./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/weaver/popl20-bad-ring.wvr.c -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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 15:19:50,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:19:50,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:19:50,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:19:50,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:19:50,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:19:50,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:19:50,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:19:50,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:19:50,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:19:50,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:19:50,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:19:50,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:19:50,351 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:19:50,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:19:50,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:19:50,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:19:50,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:19:50,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:19:50,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:19:50,365 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:19:50,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:19:50,366 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:19:50,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:19:50,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:19:50,373 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:19:50,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:19:50,374 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:19:50,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:19:50,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:19:50,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:19:50,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:19:50,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:19:50,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:19:50,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:19:50,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:19:50,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:19:50,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:19:50,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:19:50,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:19:50,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:19:50,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:19:50,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:19:50,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:19:50,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:19:50,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:19:50,400 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:19:50,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:19:50,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:19:50,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:19:50,401 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:19:50,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:19:50,401 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:19:50,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:19:50,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:19:50,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:19:50,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:19:50,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:19:50,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:19:50,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:19:50,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:19:50,403 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:19:50,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:19:50,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:19:50,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:19:50,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:19:50,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:19:50,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:19:50,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:19:50,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:19:50,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:19:50,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:19:50,404 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:19:50,404 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:19:50,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:19:50,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:19:50,405 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2021-12-21 15:19:50,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:19:50,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:19:50,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:19:50,616 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:19:50,617 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:19:50,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-12-21 15:19:50,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8853476/4423072a62494f15822b3ed5d8127618/FLAG0f45f47b3 [2021-12-21 15:19:51,133 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:19:51,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2021-12-21 15:19:51,140 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8853476/4423072a62494f15822b3ed5d8127618/FLAG0f45f47b3 [2021-12-21 15:19:51,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c8853476/4423072a62494f15822b3ed5d8127618 [2021-12-21 15:19:51,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:19:51,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:19:51,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:19:51,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:19:51,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:19:51,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c1523b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51, skipping insertion in model container [2021-12-21 15:19:51,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:19:51,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:19:51,777 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/weaver/popl20-bad-ring.wvr.c[3947,3960] [2021-12-21 15:19:51,799 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:19:51,815 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:19:51,868 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/weaver/popl20-bad-ring.wvr.c[3947,3960] [2021-12-21 15:19:51,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:19:51,887 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:19:51,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51 WrapperNode [2021-12-21 15:19:51,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:19:51,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:19:51,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:19:51,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:19:51,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,947 INFO L137 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2021-12-21 15:19:51,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:19:51,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:19:51,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:19:51,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:19:51,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:51,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:19:51,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:19:51,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:19:51,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:19:51,996 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (1/1) ... [2021-12-21 15:19:52,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:19:52,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:19:52,019 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) [2021-12-21 15:19:52,035 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 [2021-12-21 15:19:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:19:52,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:19:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:19:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:19:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:19:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:19:52,049 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:19:52,049 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:19:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-21 15:19:52,050 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-21 15:19:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:19:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-21 15:19:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-21 15:19:52,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 15:19:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:19:52,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:19:52,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:19:52,052 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:19:52,117 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:19:52,118 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:19:52,424 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:19:52,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:19:52,557 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-21 15:19:52,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:19:52 BoogieIcfgContainer [2021-12-21 15:19:52,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:19:52,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:19:52,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:19:52,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:19:52,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:19:51" (1/3) ... [2021-12-21 15:19:52,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5053d708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:19:52, skipping insertion in model container [2021-12-21 15:19:52,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:19:51" (2/3) ... [2021-12-21 15:19:52,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5053d708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:19:52, skipping insertion in model container [2021-12-21 15:19:52,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:19:52" (3/3) ... [2021-12-21 15:19:52,576 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2021-12-21 15:19:52,581 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:19:52,581 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:19:52,581 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:19:52,581 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:19:52,639 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,640 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,640 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,641 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,642 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,643 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,643 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,643 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,643 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,643 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,645 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,646 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,647 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,648 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,648 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,648 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,648 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,649 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,649 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,649 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,649 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,650 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,650 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,650 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,650 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,650 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,650 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,651 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,651 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,651 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,651 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,651 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,652 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,652 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,652 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,653 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,653 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,653 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,653 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,653 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,654 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,654 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,654 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,654 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,655 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,655 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,655 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,656 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,656 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,656 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,657 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,657 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,657 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,657 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,658 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,659 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,659 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,659 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,659 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,659 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,660 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,661 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,662 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,662 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,663 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,664 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,664 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,664 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,664 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,667 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,668 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,669 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,669 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,670 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,670 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,670 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,670 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,670 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,670 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,671 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,672 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,673 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,673 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,673 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,673 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,673 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,674 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,674 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,674 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,674 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,674 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,674 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,675 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,676 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,676 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,676 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,676 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~short13#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post11#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~j~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,681 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,682 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_~s~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,682 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem12#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,682 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,682 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem10#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,684 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,684 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,684 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,684 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,685 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,685 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,685 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~short18#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,685 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post16#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,685 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~k~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,685 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem17#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,685 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem15#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,686 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,686 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_~t~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~short8#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~l~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_~i~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,687 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,688 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:19:52,691 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-21 15:19:52,727 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:19:52,733 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:19:52,734 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-21 15:19:52,746 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2021-12-21 15:19:52,812 INFO L129 PetriNetUnfolder]: 22/264 cut-off events. [2021-12-21 15:19:52,812 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:19:52,815 INFO L84 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 157 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2021-12-21 15:19:52,815 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2021-12-21 15:19:52,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2021-12-21 15:19:52,849 INFO L129 PetriNetUnfolder]: 22/252 cut-off events. [2021-12-21 15:19:52,849 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-21 15:19:52,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:52,850 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:52,850 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash 956219309, now seen corresponding path program 1 times [2021-12-21 15:19:52,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:52,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566125915] [2021-12-21 15:19:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:52,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:53,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:53,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566125915] [2021-12-21 15:19:53,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566125915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:53,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:53,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:19:53,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178190248] [2021-12-21 15:19:53,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:53,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:19:53,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:53,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:19:53,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:19:53,066 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 267 [2021-12-21 15:19:53,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 253 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 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) [2021-12-21 15:19:53,073 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:53,073 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 267 [2021-12-21 15:19:53,074 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:53,164 INFO L129 PetriNetUnfolder]: 137/624 cut-off events. [2021-12-21 15:19:53,164 INFO L130 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2021-12-21 15:19:53,166 INFO L84 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 624 events. 137/624 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2446 event pairs, 74 based on Foata normal form. 97/655 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2021-12-21 15:19:53,169 INFO L132 encePairwiseOnDemand]: 251/267 looper letters, 13 selfloop transitions, 0 changer transitions 8/237 dead transitions. [2021-12-21 15:19:53,169 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 518 flow [2021-12-21 15:19:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:19:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:19:53,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2021-12-21 15:19:53,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9419475655430711 [2021-12-21 15:19:53,178 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2021-12-21 15:19:53,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2021-12-21 15:19:53,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:53,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2021-12-21 15:19:53,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 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) [2021-12-21 15:19:53,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 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) [2021-12-21 15:19:53,188 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 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) [2021-12-21 15:19:53,189 INFO L186 Difference]: Start difference. First operand has 241 places, 253 transitions, 524 flow. Second operand 2 states and 503 transitions. [2021-12-21 15:19:53,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 518 flow [2021-12-21 15:19:53,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-12-21 15:19:53,208 INFO L242 Difference]: Finished difference. Result has 236 places, 229 transitions, 464 flow [2021-12-21 15:19:53,209 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=464, PETRI_PLACES=236, PETRI_TRANSITIONS=229} [2021-12-21 15:19:53,212 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -5 predicate places. [2021-12-21 15:19:53,212 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 229 transitions, 464 flow [2021-12-21 15:19:53,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 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) [2021-12-21 15:19:53,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:53,213 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:53,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:19:53,213 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:53,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1907627099, now seen corresponding path program 1 times [2021-12-21 15:19:53,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:53,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556091892] [2021-12-21 15:19:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:53,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:53,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:53,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556091892] [2021-12-21 15:19:53,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556091892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:53,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:53,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:19:53,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052756590] [2021-12-21 15:19:53,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:53,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:19:53,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:19:53,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:19:53,366 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2021-12-21 15:19:53,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 229 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 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) [2021-12-21 15:19:53,367 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:53,367 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2021-12-21 15:19:53,367 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:53,436 INFO L129 PetriNetUnfolder]: 125/535 cut-off events. [2021-12-21 15:19:53,436 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-12-21 15:19:53,437 INFO L84 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 535 events. 125/535 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1784 event pairs, 29 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 745. Up to 142 conditions per place. [2021-12-21 15:19:53,438 INFO L132 encePairwiseOnDemand]: 264/267 looper letters, 22 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2021-12-21 15:19:53,439 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 236 transitions, 528 flow [2021-12-21 15:19:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:19:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:19:53,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2021-12-21 15:19:53,441 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9038701622971286 [2021-12-21 15:19:53,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2021-12-21 15:19:53,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2021-12-21 15:19:53,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:53,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2021-12-21 15:19:53,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 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) [2021-12-21 15:19:53,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 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) [2021-12-21 15:19:53,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 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) [2021-12-21 15:19:53,445 INFO L186 Difference]: Start difference. First operand has 236 places, 229 transitions, 464 flow. Second operand 3 states and 724 transitions. [2021-12-21 15:19:53,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 236 transitions, 528 flow [2021-12-21 15:19:53,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 236 transitions, 528 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:19:53,449 INFO L242 Difference]: Finished difference. Result has 231 places, 230 transitions, 476 flow [2021-12-21 15:19:53,450 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2021-12-21 15:19:53,450 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -10 predicate places. [2021-12-21 15:19:53,451 INFO L470 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 476 flow [2021-12-21 15:19:53,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 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) [2021-12-21 15:19:53,451 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:53,451 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:53,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:19:53,452 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:53,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -104740663, now seen corresponding path program 2 times [2021-12-21 15:19:53,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883262658] [2021-12-21 15:19:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:53,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:53,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:19:53,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:53,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883262658] [2021-12-21 15:19:53,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883262658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:53,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:53,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:19:53,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890861264] [2021-12-21 15:19:53,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:53,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:19:53,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:53,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:19:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:19:53,586 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-21 15:19:53,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 476 flow. Second operand has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:53,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:53,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-21 15:19:53,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:53,740 INFO L129 PetriNetUnfolder]: 152/705 cut-off events. [2021-12-21 15:19:53,740 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2021-12-21 15:19:53,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 705 events. 152/705 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2617 event pairs, 84 based on Foata normal form. 9/664 useless extension candidates. Maximal degree in co-relation 1087. Up to 210 conditions per place. [2021-12-21 15:19:53,745 INFO L132 encePairwiseOnDemand]: 257/267 looper letters, 48 selfloop transitions, 8 changer transitions 21/255 dead transitions. [2021-12-21 15:19:53,745 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 255 transitions, 684 flow [2021-12-21 15:19:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:19:53,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:19:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1868 transitions. [2021-12-21 15:19:53,748 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7773616312942155 [2021-12-21 15:19:53,748 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1868 transitions. [2021-12-21 15:19:53,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1868 transitions. [2021-12-21 15:19:53,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:53,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1868 transitions. [2021-12-21 15:19:53,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.55555555555554) internal successors, (1868), 9 states have internal predecessors, (1868), 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) [2021-12-21 15:19:53,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 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) [2021-12-21 15:19:53,757 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 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) [2021-12-21 15:19:53,757 INFO L186 Difference]: Start difference. First operand has 231 places, 230 transitions, 476 flow. Second operand 9 states and 1868 transitions. [2021-12-21 15:19:53,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 255 transitions, 684 flow [2021-12-21 15:19:53,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 255 transitions, 682 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:19:53,761 INFO L242 Difference]: Finished difference. Result has 240 places, 231 transitions, 502 flow [2021-12-21 15:19:53,762 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=502, PETRI_PLACES=240, PETRI_TRANSITIONS=231} [2021-12-21 15:19:53,762 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2021-12-21 15:19:53,762 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 231 transitions, 502 flow [2021-12-21 15:19:53,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.16666666666666) internal successors, (1231), 6 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 15:19:53,763 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:53,763 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:53,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 15:19:53,764 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:53,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:53,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1681614449, now seen corresponding path program 1 times [2021-12-21 15:19:53,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:53,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109214060] [2021-12-21 15:19:53,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:53,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:19:53,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:53,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109214060] [2021-12-21 15:19:53,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109214060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:53,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:53,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:19:53,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387125559] [2021-12-21 15:19:53,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:53,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:19:53,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:53,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:19:53,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:19:53,887 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-21 15:19:53,889 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 231 transitions, 502 flow. Second operand has 6 states, 6 states have (on average 205.83333333333334) internal successors, (1235), 6 states have internal predecessors, (1235), 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) [2021-12-21 15:19:53,889 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:53,889 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-21 15:19:53,889 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:54,045 INFO L129 PetriNetUnfolder]: 127/675 cut-off events. [2021-12-21 15:19:54,046 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2021-12-21 15:19:54,047 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 675 events. 127/675 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2114 event pairs, 67 based on Foata normal form. 8/644 useless extension candidates. Maximal degree in co-relation 1044. Up to 214 conditions per place. [2021-12-21 15:19:54,049 INFO L132 encePairwiseOnDemand]: 255/267 looper letters, 49 selfloop transitions, 8 changer transitions 29/264 dead transitions. [2021-12-21 15:19:54,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 264 transitions, 761 flow [2021-12-21 15:19:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 15:19:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-21 15:19:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1877 transitions. [2021-12-21 15:19:54,053 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7811069496462755 [2021-12-21 15:19:54,053 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1877 transitions. [2021-12-21 15:19:54,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1877 transitions. [2021-12-21 15:19:54,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:54,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1877 transitions. [2021-12-21 15:19:54,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 208.55555555555554) internal successors, (1877), 9 states have internal predecessors, (1877), 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) [2021-12-21 15:19:54,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 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) [2021-12-21 15:19:54,061 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 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) [2021-12-21 15:19:54,061 INFO L186 Difference]: Start difference. First operand has 240 places, 231 transitions, 502 flow. Second operand 9 states and 1877 transitions. [2021-12-21 15:19:54,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 264 transitions, 761 flow [2021-12-21 15:19:54,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 264 transitions, 733 flow, removed 1 selfloop flow, removed 6 redundant places. [2021-12-21 15:19:54,066 INFO L242 Difference]: Finished difference. Result has 242 places, 232 transitions, 516 flow [2021-12-21 15:19:54,066 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=516, PETRI_PLACES=242, PETRI_TRANSITIONS=232} [2021-12-21 15:19:54,067 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 1 predicate places. [2021-12-21 15:19:54,068 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 232 transitions, 516 flow [2021-12-21 15:19:54,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 205.83333333333334) internal successors, (1235), 6 states have internal predecessors, (1235), 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) [2021-12-21 15:19:54,068 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:54,069 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:19:54,069 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1190083129, now seen corresponding path program 1 times [2021-12-21 15:19:54,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976281711] [2021-12-21 15:19:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:54,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:54,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:19:54,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:54,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976281711] [2021-12-21 15:19:54,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976281711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:54,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:54,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 15:19:54,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473277155] [2021-12-21 15:19:54,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:54,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 15:19:54,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 15:19:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:19:54,205 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 267 [2021-12-21 15:19:54,206 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 232 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 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) [2021-12-21 15:19:54,206 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:54,206 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 267 [2021-12-21 15:19:54,206 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:54,361 INFO L129 PetriNetUnfolder]: 245/870 cut-off events. [2021-12-21 15:19:54,361 INFO L130 PetriNetUnfolder]: For 198/198 co-relation queries the response was YES. [2021-12-21 15:19:54,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1584 conditions, 870 events. 245/870 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4090 event pairs, 84 based on Foata normal form. 1/821 useless extension candidates. Maximal degree in co-relation 1576. Up to 226 conditions per place. [2021-12-21 15:19:54,366 INFO L132 encePairwiseOnDemand]: 262/267 looper letters, 57 selfloop transitions, 2 changer transitions 7/249 dead transitions. [2021-12-21 15:19:54,366 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 249 transitions, 699 flow [2021-12-21 15:19:54,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 15:19:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-21 15:19:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2021-12-21 15:19:54,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7752808988764045 [2021-12-21 15:19:54,369 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2021-12-21 15:19:54,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2021-12-21 15:19:54,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:54,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2021-12-21 15:19:54,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 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) [2021-12-21 15:19:54,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 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) [2021-12-21 15:19:54,373 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 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) [2021-12-21 15:19:54,373 INFO L186 Difference]: Start difference. First operand has 242 places, 232 transitions, 516 flow. Second operand 5 states and 1035 transitions. [2021-12-21 15:19:54,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 249 transitions, 699 flow [2021-12-21 15:19:54,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 249 transitions, 685 flow, removed 0 selfloop flow, removed 5 redundant places. [2021-12-21 15:19:54,377 INFO L242 Difference]: Finished difference. Result has 242 places, 233 transitions, 518 flow [2021-12-21 15:19:54,377 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=518, PETRI_PLACES=242, PETRI_TRANSITIONS=233} [2021-12-21 15:19:54,378 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 1 predicate places. [2021-12-21 15:19:54,378 INFO L470 AbstractCegarLoop]: Abstraction has has 242 places, 233 transitions, 518 flow [2021-12-21 15:19:54,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 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) [2021-12-21 15:19:54,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:54,379 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:54,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:19:54,380 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 675274965, now seen corresponding path program 1 times [2021-12-21 15:19:54,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:54,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85436339] [2021-12-21 15:19:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:54,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:19:54,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:54,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85436339] [2021-12-21 15:19:54,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85436339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:54,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:54,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 15:19:54,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226130954] [2021-12-21 15:19:54,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:54,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 15:19:54,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:54,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 15:19:54,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 15:19:54,487 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2021-12-21 15:19:54,488 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 233 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 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) [2021-12-21 15:19:54,488 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:54,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2021-12-21 15:19:54,488 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:54,568 INFO L129 PetriNetUnfolder]: 138/580 cut-off events. [2021-12-21 15:19:54,569 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2021-12-21 15:19:54,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 580 events. 138/580 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1961 event pairs, 50 based on Foata normal form. 11/562 useless extension candidates. Maximal degree in co-relation 982. Up to 128 conditions per place. [2021-12-21 15:19:54,572 INFO L132 encePairwiseOnDemand]: 262/267 looper letters, 22 selfloop transitions, 4 changer transitions 3/241 dead transitions. [2021-12-21 15:19:54,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 241 transitions, 604 flow [2021-12-21 15:19:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 15:19:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-21 15:19:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2021-12-21 15:19:54,574 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8976279650436954 [2021-12-21 15:19:54,574 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2021-12-21 15:19:54,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2021-12-21 15:19:54,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:54,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2021-12-21 15:19:54,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 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) [2021-12-21 15:19:54,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 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) [2021-12-21 15:19:54,577 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 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) [2021-12-21 15:19:54,577 INFO L186 Difference]: Start difference. First operand has 242 places, 233 transitions, 518 flow. Second operand 3 states and 719 transitions. [2021-12-21 15:19:54,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 241 transitions, 604 flow [2021-12-21 15:19:54,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 241 transitions, 598 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-21 15:19:54,581 INFO L242 Difference]: Finished difference. Result has 240 places, 234 transitions, 530 flow [2021-12-21 15:19:54,581 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=530, PETRI_PLACES=240, PETRI_TRANSITIONS=234} [2021-12-21 15:19:54,582 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, -1 predicate places. [2021-12-21 15:19:54,582 INFO L470 AbstractCegarLoop]: Abstraction has has 240 places, 234 transitions, 530 flow [2021-12-21 15:19:54,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 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) [2021-12-21 15:19:54,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:54,583 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:54,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 15:19:54,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:54,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:54,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1313117807, now seen corresponding path program 2 times [2021-12-21 15:19:54,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:54,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784420128] [2021-12-21 15:19:54,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:54,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:19:54,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:54,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784420128] [2021-12-21 15:19:54,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784420128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:19:54,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:19:54,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:19:54,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045014410] [2021-12-21 15:19:54,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:19:54,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:19:54,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:54,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:19:54,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:19:54,675 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2021-12-21 15:19:54,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 234 transitions, 530 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 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) [2021-12-21 15:19:54,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:54,677 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2021-12-21 15:19:54,677 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:54,856 INFO L129 PetriNetUnfolder]: 188/782 cut-off events. [2021-12-21 15:19:54,856 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2021-12-21 15:19:54,858 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1458 conditions, 782 events. 188/782 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3238 event pairs, 121 based on Foata normal form. 9/748 useless extension candidates. Maximal degree in co-relation 1448. Up to 224 conditions per place. [2021-12-21 15:19:54,860 INFO L132 encePairwiseOnDemand]: 259/267 looper letters, 53 selfloop transitions, 6 changer transitions 12/250 dead transitions. [2021-12-21 15:19:54,860 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 250 transitions, 721 flow [2021-12-21 15:19:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:19:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:19:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1460 transitions. [2021-12-21 15:19:54,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7811663991439273 [2021-12-21 15:19:54,863 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1460 transitions. [2021-12-21 15:19:54,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1460 transitions. [2021-12-21 15:19:54,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:54,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1460 transitions. [2021-12-21 15:19:54,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.57142857142858) internal successors, (1460), 7 states have internal predecessors, (1460), 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) [2021-12-21 15:19:54,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 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) [2021-12-21 15:19:54,868 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 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) [2021-12-21 15:19:54,868 INFO L186 Difference]: Start difference. First operand has 240 places, 234 transitions, 530 flow. Second operand 7 states and 1460 transitions. [2021-12-21 15:19:54,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 250 transitions, 721 flow [2021-12-21 15:19:54,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 250 transitions, 717 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-21 15:19:54,873 INFO L242 Difference]: Finished difference. Result has 247 places, 235 transitions, 548 flow [2021-12-21 15:19:54,873 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=548, PETRI_PLACES=247, PETRI_TRANSITIONS=235} [2021-12-21 15:19:54,874 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 6 predicate places. [2021-12-21 15:19:54,874 INFO L470 AbstractCegarLoop]: Abstraction has has 247 places, 235 transitions, 548 flow [2021-12-21 15:19:54,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 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) [2021-12-21 15:19:54,875 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:54,875 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:54,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 15:19:54,875 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1955912811, now seen corresponding path program 1 times [2021-12-21 15:19:54,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491856667] [2021-12-21 15:19:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:54,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:19:55,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491856667] [2021-12-21 15:19:55,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491856667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:19:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037240922] [2021-12-21 15:19:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:55,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:19:55,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:19:55,047 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) [2021-12-21 15:19:55,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:19:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:19:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:19:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:19:55,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:19:55,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2021-12-21 15:19:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:19:56,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037240922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:19:56,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:19:56,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2021-12-21 15:19:56,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599137389] [2021-12-21 15:19:56,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:19:56,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 15:19:56,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:56,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 15:19:56,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-12-21 15:19:56,660 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2021-12-21 15:19:56,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 235 transitions, 548 flow. Second operand has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 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) [2021-12-21 15:19:56,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:56,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2021-12-21 15:19:56,664 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:19:57,135 INFO L129 PetriNetUnfolder]: 189/967 cut-off events. [2021-12-21 15:19:57,135 INFO L130 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2021-12-21 15:19:57,138 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1764 conditions, 967 events. 189/967 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4300 event pairs, 64 based on Foata normal form. 56/973 useless extension candidates. Maximal degree in co-relation 1752. Up to 187 conditions per place. [2021-12-21 15:19:57,140 INFO L132 encePairwiseOnDemand]: 246/267 looper letters, 52 selfloop transitions, 22 changer transitions 61/307 dead transitions. [2021-12-21 15:19:57,140 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 307 transitions, 1045 flow [2021-12-21 15:19:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 15:19:57,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-12-21 15:19:57,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4161 transitions. [2021-12-21 15:19:57,146 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7421080791867308 [2021-12-21 15:19:57,146 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4161 transitions. [2021-12-21 15:19:57,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4161 transitions. [2021-12-21 15:19:57,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:19:57,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4161 transitions. [2021-12-21 15:19:57,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 198.14285714285714) internal successors, (4161), 21 states have internal predecessors, (4161), 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) [2021-12-21 15:19:57,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 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) [2021-12-21 15:19:57,162 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 267.0) internal successors, (5874), 22 states have internal predecessors, (5874), 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) [2021-12-21 15:19:57,162 INFO L186 Difference]: Start difference. First operand has 247 places, 235 transitions, 548 flow. Second operand 21 states and 4161 transitions. [2021-12-21 15:19:57,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 307 transitions, 1045 flow [2021-12-21 15:19:57,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 307 transitions, 1023 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-12-21 15:19:57,167 INFO L242 Difference]: Finished difference. Result has 270 places, 240 transitions, 640 flow [2021-12-21 15:19:57,167 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=640, PETRI_PLACES=270, PETRI_TRANSITIONS=240} [2021-12-21 15:19:57,168 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 29 predicate places. [2021-12-21 15:19:57,168 INFO L470 AbstractCegarLoop]: Abstraction has has 270 places, 240 transitions, 640 flow [2021-12-21 15:19:57,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 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) [2021-12-21 15:19:57,170 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:19:57,170 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:19:57,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 15:19:57,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:19:57,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:19:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:19:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1813303521, now seen corresponding path program 2 times [2021-12-21 15:19:57,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:19:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502455889] [2021-12-21 15:19:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:19:57,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:19:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:19:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 15:19:57,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:19:57,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502455889] [2021-12-21 15:19:57,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502455889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:19:57,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572038] [2021-12-21 15:19:57,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:19:57,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:19:57,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:19:57,544 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) [2021-12-21 15:19:57,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:19:57,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:19:57,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:19:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-21 15:19:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:19:58,446 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-21 15:19:58,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-12-21 15:19:58,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:19:58,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:19:58,761 INFO L353 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2021-12-21 15:19:58,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 19 [2021-12-21 15:19:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 15:19:59,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:19:59,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:19:59,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 16, 6] total 23 [2021-12-21 15:19:59,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351712759] [2021-12-21 15:19:59,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:19:59,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 15:19:59,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:19:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 15:19:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-12-21 15:19:59,336 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 267 [2021-12-21 15:19:59,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 240 transitions, 640 flow. Second operand has 23 states, 23 states have (on average 153.0) internal successors, (3519), 23 states have internal predecessors, (3519), 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) [2021-12-21 15:19:59,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:19:59,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 267 [2021-12-21 15:19:59,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:00,169 INFO L129 PetriNetUnfolder]: 787/2085 cut-off events. [2021-12-21 15:20:00,170 INFO L130 PetriNetUnfolder]: For 3410/3520 co-relation queries the response was YES. [2021-12-21 15:20:00,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5228 conditions, 2085 events. 787/2085 cut-off events. For 3410/3520 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11671 event pairs, 119 based on Foata normal form. 2/1959 useless extension candidates. Maximal degree in co-relation 5208. Up to 651 conditions per place. [2021-12-21 15:20:00,186 INFO L132 encePairwiseOnDemand]: 231/267 looper letters, 195 selfloop transitions, 70 changer transitions 0/397 dead transitions. [2021-12-21 15:20:00,186 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 397 transitions, 1743 flow [2021-12-21 15:20:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-21 15:20:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-12-21 15:20:00,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4864 transitions. [2021-12-21 15:20:00,197 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5692883895131086 [2021-12-21 15:20:00,197 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4864 transitions. [2021-12-21 15:20:00,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4864 transitions. [2021-12-21 15:20:00,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:00,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4864 transitions. [2021-12-21 15:20:00,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 152.0) internal successors, (4864), 32 states have internal predecessors, (4864), 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) [2021-12-21 15:20:00,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 267.0) internal successors, (8811), 33 states have internal predecessors, (8811), 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) [2021-12-21 15:20:00,219 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 267.0) internal successors, (8811), 33 states have internal predecessors, (8811), 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) [2021-12-21 15:20:00,219 INFO L186 Difference]: Start difference. First operand has 270 places, 240 transitions, 640 flow. Second operand 32 states and 4864 transitions. [2021-12-21 15:20:00,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 397 transitions, 1743 flow [2021-12-21 15:20:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 397 transitions, 1600 flow, removed 50 selfloop flow, removed 10 redundant places. [2021-12-21 15:20:00,229 INFO L242 Difference]: Finished difference. Result has 300 places, 301 transitions, 1127 flow [2021-12-21 15:20:00,230 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1127, PETRI_PLACES=300, PETRI_TRANSITIONS=301} [2021-12-21 15:20:00,230 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 59 predicate places. [2021-12-21 15:20:00,231 INFO L470 AbstractCegarLoop]: Abstraction has has 300 places, 301 transitions, 1127 flow [2021-12-21 15:20:00,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 153.0) internal successors, (3519), 23 states have internal predecessors, (3519), 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) [2021-12-21 15:20:00,232 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:00,232 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:20:00,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 15:20:00,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-21 15:20:00,447 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:20:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:00,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1897090553, now seen corresponding path program 3 times [2021-12-21 15:20:00,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:00,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373529372] [2021-12-21 15:20:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:00,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:20:01,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373529372] [2021-12-21 15:20:01,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373529372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410832208] [2021-12-21 15:20:01,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:20:01,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:01,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:01,048 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) [2021-12-21 15:20:01,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 15:20:01,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-21 15:20:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:01,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 15:20:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:01,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 15:20:01,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-21 15:20:01,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-21 15:20:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 15:20:01,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:20:01,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410832208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:01,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:20:01,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [22] total 32 [2021-12-21 15:20:01,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109737095] [2021-12-21 15:20:01,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:01,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 15:20:01,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:01,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 15:20:01,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2021-12-21 15:20:01,917 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 267 [2021-12-21 15:20:01,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 301 transitions, 1127 flow. Second operand has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 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) [2021-12-21 15:20:01,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:01,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 267 [2021-12-21 15:20:01,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:02,793 INFO L129 PetriNetUnfolder]: 1100/2821 cut-off events. [2021-12-21 15:20:02,793 INFO L130 PetriNetUnfolder]: For 7031/7239 co-relation queries the response was YES. [2021-12-21 15:20:02,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9114 conditions, 2821 events. 1100/2821 cut-off events. For 7031/7239 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17927 event pairs, 333 based on Foata normal form. 30/2700 useless extension candidates. Maximal degree in co-relation 9082. Up to 823 conditions per place. [2021-12-21 15:20:02,817 INFO L132 encePairwiseOnDemand]: 242/267 looper letters, 109 selfloop transitions, 35 changer transitions 0/335 dead transitions. [2021-12-21 15:20:02,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 335 transitions, 1641 flow [2021-12-21 15:20:02,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 15:20:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-12-21 15:20:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3268 transitions. [2021-12-21 15:20:02,823 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7199823749724609 [2021-12-21 15:20:02,823 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3268 transitions. [2021-12-21 15:20:02,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3268 transitions. [2021-12-21 15:20:02,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:02,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3268 transitions. [2021-12-21 15:20:02,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 192.23529411764707) internal successors, (3268), 17 states have internal predecessors, (3268), 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) [2021-12-21 15:20:02,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 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) [2021-12-21 15:20:02,834 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 267.0) internal successors, (4806), 18 states have internal predecessors, (4806), 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) [2021-12-21 15:20:02,834 INFO L186 Difference]: Start difference. First operand has 300 places, 301 transitions, 1127 flow. Second operand 17 states and 3268 transitions. [2021-12-21 15:20:02,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 335 transitions, 1641 flow [2021-12-21 15:20:02,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 335 transitions, 1555 flow, removed 33 selfloop flow, removed 8 redundant places. [2021-12-21 15:20:02,845 INFO L242 Difference]: Finished difference. Result has 310 places, 306 transitions, 1192 flow [2021-12-21 15:20:02,846 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1192, PETRI_PLACES=310, PETRI_TRANSITIONS=306} [2021-12-21 15:20:02,846 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 69 predicate places. [2021-12-21 15:20:02,846 INFO L470 AbstractCegarLoop]: Abstraction has has 310 places, 306 transitions, 1192 flow [2021-12-21 15:20:02,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 192.0) internal successors, (2304), 12 states have internal predecessors, (2304), 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) [2021-12-21 15:20:02,847 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:02,847 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:20:02,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 15:20:03,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:03,080 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:20:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash -747039377, now seen corresponding path program 4 times [2021-12-21 15:20:03,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:03,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710013321] [2021-12-21 15:20:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:03,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:20:03,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:03,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710013321] [2021-12-21 15:20:03,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710013321] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:03,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376259070] [2021-12-21 15:20:03,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:20:03,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:03,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:03,766 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:20:03,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 15:20:03,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:20:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-21 15:20:03,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:03,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 15:20:04,009 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 15:20:04,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-21 15:20:04,238 INFO L353 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-12-21 15:20:04,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 15:20:05,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-21 15:20:05,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-21 15:20:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:20:05,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:06,222 INFO L353 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-12-21 15:20:06,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 312 treesize of output 284 [2021-12-21 15:20:06,232 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-21 15:20:06,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 268 treesize of output 220 [2021-12-21 15:20:06,240 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-21 15:20:06,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 150 [2021-12-21 15:20:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 15:20:07,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376259070] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:07,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:07,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 64 [2021-12-21 15:20:07,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472276972] [2021-12-21 15:20:07,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:07,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-21 15:20:07,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-21 15:20:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=3691, Unknown=1, NotChecked=0, Total=4032 [2021-12-21 15:20:07,958 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2021-12-21 15:20:07,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 306 transitions, 1192 flow. Second operand has 64 states, 64 states have (on average 153.15625) internal successors, (9802), 64 states have internal predecessors, (9802), 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) [2021-12-21 15:20:07,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:07,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2021-12-21 15:20:07,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:12,996 INFO L129 PetriNetUnfolder]: 1276/3471 cut-off events. [2021-12-21 15:20:12,997 INFO L130 PetriNetUnfolder]: For 8323/8535 co-relation queries the response was YES. [2021-12-21 15:20:13,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11189 conditions, 3471 events. 1276/3471 cut-off events. For 8323/8535 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 23982 event pairs, 221 based on Foata normal form. 17/3321 useless extension candidates. Maximal degree in co-relation 11154. Up to 1524 conditions per place. [2021-12-21 15:20:13,033 INFO L132 encePairwiseOnDemand]: 208/267 looper letters, 224 selfloop transitions, 163 changer transitions 0/530 dead transitions. [2021-12-21 15:20:13,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 530 transitions, 2907 flow [2021-12-21 15:20:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-21 15:20:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-21 15:20:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 11659 transitions. [2021-12-21 15:20:13,113 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5745614035087719 [2021-12-21 15:20:13,113 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 11659 transitions. [2021-12-21 15:20:13,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 11659 transitions. [2021-12-21 15:20:13,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:13,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 11659 transitions. [2021-12-21 15:20:13,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 153.4078947368421) internal successors, (11659), 76 states have internal predecessors, (11659), 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) [2021-12-21 15:20:13,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 267.0) internal successors, (20559), 77 states have internal predecessors, (20559), 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) [2021-12-21 15:20:13,200 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 267.0) internal successors, (20559), 77 states have internal predecessors, (20559), 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) [2021-12-21 15:20:13,201 INFO L186 Difference]: Start difference. First operand has 310 places, 306 transitions, 1192 flow. Second operand 76 states and 11659 transitions. [2021-12-21 15:20:13,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 530 transitions, 2907 flow [2021-12-21 15:20:13,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 530 transitions, 2803 flow, removed 4 selfloop flow, removed 14 redundant places. [2021-12-21 15:20:13,236 INFO L242 Difference]: Finished difference. Result has 384 places, 415 transitions, 2116 flow [2021-12-21 15:20:13,237 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=2116, PETRI_PLACES=384, PETRI_TRANSITIONS=415} [2021-12-21 15:20:13,237 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 143 predicate places. [2021-12-21 15:20:13,237 INFO L470 AbstractCegarLoop]: Abstraction has has 384 places, 415 transitions, 2116 flow [2021-12-21 15:20:13,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 153.15625) internal successors, (9802), 64 states have internal predecessors, (9802), 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) [2021-12-21 15:20:13,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:13,239 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:20:13,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 15:20:13,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:13,456 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:20:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash 529451187, now seen corresponding path program 5 times [2021-12-21 15:20:13,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:13,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220215897] [2021-12-21 15:20:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:13,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 15:20:13,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:13,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220215897] [2021-12-21 15:20:13,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220215897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:13,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:20:13,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 15:20:13,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280291558] [2021-12-21 15:20:13,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:13,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 15:20:13,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 15:20:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-12-21 15:20:13,694 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 267 [2021-12-21 15:20:13,696 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 415 transitions, 2116 flow. Second operand has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 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) [2021-12-21 15:20:13,696 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:13,696 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 267 [2021-12-21 15:20:13,696 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:14,886 INFO L129 PetriNetUnfolder]: 1552/3922 cut-off events. [2021-12-21 15:20:14,886 INFO L130 PetriNetUnfolder]: For 17594/17877 co-relation queries the response was YES. [2021-12-21 15:20:14,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15351 conditions, 3922 events. 1552/3922 cut-off events. For 17594/17877 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 27161 event pairs, 230 based on Foata normal form. 48/3785 useless extension candidates. Maximal degree in co-relation 15304. Up to 1298 conditions per place. [2021-12-21 15:20:14,943 INFO L132 encePairwiseOnDemand]: 242/267 looper letters, 135 selfloop transitions, 68 changer transitions 0/438 dead transitions. [2021-12-21 15:20:14,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 438 transitions, 2691 flow [2021-12-21 15:20:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 15:20:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-12-21 15:20:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3417 transitions. [2021-12-21 15:20:14,947 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7109862671660424 [2021-12-21 15:20:14,948 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3417 transitions. [2021-12-21 15:20:14,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3417 transitions. [2021-12-21 15:20:14,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:14,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3417 transitions. [2021-12-21 15:20:14,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.83333333333334) internal successors, (3417), 18 states have internal predecessors, (3417), 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) [2021-12-21 15:20:14,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 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) [2021-12-21 15:20:14,959 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 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) [2021-12-21 15:20:14,959 INFO L186 Difference]: Start difference. First operand has 384 places, 415 transitions, 2116 flow. Second operand 18 states and 3417 transitions. [2021-12-21 15:20:14,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 438 transitions, 2691 flow [2021-12-21 15:20:14,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 438 transitions, 2550 flow, removed 33 selfloop flow, removed 27 redundant places. [2021-12-21 15:20:14,994 INFO L242 Difference]: Finished difference. Result has 375 places, 412 transitions, 2103 flow [2021-12-21 15:20:14,995 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2103, PETRI_PLACES=375, PETRI_TRANSITIONS=412} [2021-12-21 15:20:14,996 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 134 predicate places. [2021-12-21 15:20:14,996 INFO L470 AbstractCegarLoop]: Abstraction has has 375 places, 412 transitions, 2103 flow [2021-12-21 15:20:14,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.6153846153846) internal successors, (2465), 13 states have internal predecessors, (2465), 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) [2021-12-21 15:20:14,997 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:14,997 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:20:14,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 15:20:14,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:20:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:14,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1683936119, now seen corresponding path program 1 times [2021-12-21 15:20:14,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:14,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371786739] [2021-12-21 15:20:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:14,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:15,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371786739] [2021-12-21 15:20:15,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371786739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:15,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320584059] [2021-12-21 15:20:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:15,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:15,167 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:20:15,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 15:20:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:15,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-21 15:20:15,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:15,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:16,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320584059] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:16,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:16,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 23 [2021-12-21 15:20:16,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792975813] [2021-12-21 15:20:16,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:16,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 15:20:16,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 15:20:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-12-21 15:20:16,652 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2021-12-21 15:20:16,654 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 412 transitions, 2103 flow. Second operand has 23 states, 23 states have (on average 196.69565217391303) internal successors, (4524), 23 states have internal predecessors, (4524), 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) [2021-12-21 15:20:16,654 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:16,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2021-12-21 15:20:16,655 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:17,769 INFO L129 PetriNetUnfolder]: 1840/5514 cut-off events. [2021-12-21 15:20:17,770 INFO L130 PetriNetUnfolder]: For 24690/25105 co-relation queries the response was YES. [2021-12-21 15:20:17,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20811 conditions, 5514 events. 1840/5514 cut-off events. For 24690/25105 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 44770 event pairs, 492 based on Foata normal form. 77/5315 useless extension candidates. Maximal degree in co-relation 20764. Up to 1225 conditions per place. [2021-12-21 15:20:17,817 INFO L132 encePairwiseOnDemand]: 247/267 looper letters, 123 selfloop transitions, 54 changer transitions 110/525 dead transitions. [2021-12-21 15:20:17,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 525 transitions, 3572 flow [2021-12-21 15:20:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 15:20:17,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-12-21 15:20:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3945 transitions. [2021-12-21 15:20:17,820 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7387640449438202 [2021-12-21 15:20:17,820 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3945 transitions. [2021-12-21 15:20:17,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3945 transitions. [2021-12-21 15:20:17,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:17,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3945 transitions. [2021-12-21 15:20:17,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.25) internal successors, (3945), 20 states have internal predecessors, (3945), 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) [2021-12-21 15:20:17,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 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) [2021-12-21 15:20:17,829 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 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) [2021-12-21 15:20:17,829 INFO L186 Difference]: Start difference. First operand has 375 places, 412 transitions, 2103 flow. Second operand 20 states and 3945 transitions. [2021-12-21 15:20:17,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 525 transitions, 3572 flow [2021-12-21 15:20:17,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 525 transitions, 3435 flow, removed 5 selfloop flow, removed 15 redundant places. [2021-12-21 15:20:17,869 INFO L242 Difference]: Finished difference. Result has 382 places, 411 transitions, 2119 flow [2021-12-21 15:20:17,869 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2119, PETRI_PLACES=382, PETRI_TRANSITIONS=411} [2021-12-21 15:20:17,870 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 141 predicate places. [2021-12-21 15:20:17,870 INFO L470 AbstractCegarLoop]: Abstraction has has 382 places, 411 transitions, 2119 flow [2021-12-21 15:20:17,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 196.69565217391303) internal successors, (4524), 23 states have internal predecessors, (4524), 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) [2021-12-21 15:20:17,871 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:17,871 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:20:17,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 15:20:18,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 15:20:18,089 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:20:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:18,089 INFO L85 PathProgramCache]: Analyzing trace with hash 270605113, now seen corresponding path program 2 times [2021-12-21 15:20:18,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:18,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148672315] [2021-12-21 15:20:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:18,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 15:20:18,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148672315] [2021-12-21 15:20:18,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148672315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087699021] [2021-12-21 15:20:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 15:20:18,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:18,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:18,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:20:18,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 15:20:18,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 15:20:18,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:18,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 15:20:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 15:20:18,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 15:20:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087699021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:20:18,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 15:20:18,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-12-21 15:20:18,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292701882] [2021-12-21 15:20:18,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:20:18,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 15:20:18,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:18,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 15:20:18,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 15:20:18,737 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2021-12-21 15:20:18,737 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 411 transitions, 2119 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 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) [2021-12-21 15:20:18,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:18,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2021-12-21 15:20:18,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:19,470 INFO L129 PetriNetUnfolder]: 1502/4653 cut-off events. [2021-12-21 15:20:19,471 INFO L130 PetriNetUnfolder]: For 23242/23555 co-relation queries the response was YES. [2021-12-21 15:20:19,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16982 conditions, 4653 events. 1502/4653 cut-off events. For 23242/23555 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 36792 event pairs, 249 based on Foata normal form. 146/4496 useless extension candidates. Maximal degree in co-relation 16932. Up to 1030 conditions per place. [2021-12-21 15:20:19,519 INFO L132 encePairwiseOnDemand]: 263/267 looper letters, 74 selfloop transitions, 39 changer transitions 0/450 dead transitions. [2021-12-21 15:20:19,519 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 450 transitions, 2692 flow [2021-12-21 15:20:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 15:20:19,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-21 15:20:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2021-12-21 15:20:19,520 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9091760299625468 [2021-12-21 15:20:19,521 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2021-12-21 15:20:19,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2021-12-21 15:20:19,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:19,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2021-12-21 15:20:19,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 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) [2021-12-21 15:20:19,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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) [2021-12-21 15:20:19,523 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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) [2021-12-21 15:20:19,523 INFO L186 Difference]: Start difference. First operand has 382 places, 411 transitions, 2119 flow. Second operand 4 states and 971 transitions. [2021-12-21 15:20:19,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 450 transitions, 2692 flow [2021-12-21 15:20:19,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 450 transitions, 2598 flow, removed 7 selfloop flow, removed 8 redundant places. [2021-12-21 15:20:19,550 INFO L242 Difference]: Finished difference. Result has 372 places, 428 transitions, 2420 flow [2021-12-21 15:20:19,551 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2027, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2420, PETRI_PLACES=372, PETRI_TRANSITIONS=428} [2021-12-21 15:20:19,551 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 131 predicate places. [2021-12-21 15:20:19,551 INFO L470 AbstractCegarLoop]: Abstraction has has 372 places, 428 transitions, 2420 flow [2021-12-21 15:20:19,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 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) [2021-12-21 15:20:19,551 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:19,552 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:20:19,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 15:20:19,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:19,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:20:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:19,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2087212167, now seen corresponding path program 3 times [2021-12-21 15:20:19,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:19,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694527593] [2021-12-21 15:20:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:19,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:20,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:20,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694527593] [2021-12-21 15:20:20,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694527593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:20,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322584096] [2021-12-21 15:20:20,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 15:20:20,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:20,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:20,394 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:20:20,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 15:20:20,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 15:20:20,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:20,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-21 15:20:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:21,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 15:20:21,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2021-12-21 15:20:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 15:20:21,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:22,327 INFO L353 Elim1Store]: treesize reduction 12, result has 89.0 percent of original size [2021-12-21 15:20:22,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2021-12-21 15:20:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 15:20:22,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322584096] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:22,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:22,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12, 9] total 39 [2021-12-21 15:20:22,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420327427] [2021-12-21 15:20:22,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:22,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 15:20:22,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 15:20:22,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-12-21 15:20:22,805 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2021-12-21 15:20:22,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 428 transitions, 2420 flow. Second operand has 39 states, 39 states have (on average 154.66666666666666) internal successors, (6032), 39 states have internal predecessors, (6032), 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) [2021-12-21 15:20:22,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:22,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2021-12-21 15:20:22,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:27,450 INFO L129 PetriNetUnfolder]: 7863/16725 cut-off events. [2021-12-21 15:20:27,450 INFO L130 PetriNetUnfolder]: For 119964/122349 co-relation queries the response was YES. [2021-12-21 15:20:27,531 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71724 conditions, 16725 events. 7863/16725 cut-off events. For 119964/122349 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 147542 event pairs, 1767 based on Foata normal form. 46/15175 useless extension candidates. Maximal degree in co-relation 71673. Up to 8091 conditions per place. [2021-12-21 15:20:27,606 INFO L132 encePairwiseOnDemand]: 206/267 looper letters, 355 selfloop transitions, 241 changer transitions 1/735 dead transitions. [2021-12-21 15:20:27,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 735 transitions, 6146 flow [2021-12-21 15:20:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-21 15:20:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-12-21 15:20:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 10059 transitions. [2021-12-21 15:20:27,630 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5796024200518582 [2021-12-21 15:20:27,630 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 10059 transitions. [2021-12-21 15:20:27,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 10059 transitions. [2021-12-21 15:20:27,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:27,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 10059 transitions. [2021-12-21 15:20:27,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 154.75384615384615) internal successors, (10059), 65 states have internal predecessors, (10059), 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) [2021-12-21 15:20:27,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 267.0) internal successors, (17622), 66 states have internal predecessors, (17622), 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) [2021-12-21 15:20:27,667 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 267.0) internal successors, (17622), 66 states have internal predecessors, (17622), 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) [2021-12-21 15:20:27,667 INFO L186 Difference]: Start difference. First operand has 372 places, 428 transitions, 2420 flow. Second operand 65 states and 10059 transitions. [2021-12-21 15:20:27,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 735 transitions, 6146 flow [2021-12-21 15:20:27,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 735 transitions, 5966 flow, removed 90 selfloop flow, removed 1 redundant places. [2021-12-21 15:20:27,754 INFO L242 Difference]: Finished difference. Result has 452 places, 568 transitions, 4473 flow [2021-12-21 15:20:27,755 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=4473, PETRI_PLACES=452, PETRI_TRANSITIONS=568} [2021-12-21 15:20:27,755 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 211 predicate places. [2021-12-21 15:20:27,756 INFO L470 AbstractCegarLoop]: Abstraction has has 452 places, 568 transitions, 4473 flow [2021-12-21 15:20:27,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 154.66666666666666) internal successors, (6032), 39 states have internal predecessors, (6032), 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) [2021-12-21 15:20:27,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:27,757 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:20:27,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 15:20:27,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:27,972 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:20:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:27,972 INFO L85 PathProgramCache]: Analyzing trace with hash 439988631, now seen corresponding path program 4 times [2021-12-21 15:20:27,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:27,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844225900] [2021-12-21 15:20:27,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:27,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:28,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:28,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844225900] [2021-12-21 15:20:28,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844225900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:28,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693518784] [2021-12-21 15:20:28,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 15:20:28,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:28,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:28,597 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:20:28,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 15:20:28,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 15:20:28,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-21 15:20:28,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 15:20:32,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:33,362 INFO L353 Elim1Store]: treesize reduction 46, result has 74.9 percent of original size [2021-12-21 15:20:33,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 154 [2021-12-21 15:20:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:35,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693518784] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:35,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:35,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 18] total 63 [2021-12-21 15:20:35,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885672734] [2021-12-21 15:20:35,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:35,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-21 15:20:35,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:35,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-21 15:20:35,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=3509, Unknown=0, NotChecked=0, Total=3906 [2021-12-21 15:20:35,157 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2021-12-21 15:20:35,162 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 568 transitions, 4473 flow. Second operand has 63 states, 63 states have (on average 153.34920634920636) internal successors, (9661), 63 states have internal predecessors, (9661), 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) [2021-12-21 15:20:35,162 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:35,162 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2021-12-21 15:20:35,162 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:20:47,783 INFO L129 PetriNetUnfolder]: 14297/31399 cut-off events. [2021-12-21 15:20:47,783 INFO L130 PetriNetUnfolder]: For 303808/310084 co-relation queries the response was YES. [2021-12-21 15:20:48,019 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159095 conditions, 31399 events. 14297/31399 cut-off events. For 303808/310084 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 319645 event pairs, 1809 based on Foata normal form. 610/30014 useless extension candidates. Maximal degree in co-relation 159027. Up to 12972 conditions per place. [2021-12-21 15:20:48,368 INFO L132 encePairwiseOnDemand]: 211/267 looper letters, 809 selfloop transitions, 533 changer transitions 12/1493 dead transitions. [2021-12-21 15:20:48,369 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 1493 transitions, 16541 flow [2021-12-21 15:20:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-12-21 15:20:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-12-21 15:20:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 18359 transitions. [2021-12-21 15:20:48,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5778176439114971 [2021-12-21 15:20:48,402 INFO L72 ComplementDD]: Start complementDD. Operand 119 states and 18359 transitions. [2021-12-21 15:20:48,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 119 states and 18359 transitions. [2021-12-21 15:20:48,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:20:48,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 119 states and 18359 transitions. [2021-12-21 15:20:48,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 120 states, 119 states have (on average 154.27731092436974) internal successors, (18359), 119 states have internal predecessors, (18359), 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) [2021-12-21 15:20:48,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 120 states, 120 states have (on average 267.0) internal successors, (32040), 120 states have internal predecessors, (32040), 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) [2021-12-21 15:20:48,472 INFO L81 ComplementDD]: Finished complementDD. Result has 120 states, 120 states have (on average 267.0) internal successors, (32040), 120 states have internal predecessors, (32040), 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) [2021-12-21 15:20:48,472 INFO L186 Difference]: Start difference. First operand has 452 places, 568 transitions, 4473 flow. Second operand 119 states and 18359 transitions. [2021-12-21 15:20:48,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 1493 transitions, 16541 flow [2021-12-21 15:20:49,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1493 transitions, 15685 flow, removed 325 selfloop flow, removed 36 redundant places. [2021-12-21 15:20:49,404 INFO L242 Difference]: Finished difference. Result has 573 places, 1059 transitions, 10919 flow [2021-12-21 15:20:49,405 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4152, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=10919, PETRI_PLACES=573, PETRI_TRANSITIONS=1059} [2021-12-21 15:20:49,405 INFO L334 CegarLoopForPetriNet]: 241 programPoint places, 332 predicate places. [2021-12-21 15:20:49,405 INFO L470 AbstractCegarLoop]: Abstraction has has 573 places, 1059 transitions, 10919 flow [2021-12-21 15:20:49,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 153.34920634920636) internal successors, (9661), 63 states have internal predecessors, (9661), 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) [2021-12-21 15:20:49,407 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:20:49,407 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:20:49,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 15:20:49,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 15:20:49,624 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-12-21 15:20:49,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:20:49,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1521122959, now seen corresponding path program 5 times [2021-12-21 15:20:49,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:20:49,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705466269] [2021-12-21 15:20:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:20:49,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:20:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:20:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:50,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:20:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705466269] [2021-12-21 15:20:50,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705466269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:20:50,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205148806] [2021-12-21 15:20:50,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 15:20:50,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:20:50,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:20:50,195 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:20:50,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 15:20:50,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-21 15:20:50,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 15:20:50,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-21 15:20:50,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:20:51,813 INFO L353 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2021-12-21 15:20:51,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 99 [2021-12-21 15:20:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:52,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:20:52,470 INFO L353 Elim1Store]: treesize reduction 32, result has 82.1 percent of original size [2021-12-21 15:20:52,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 165 [2021-12-21 15:20:53,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 15:20:53,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205148806] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:20:53,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:20:53,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 18] total 51 [2021-12-21 15:20:53,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141598196] [2021-12-21 15:20:53,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:20:53,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-21 15:20:53,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:20:53,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-21 15:20:53,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2254, Unknown=0, NotChecked=0, Total=2550 [2021-12-21 15:20:53,457 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 267 [2021-12-21 15:20:53,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1059 transitions, 10919 flow. Second operand has 51 states, 51 states have (on average 153.52941176470588) internal successors, (7830), 51 states have internal predecessors, (7830), 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) [2021-12-21 15:20:53,461 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:20:53,461 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 267 [2021-12-21 15:20:53,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand