09:21:11,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:11,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:11,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:11,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345942304] [2022-07-21 09:21:11,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345942304] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:11,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767379963] [2022-07-21 09:21:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:11,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:11,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:11,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 09:21:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:11,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:21:11,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:11,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:11,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767379963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:11,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:11,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 09:21:11,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645797924] [2022-07-21 09:21:11,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:21:11,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:11,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:21:11,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:21:11,776 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 110 [2022-07-21 09:21:11,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 106 transitions, 300 flow. Second operand has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 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) [2022-07-21 09:21:11,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:11,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 110 [2022-07-21 09:21:11,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:11,831 INFO L129 PetriNetUnfolder]: 0/57 cut-off events. [2022-07-21 09:21:11,832 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-07-21 09:21:11,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 57 events. 0/57 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 2/59 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2022-07-21 09:21:11,832 INFO L132 encePairwiseOnDemand]: 105/110 looper letters, 10 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2022-07-21 09:21:11,832 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 51 transitions, 156 flow [2022-07-21 09:21:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 09:21:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-07-21 09:21:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 586 transitions. [2022-07-21 09:21:11,835 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.591919191919192 [2022-07-21 09:21:11,835 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 586 transitions. [2022-07-21 09:21:11,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 586 transitions. [2022-07-21 09:21:11,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:11,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 586 transitions. [2022-07-21 09:21:11,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.11111111111111) internal successors, (586), 9 states have internal predecessors, (586), 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) [2022-07-21 09:21:11,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 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) [2022-07-21 09:21:11,840 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 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) [2022-07-21 09:21:11,840 INFO L186 Difference]: Start difference. First operand has 106 places, 106 transitions, 300 flow. Second operand 9 states and 586 transitions. [2022-07-21 09:21:11,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 51 transitions, 156 flow [2022-07-21 09:21:11,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 152 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:11,842 INFO L242 Difference]: Finished difference. Result has 61 places, 47 transitions, 124 flow [2022-07-21 09:21:11,842 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=124, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2022-07-21 09:21:11,843 INFO L279 CegarLoopForPetriNet]: 105 programPoint places, -44 predicate places. [2022-07-21 09:21:11,843 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 124 flow [2022-07-21 09:21:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 65.8) internal successors, (658), 10 states have internal predecessors, (658), 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) [2022-07-21 09:21:11,844 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:11,844 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:11,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:12,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:12,072 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-07-21 09:21:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1479036618, now seen corresponding path program 1 times [2022-07-21 09:21:12,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:12,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206861897] [2022-07-21 09:21:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:12,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:12,099 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:21:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:12,118 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:21:12,118 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:21:12,119 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-07-21 09:21:12,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-07-21 09:21:12,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2022-07-21 09:21:12,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-07-21 09:21:12,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-07-21 09:21:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 09:21:12,120 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-21 09:21:12,120 WARN L231 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:21:12,120 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-07-21 09:21:12,149 INFO L135 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-07-21 09:21:12,151 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 123 places, 129 transitions, 336 flow [2022-07-21 09:21:12,379 INFO L129 PetriNetUnfolder]: 496/2280 cut-off events. [2022-07-21 09:21:12,379 INFO L130 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-07-21 09:21:12,391 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2731 conditions, 2280 events. 496/2280 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 15128 event pairs, 64 based on Foata normal form. 0/1960 useless extension candidates. Maximal degree in co-relation 1399. Up to 192 conditions per place. [2022-07-21 09:21:12,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 129 transitions, 336 flow [2022-07-21 09:21:12,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 129 transitions, 336 flow [2022-07-21 09:21:12,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:21:12,403 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44bba731, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@660e61f7 [2022-07-21 09:21:12,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-07-21 09:21:12,408 INFO L129 PetriNetUnfolder]: 4/62 cut-off events. [2022-07-21 09:21:12,408 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:21:12,408 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:12,408 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:12,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 09:21:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1295698664, now seen corresponding path program 1 times [2022-07-21 09:21:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:12,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567052786] [2022-07-21 09:21:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:12,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567052786] [2022-07-21 09:21:12,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567052786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:12,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:12,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:21:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150373637] [2022-07-21 09:21:12,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:12,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:21:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:21:12,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:21:12,451 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 129 [2022-07-21 09:21:12,452 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 336 flow. Second operand has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 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) [2022-07-21 09:21:12,452 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:12,452 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 129 [2022-07-21 09:21:12,452 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:12,746 INFO L129 PetriNetUnfolder]: 336/2108 cut-off events. [2022-07-21 09:21:12,747 INFO L130 PetriNetUnfolder]: For 1217/1217 co-relation queries the response was YES. [2022-07-21 09:21:12,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2959 conditions, 2108 events. 336/2108 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 14809 event pairs, 32 based on Foata normal form. 358/2306 useless extension candidates. Maximal degree in co-relation 1473. Up to 400 conditions per place. [2022-07-21 09:21:12,759 INFO L132 encePairwiseOnDemand]: 122/129 looper letters, 18 selfloop transitions, 0 changer transitions 0/119 dead transitions. [2022-07-21 09:21:12,759 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 119 transitions, 352 flow [2022-07-21 09:21:12,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:21:12,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:21:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 227 transitions. [2022-07-21 09:21:12,761 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8798449612403101 [2022-07-21 09:21:12,761 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 227 transitions. [2022-07-21 09:21:12,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 227 transitions. [2022-07-21 09:21:12,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:12,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 227 transitions. [2022-07-21 09:21:12,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 113.5) internal successors, (227), 2 states have internal predecessors, (227), 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) [2022-07-21 09:21:12,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:12,763 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 09:21:12,764 INFO L186 Difference]: Start difference. First operand has 123 places, 129 transitions, 336 flow. Second operand 2 states and 227 transitions. [2022-07-21 09:21:12,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 119 transitions, 352 flow [2022-07-21 09:21:12,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 119 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:12,768 INFO L242 Difference]: Finished difference. Result has 121 places, 119 transitions, 316 flow [2022-07-21 09:21:12,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=316, PETRI_PLACES=121, PETRI_TRANSITIONS=119} [2022-07-21 09:21:12,769 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, -2 predicate places. [2022-07-21 09:21:12,769 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 119 transitions, 316 flow [2022-07-21 09:21:12,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.0) internal successors, (204), 2 states have internal predecessors, (204), 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) [2022-07-21 09:21:12,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:12,770 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:12,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 09:21:12,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 09:21:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:12,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1099185159, now seen corresponding path program 1 times [2022-07-21 09:21:12,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:12,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206362904] [2022-07-21 09:21:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:12,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:12,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:12,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206362904] [2022-07-21 09:21:12,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206362904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:12,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:12,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:12,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451935403] [2022-07-21 09:21:12,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:12,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:12,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:12,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:12,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:12,795 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 129 [2022-07-21 09:21:12,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 119 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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) [2022-07-21 09:21:12,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:12,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 129 [2022-07-21 09:21:12,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:13,280 INFO L129 PetriNetUnfolder]: 444/2469 cut-off events. [2022-07-21 09:21:13,280 INFO L130 PetriNetUnfolder]: For 592/592 co-relation queries the response was YES. [2022-07-21 09:21:13,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 2469 events. 444/2469 cut-off events. For 592/592 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 19458 event pairs, 10 based on Foata normal form. 0/2328 useless extension candidates. Maximal degree in co-relation 4682. Up to 1054 conditions per place. [2022-07-21 09:21:13,294 INFO L132 encePairwiseOnDemand]: 117/129 looper letters, 63 selfloop transitions, 8 changer transitions 0/147 dead transitions. [2022-07-21 09:21:13,294 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 147 transitions, 550 flow [2022-07-21 09:21:13,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2022-07-21 09:21:13,296 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7829457364341085 [2022-07-21 09:21:13,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2022-07-21 09:21:13,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2022-07-21 09:21:13,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:13,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2022-07-21 09:21:13,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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) [2022-07-21 09:21:13,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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) [2022-07-21 09:21:13,300 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 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) [2022-07-21 09:21:13,300 INFO L186 Difference]: Start difference. First operand has 121 places, 119 transitions, 316 flow. Second operand 3 states and 303 transitions. [2022-07-21 09:21:13,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 147 transitions, 550 flow [2022-07-21 09:21:13,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 147 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:13,308 INFO L242 Difference]: Finished difference. Result has 124 places, 123 transitions, 364 flow [2022-07-21 09:21:13,308 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=124, PETRI_TRANSITIONS=123} [2022-07-21 09:21:13,310 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 1 predicate places. [2022-07-21 09:21:13,310 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 123 transitions, 364 flow [2022-07-21 09:21:13,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 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) [2022-07-21 09:21:13,310 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:13,310 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:13,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 09:21:13,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 09:21:13,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash -524673210, now seen corresponding path program 1 times [2022-07-21 09:21:13,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:13,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604414125] [2022-07-21 09:21:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:13,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:13,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604414125] [2022-07-21 09:21:13,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604414125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:13,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407618089] [2022-07-21 09:21:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:13,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:13,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:13,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:13,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 09:21:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:21:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:13,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:13,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407618089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:13,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:13,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 09:21:13,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033161903] [2022-07-21 09:21:13,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:13,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:21:13,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:13,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:21:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:21:13,540 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2022-07-21 09:21:13,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 123 transitions, 364 flow. Second operand has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 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) [2022-07-21 09:21:13,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:13,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2022-07-21 09:21:13,541 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:14,074 INFO L129 PetriNetUnfolder]: 423/2263 cut-off events. [2022-07-21 09:21:14,075 INFO L130 PetriNetUnfolder]: For 683/683 co-relation queries the response was YES. [2022-07-21 09:21:14,082 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 2263 events. 423/2263 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 17592 event pairs, 35 based on Foata normal form. 2/2262 useless extension candidates. Maximal degree in co-relation 4761. Up to 482 conditions per place. [2022-07-21 09:21:14,091 INFO L132 encePairwiseOnDemand]: 114/129 looper letters, 59 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2022-07-21 09:21:14,092 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 154 transitions, 624 flow [2022-07-21 09:21:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:21:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:21:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 822 transitions. [2022-07-21 09:21:14,095 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6372093023255814 [2022-07-21 09:21:14,095 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 822 transitions. [2022-07-21 09:21:14,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 822 transitions. [2022-07-21 09:21:14,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:14,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 822 transitions. [2022-07-21 09:21:14,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 82.2) internal successors, (822), 10 states have internal predecessors, (822), 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) [2022-07-21 09:21:14,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 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) [2022-07-21 09:21:14,101 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 129.0) internal successors, (1419), 11 states have internal predecessors, (1419), 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) [2022-07-21 09:21:14,101 INFO L186 Difference]: Start difference. First operand has 124 places, 123 transitions, 364 flow. Second operand 10 states and 822 transitions. [2022-07-21 09:21:14,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 154 transitions, 624 flow [2022-07-21 09:21:14,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 154 transitions, 616 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:14,107 INFO L242 Difference]: Finished difference. Result has 135 places, 132 transitions, 456 flow [2022-07-21 09:21:14,108 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=456, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2022-07-21 09:21:14,109 INFO L279 CegarLoopForPetriNet]: 123 programPoint places, 12 predicate places. [2022-07-21 09:21:14,110 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 456 flow [2022-07-21 09:21:14,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 76.8) internal successors, (768), 10 states have internal predecessors, (768), 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) [2022-07-21 09:21:14,110 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:14,111 INFO L200 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:14,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 09:21:14,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-21 09:21:14,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-07-21 09:21:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:14,326 INFO L85 PathProgramCache]: Analyzing trace with hash 531540147, now seen corresponding path program 1 times [2022-07-21 09:21:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:14,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030578983] [2022-07-21 09:21:14,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:14,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:14,361 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 09:21:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 09:21:14,391 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 09:21:14,392 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 09:21:14,393 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-07-21 09:21:14,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-07-21 09:21:14,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2022-07-21 09:21:14,393 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-07-21 09:21:14,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-07-21 09:21:14,394 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-07-21 09:21:14,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 09:21:14,394 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-07-21 09:21:14,395 WARN L231 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-07-21 09:21:14,395 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-07-21 09:21:14,431 INFO L135 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-07-21 09:21:14,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 141 places, 148 transitions, 408 flow [2022-07-21 09:21:15,508 INFO L129 PetriNetUnfolder]: 2379/8746 cut-off events. [2022-07-21 09:21:15,508 INFO L130 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-07-21 09:21:15,567 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10911 conditions, 8746 events. 2379/8746 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 74995 event pairs, 626 based on Foata normal form. 0/7622 useless extension candidates. Maximal degree in co-relation 5388. Up to 1024 conditions per place. [2022-07-21 09:21:15,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 148 transitions, 408 flow [2022-07-21 09:21:15,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 148 transitions, 408 flow [2022-07-21 09:21:15,611 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 09:21:15,612 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44bba731, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@660e61f7 [2022-07-21 09:21:15,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 09:21:15,615 INFO L129 PetriNetUnfolder]: 6/68 cut-off events. [2022-07-21 09:21:15,615 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 09:21:15,616 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:15,616 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:15,616 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 09:21:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 404176023, now seen corresponding path program 1 times [2022-07-21 09:21:15,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:15,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731723453] [2022-07-21 09:21:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:15,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:15,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731723453] [2022-07-21 09:21:15,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731723453] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:15,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:15,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 09:21:15,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850111689] [2022-07-21 09:21:15,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:15,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 09:21:15,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:15,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 09:21:15,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 09:21:15,634 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 148 [2022-07-21 09:21:15,634 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 148 transitions, 408 flow. Second operand has 2 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 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) [2022-07-21 09:21:15,634 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:15,634 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 148 [2022-07-21 09:21:15,634 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:16,682 INFO L129 PetriNetUnfolder]: 1817/8164 cut-off events. [2022-07-21 09:21:16,683 INFO L130 PetriNetUnfolder]: For 6300/6300 co-relation queries the response was YES. [2022-07-21 09:21:16,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12402 conditions, 8164 events. 1817/8164 cut-off events. For 6300/6300 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 74601 event pairs, 313 based on Foata normal form. 1608/9210 useless extension candidates. Maximal degree in co-relation 5991. Up to 2073 conditions per place. [2022-07-21 09:21:16,747 INFO L132 encePairwiseOnDemand]: 140/148 looper letters, 24 selfloop transitions, 0 changer transitions 0/136 dead transitions. [2022-07-21 09:21:16,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 136 transitions, 432 flow [2022-07-21 09:21:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 09:21:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-21 09:21:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 256 transitions. [2022-07-21 09:21:16,749 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8648648648648649 [2022-07-21 09:21:16,749 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 256 transitions. [2022-07-21 09:21:16,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 256 transitions. [2022-07-21 09:21:16,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:16,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 256 transitions. [2022-07-21 09:21:16,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 128.0) internal successors, (256), 2 states have internal predecessors, (256), 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) [2022-07-21 09:21:16,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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) [2022-07-21 09:21:16,752 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 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) [2022-07-21 09:21:16,752 INFO L186 Difference]: Start difference. First operand has 141 places, 148 transitions, 408 flow. Second operand 2 states and 256 transitions. [2022-07-21 09:21:16,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 136 transitions, 432 flow [2022-07-21 09:21:16,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 136 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:16,756 INFO L242 Difference]: Finished difference. Result has 138 places, 136 transitions, 384 flow [2022-07-21 09:21:16,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=384, PETRI_PLACES=138, PETRI_TRANSITIONS=136} [2022-07-21 09:21:16,758 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, -3 predicate places. [2022-07-21 09:21:16,758 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 136 transitions, 384 flow [2022-07-21 09:21:16,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 113.0) internal successors, (226), 2 states have internal predecessors, (226), 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) [2022-07-21 09:21:16,758 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:16,758 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:16,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 09:21:16,759 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 09:21:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:16,759 INFO L85 PathProgramCache]: Analyzing trace with hash 207662518, now seen corresponding path program 1 times [2022-07-21 09:21:16,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:16,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019034117] [2022-07-21 09:21:16,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:16,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:16,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:16,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019034117] [2022-07-21 09:21:16,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019034117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:16,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:16,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 09:21:16,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685691689] [2022-07-21 09:21:16,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:16,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 09:21:16,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:16,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 09:21:16,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 09:21:16,781 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 148 [2022-07-21 09:21:16,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 136 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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) [2022-07-21 09:21:16,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:16,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 148 [2022-07-21 09:21:16,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:18,050 INFO L129 PetriNetUnfolder]: 2570/10361 cut-off events. [2022-07-21 09:21:18,051 INFO L130 PetriNetUnfolder]: For 3152/3152 co-relation queries the response was YES. [2022-07-21 09:21:18,089 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20629 conditions, 10361 events. 2570/10361 cut-off events. For 3152/3152 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 102844 event pairs, 152 based on Foata normal form. 0/9823 useless extension candidates. Maximal degree in co-relation 20618. Up to 4843 conditions per place. [2022-07-21 09:21:18,129 INFO L132 encePairwiseOnDemand]: 136/148 looper letters, 73 selfloop transitions, 8 changer transitions 0/168 dead transitions. [2022-07-21 09:21:18,129 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 168 transitions, 658 flow [2022-07-21 09:21:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 09:21:18,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 09:21:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2022-07-21 09:21:18,131 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7792792792792793 [2022-07-21 09:21:18,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2022-07-21 09:21:18,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2022-07-21 09:21:18,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:18,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2022-07-21 09:21:18,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 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) [2022-07-21 09:21:18,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2022-07-21 09:21:18,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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) [2022-07-21 09:21:18,134 INFO L186 Difference]: Start difference. First operand has 138 places, 136 transitions, 384 flow. Second operand 3 states and 346 transitions. [2022-07-21 09:21:18,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 168 transitions, 658 flow [2022-07-21 09:21:18,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 168 transitions, 658 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 09:21:18,141 INFO L242 Difference]: Finished difference. Result has 141 places, 140 transitions, 432 flow [2022-07-21 09:21:18,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=141, PETRI_TRANSITIONS=140} [2022-07-21 09:21:18,142 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 0 predicate places. [2022-07-21 09:21:18,143 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 140 transitions, 432 flow [2022-07-21 09:21:18,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 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) [2022-07-21 09:21:18,143 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:18,143 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:18,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 09:21:18,144 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 09:21:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:18,145 INFO L85 PathProgramCache]: Analyzing trace with hash 676761736, now seen corresponding path program 1 times [2022-07-21 09:21:18,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:18,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283287667] [2022-07-21 09:21:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:18,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:18,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:18,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283287667] [2022-07-21 09:21:18,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283287667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 09:21:18,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2915620] [2022-07-21 09:21:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:18,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:18,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 09:21:18,184 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 09:21:18,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 09:21:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-21 09:21:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 09:21:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 09:21:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 09:21:18,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2915620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 09:21:18,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 09:21:18,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-21 09:21:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800227614] [2022-07-21 09:21:18,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 09:21:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 09:21:18,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 09:21:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-21 09:21:18,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 148 [2022-07-21 09:21:18,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 140 transitions, 432 flow. Second operand has 10 states, 10 states have (on average 87.8) internal successors, (878), 10 states have internal predecessors, (878), 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) [2022-07-21 09:21:18,349 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:18,349 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 148 [2022-07-21 09:21:18,349 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 09:21:19,793 INFO L129 PetriNetUnfolder]: 2538/10077 cut-off events. [2022-07-21 09:21:19,793 INFO L130 PetriNetUnfolder]: For 3601/3601 co-relation queries the response was YES. [2022-07-21 09:21:19,828 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21963 conditions, 10077 events. 2538/10077 cut-off events. For 3601/3601 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 103177 event pairs, 214 based on Foata normal form. 2/10071 useless extension candidates. Maximal degree in co-relation 21950. Up to 2161 conditions per place. [2022-07-21 09:21:19,867 INFO L132 encePairwiseOnDemand]: 133/148 looper letters, 69 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2022-07-21 09:21:19,867 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 175 transitions, 732 flow [2022-07-21 09:21:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 09:21:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-21 09:21:19,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 942 transitions. [2022-07-21 09:21:19,870 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6364864864864865 [2022-07-21 09:21:19,870 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 942 transitions. [2022-07-21 09:21:19,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 942 transitions. [2022-07-21 09:21:19,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 09:21:19,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 942 transitions. [2022-07-21 09:21:19,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.2) internal successors, (942), 10 states have internal predecessors, (942), 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) [2022-07-21 09:21:19,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 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) [2022-07-21 09:21:19,877 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 148.0) internal successors, (1628), 11 states have internal predecessors, (1628), 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) [2022-07-21 09:21:19,878 INFO L186 Difference]: Start difference. First operand has 141 places, 140 transitions, 432 flow. Second operand 10 states and 942 transitions. [2022-07-21 09:21:19,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 175 transitions, 732 flow [2022-07-21 09:21:19,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 175 transitions, 724 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-21 09:21:19,891 INFO L242 Difference]: Finished difference. Result has 152 places, 149 transitions, 524 flow [2022-07-21 09:21:19,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=524, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2022-07-21 09:21:19,893 INFO L279 CegarLoopForPetriNet]: 141 programPoint places, 11 predicate places. [2022-07-21 09:21:19,893 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 524 flow [2022-07-21 09:21:19,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 87.8) internal successors, (878), 10 states have internal predecessors, (878), 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) [2022-07-21 09:21:19,894 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 09:21:19,894 INFO L200 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 09:21:19,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 09:21:20,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 09:21:20,119 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkThreadErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-21 09:21:20,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 09:21:20,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1377560969, now seen corresponding path program 1 times [2022-07-21 09:21:20,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 09:21:20,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500531121] [2022-07-21 09:21:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 09:21:20,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 09:21:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 09:21:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-21 09:21:20,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 09:21:20,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500531121] [2022-07-21 09:21:20,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500531121] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 09:21:20,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 09:21:20,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 09:21:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833920716] [2022-07-21 09:21:20,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 09:21:20,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 09:21:20,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 09:21:20,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 09:21:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 09:21:20,197 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 148 [2022-07-21 09:21:20,198 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 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) [2022-07-21 09:21:20,198 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 09:21:20,198 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 148 [2022-07-21 09:21:20,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand