./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-longest-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:42:51,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:42:51,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:42:51,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:42:51,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:42:51,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:42:51,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:42:51,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:42:51,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:42:51,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:42:51,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:42:51,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:42:51,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:42:51,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:42:51,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:42:51,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:42:51,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:42:51,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:42:51,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:42:51,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:42:51,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:42:51,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:42:51,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:42:51,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:42:51,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:42:51,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:42:51,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:42:51,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:42:51,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:42:51,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:42:51,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:42:51,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:42:51,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:42:51,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:42:51,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:42:51,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:42:51,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:42:51,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:42:51,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:42:51,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:42:51,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:42:51,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:42:51,952 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:42:51,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:42:51,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:42:51,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:42:51,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:42:51,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:42:51,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:42:51,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:42:51,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:42:51,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:42:51,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:42:51,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:42:51,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:42:51,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:42:51,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:42:51,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:42:51,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:42:51,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:42:51,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:42:51,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:42:51,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:42:51,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:42:51,962 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:42:51,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:42:51,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:42:51,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:42:51,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 874fb84f685baf0441a9bf8db1864605baa10908128545fe3028b9b499246108 [2021-12-16 02:42:52,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:42:52,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:42:52,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:42:52,156 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:42:52,156 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:42:52,157 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-2.i [2021-12-16 02:42:52,223 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f545ae91/d030195dc58f439e8b0244c5f2ef1b3b/FLAG7d35b18a5 [2021-12-16 02:42:52,627 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:42:52,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i [2021-12-16 02:42:52,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f545ae91/d030195dc58f439e8b0244c5f2ef1b3b/FLAG7d35b18a5 [2021-12-16 02:42:52,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f545ae91/d030195dc58f439e8b0244c5f2ef1b3b [2021-12-16 02:42:52,658 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:42:52,659 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:42:52,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:42:52,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:42:52,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:42:52,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:42:52" (1/1) ... [2021-12-16 02:42:52,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79860840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:52, skipping insertion in model container [2021-12-16 02:42:52,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:42:52" (1/1) ... [2021-12-16 02:42:52,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:42:52,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:42:52,933 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2021-12-16 02:42:52,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:42:52,946 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:42:52,985 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i[30964,30977] [2021-12-16 02:42:52,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:42:53,015 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:42:53,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53 WrapperNode [2021-12-16 02:42:53,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:42:53,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:42:53,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:42:53,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:42:53,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,059 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-12-16 02:42:53,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:42:53,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:42:53,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:42:53,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:42:53,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:42:53,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:42:53,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:42:53,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:42:53,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (1/1) ... [2021-12-16 02:42:53,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:42:53,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:53,120 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) [2021-12-16 02:42:53,138 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 [2021-12-16 02:42:53,148 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-12-16 02:42:53,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-12-16 02:42:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-12-16 02:42:53,149 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-12-16 02:42:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 02:42:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 02:42:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:42:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 02:42:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 02:42:53,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:42:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 02:42:53,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:42:53,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:42:53,151 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-16 02:42:53,237 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:42:53,238 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:42:53,355 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:42:53,359 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:42:53,360 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 02:42:53,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:42:53 BoogieIcfgContainer [2021-12-16 02:42:53,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:42:53,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:42:53,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:42:53,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:42:53,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:42:52" (1/3) ... [2021-12-16 02:42:53,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a2a161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:42:53, skipping insertion in model container [2021-12-16 02:42:53,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:42:53" (2/3) ... [2021-12-16 02:42:53,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32a2a161 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:42:53, skipping insertion in model container [2021-12-16 02:42:53,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:42:53" (3/3) ... [2021-12-16 02:42:53,367 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-12-16 02:42:53,370 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 02:42:53,371 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:42:53,371 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 02:42:53,371 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 02:42:53,397 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,397 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,397 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,397 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,398 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,398 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,398 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,398 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,398 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,399 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,399 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,399 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,399 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,399 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,400 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,400 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,401 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,401 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,401 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,401 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,401 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,401 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,402 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,402 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,402 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,402 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,402 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,403 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,403 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,403 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,403 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,403 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,403 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,404 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,404 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,404 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,404 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,404 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,404 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,405 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,405 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,405 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,405 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,405 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,406 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,406 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,406 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,406 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,406 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,406 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,406 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,407 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,409 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,411 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,411 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,411 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,411 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,412 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,414 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,415 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,416 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,416 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,416 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,416 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 02:42:53,417 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-12-16 02:42:53,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:42:53,475 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 [2021-12-16 02:42:53,475 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 02:42:53,486 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2021-12-16 02:42:53,520 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-12-16 02:42:53,532 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-16 02:42:53,536 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2021-12-16 02:42:53,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2021-12-16 02:42:53,543 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2021-12-16 02:42:53,569 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2021-12-16 02:42:53,570 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-16 02:42:53,571 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:53,572 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] [2021-12-16 02:42:53,574 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2021-12-16 02:42:53,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:53,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066401265] [2021-12-16 02:42:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:53,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:53,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:53,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066401265] [2021-12-16 02:42:53,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066401265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:53,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:53,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:42:53,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794499434] [2021-12-16 02:42:53,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:53,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:42:53,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:53,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:42:53,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:42:53,987 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:53,992 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 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) [2021-12-16 02:42:53,992 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:53,992 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:53,993 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:54,138 INFO L129 PetriNetUnfolder]: 50/247 cut-off events. [2021-12-16 02:42:54,138 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-16 02:42:54,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 247 events. 50/247 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1076 event pairs, 1 based on Foata normal form. 52/277 useless extension candidates. Maximal degree in co-relation 304. Up to 27 conditions per place. [2021-12-16 02:42:54,143 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 14 selfloop transitions, 6 changer transitions 20/85 dead transitions. [2021-12-16 02:42:54,143 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 240 flow [2021-12-16 02:42:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 02:42:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-12-16 02:42:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 491 transitions. [2021-12-16 02:42:54,159 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8767857142857143 [2021-12-16 02:42:54,160 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 491 transitions. [2021-12-16 02:42:54,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 491 transitions. [2021-12-16 02:42:54,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:54,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 491 transitions. [2021-12-16 02:42:54,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 61.375) internal successors, (491), 8 states have internal predecessors, (491), 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) [2021-12-16 02:42:54,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2021-12-16 02:42:54,178 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 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) [2021-12-16 02:42:54,179 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 8 states and 491 transitions. [2021-12-16 02:42:54,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 240 flow [2021-12-16 02:42:54,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-16 02:42:54,186 INFO L242 Difference]: Finished difference. Result has 80 places, 59 transitions, 164 flow [2021-12-16 02:42:54,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=80, PETRI_TRANSITIONS=59} [2021-12-16 02:42:54,190 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 10 predicate places. [2021-12-16 02:42:54,190 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 59 transitions, 164 flow [2021-12-16 02:42:54,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 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) [2021-12-16 02:42:54,191 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:54,191 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] [2021-12-16 02:42:54,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:42:54,191 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2021-12-16 02:42:54,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:54,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049741466] [2021-12-16 02:42:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:54,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:54,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:54,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049741466] [2021-12-16 02:42:54,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049741466] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:54,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:54,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:42:54,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551474228] [2021-12-16 02:42:54,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:54,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:42:54,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:42:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:42:54,280 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:54,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 59 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-12-16 02:42:54,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:54,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:54,281 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:54,367 INFO L129 PetriNetUnfolder]: 43/212 cut-off events. [2021-12-16 02:42:54,367 INFO L130 PetriNetUnfolder]: For 212/229 co-relation queries the response was YES. [2021-12-16 02:42:54,369 INFO L84 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 212 events. 43/212 cut-off events. For 212/229 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 754 event pairs, 0 based on Foata normal form. 3/194 useless extension candidates. Maximal degree in co-relation 414. Up to 40 conditions per place. [2021-12-16 02:42:54,370 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 22 selfloop transitions, 11 changer transitions 8/86 dead transitions. [2021-12-16 02:42:54,371 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 86 transitions, 414 flow [2021-12-16 02:42:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:42:54,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 02:42:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-12-16 02:42:54,372 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-12-16 02:42:54,372 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-12-16 02:42:54,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-12-16 02:42:54,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:54,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-12-16 02:42:54,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 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) [2021-12-16 02:42:54,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2021-12-16 02:42:54,375 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2021-12-16 02:42:54,375 INFO L186 Difference]: Start difference. First operand has 80 places, 59 transitions, 164 flow. Second operand 9 states and 530 transitions. [2021-12-16 02:42:54,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 86 transitions, 414 flow [2021-12-16 02:42:54,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 400 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-12-16 02:42:54,380 INFO L242 Difference]: Finished difference. Result has 81 places, 69 transitions, 282 flow [2021-12-16 02:42:54,380 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=282, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2021-12-16 02:42:54,380 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 11 predicate places. [2021-12-16 02:42:54,381 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 282 flow [2021-12-16 02:42:54,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-12-16 02:42:54,381 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:54,381 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] [2021-12-16 02:42:54,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:42:54,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2021-12-16 02:42:54,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:54,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123977484] [2021-12-16 02:42:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:54,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:54,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:54,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123977484] [2021-12-16 02:42:54,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123977484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:54,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:54,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:42:54,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819255166] [2021-12-16 02:42:54,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:54,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:42:54,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:42:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:42:54,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:54,463 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-12-16 02:42:54,463 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:54,463 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:54,463 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:54,556 INFO L129 PetriNetUnfolder]: 37/204 cut-off events. [2021-12-16 02:42:54,556 INFO L130 PetriNetUnfolder]: For 617/659 co-relation queries the response was YES. [2021-12-16 02:42:54,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 204 events. 37/204 cut-off events. For 617/659 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 713 event pairs, 0 based on Foata normal form. 13/198 useless extension candidates. Maximal degree in co-relation 487. Up to 36 conditions per place. [2021-12-16 02:42:54,558 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2021-12-16 02:42:54,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 552 flow [2021-12-16 02:42:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:42:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-16 02:42:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2021-12-16 02:42:54,561 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2021-12-16 02:42:54,561 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2021-12-16 02:42:54,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2021-12-16 02:42:54,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:54,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2021-12-16 02:42:54,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 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) [2021-12-16 02:42:54,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2021-12-16 02:42:54,565 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 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) [2021-12-16 02:42:54,565 INFO L186 Difference]: Start difference. First operand has 81 places, 69 transitions, 282 flow. Second operand 9 states and 524 transitions. [2021-12-16 02:42:54,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 552 flow [2021-12-16 02:42:54,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 508 flow, removed 22 selfloop flow, removed 3 redundant places. [2021-12-16 02:42:54,574 INFO L242 Difference]: Finished difference. Result has 88 places, 71 transitions, 331 flow [2021-12-16 02:42:54,574 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=331, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2021-12-16 02:42:54,575 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2021-12-16 02:42:54,576 INFO L470 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 331 flow [2021-12-16 02:42:54,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 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) [2021-12-16 02:42:54,576 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:54,576 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] [2021-12-16 02:42:54,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:42:54,577 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:54,577 INFO L85 PathProgramCache]: Analyzing trace with hash 273435771, now seen corresponding path program 1 times [2021-12-16 02:42:54,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:54,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631185053] [2021-12-16 02:42:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:54,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:54,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:54,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631185053] [2021-12-16 02:42:54,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631185053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:54,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:54,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:42:54,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23621564] [2021-12-16 02:42:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:54,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:42:54,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:42:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:42:54,668 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:54,668 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2021-12-16 02:42:54,668 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:54,668 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:54,668 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:54,766 INFO L129 PetriNetUnfolder]: 43/234 cut-off events. [2021-12-16 02:42:54,767 INFO L130 PetriNetUnfolder]: For 891/923 co-relation queries the response was YES. [2021-12-16 02:42:54,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 234 events. 43/234 cut-off events. For 891/923 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 838 event pairs, 1 based on Foata normal form. 10/222 useless extension candidates. Maximal degree in co-relation 609. Up to 42 conditions per place. [2021-12-16 02:42:54,769 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 20 selfloop transitions, 20 changer transitions 8/93 dead transitions. [2021-12-16 02:42:54,770 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 93 transitions, 685 flow [2021-12-16 02:42:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 02:42:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-16 02:42:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2021-12-16 02:42:54,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2021-12-16 02:42:54,772 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2021-12-16 02:42:54,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2021-12-16 02:42:54,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:54,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2021-12-16 02:42:54,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 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) [2021-12-16 02:42:54,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2021-12-16 02:42:54,775 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 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) [2021-12-16 02:42:54,775 INFO L186 Difference]: Start difference. First operand has 88 places, 71 transitions, 331 flow. Second operand 11 states and 644 transitions. [2021-12-16 02:42:54,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 93 transitions, 685 flow [2021-12-16 02:42:54,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 588 flow, removed 38 selfloop flow, removed 8 redundant places. [2021-12-16 02:42:54,779 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 416 flow [2021-12-16 02:42:54,779 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=416, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-12-16 02:42:54,780 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 24 predicate places. [2021-12-16 02:42:54,780 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 416 flow [2021-12-16 02:42:54,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2021-12-16 02:42:54,780 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:54,781 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] [2021-12-16 02:42:54,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:42:54,781 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:54,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1454977483, now seen corresponding path program 2 times [2021-12-16 02:42:54,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:54,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703880934] [2021-12-16 02:42:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:54,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:54,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:54,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703880934] [2021-12-16 02:42:54,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703880934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:42:54,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:42:54,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:42:54,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485211035] [2021-12-16 02:42:54,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:42:54,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:42:54,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:54,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:42:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:42:54,845 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:54,845 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2021-12-16 02:42:54,845 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:54,845 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:54,845 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:54,953 INFO L129 PetriNetUnfolder]: 38/219 cut-off events. [2021-12-16 02:42:54,953 INFO L130 PetriNetUnfolder]: For 1007/1063 co-relation queries the response was YES. [2021-12-16 02:42:54,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 645 conditions, 219 events. 38/219 cut-off events. For 1007/1063 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 808 event pairs, 1 based on Foata normal form. 20/218 useless extension candidates. Maximal degree in co-relation 600. Up to 41 conditions per place. [2021-12-16 02:42:54,955 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 18 selfloop transitions, 22 changer transitions 11/96 dead transitions. [2021-12-16 02:42:54,955 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 786 flow [2021-12-16 02:42:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 02:42:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-16 02:42:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2021-12-16 02:42:54,957 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-12-16 02:42:54,957 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2021-12-16 02:42:54,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2021-12-16 02:42:54,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:54,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2021-12-16 02:42:54,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 states have internal predecessors, (696), 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) [2021-12-16 02:42:54,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 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) [2021-12-16 02:42:54,960 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 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) [2021-12-16 02:42:54,960 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 416 flow. Second operand 12 states and 696 transitions. [2021-12-16 02:42:54,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 786 flow [2021-12-16 02:42:54,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 96 transitions, 712 flow, removed 21 selfloop flow, removed 7 redundant places. [2021-12-16 02:42:54,964 INFO L242 Difference]: Finished difference. Result has 101 places, 79 transitions, 494 flow [2021-12-16 02:42:54,964 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=494, PETRI_PLACES=101, PETRI_TRANSITIONS=79} [2021-12-16 02:42:54,965 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 31 predicate places. [2021-12-16 02:42:54,965 INFO L470 AbstractCegarLoop]: Abstraction has has 101 places, 79 transitions, 494 flow [2021-12-16 02:42:54,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 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) [2021-12-16 02:42:54,965 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:54,966 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-16 02:42:54,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:42:54,966 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash 2138322864, now seen corresponding path program 1 times [2021-12-16 02:42:54,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:54,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295132773] [2021-12-16 02:42:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:54,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:55,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:55,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295132773] [2021-12-16 02:42:55,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295132773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:55,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999101752] [2021-12-16 02:42:55,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:55,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:55,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:55,045 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) [2021-12-16 02:42:55,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:42:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:55,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 02:42:55,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:55,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:55,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999101752] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:55,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:55,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-16 02:42:55,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154309846] [2021-12-16 02:42:55,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:55,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 02:42:55,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:55,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 02:42:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-16 02:42:55,513 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:55,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 79 transitions, 494 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2021-12-16 02:42:55,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:55,514 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:55,514 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:55,702 INFO L129 PetriNetUnfolder]: 50/302 cut-off events. [2021-12-16 02:42:55,703 INFO L130 PetriNetUnfolder]: For 1818/1870 co-relation queries the response was YES. [2021-12-16 02:42:55,705 INFO L84 FinitePrefix]: Finished finitePrefix Result has 937 conditions, 302 events. 50/302 cut-off events. For 1818/1870 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1054 event pairs, 0 based on Foata normal form. 24/295 useless extension candidates. Maximal degree in co-relation 887. Up to 59 conditions per place. [2021-12-16 02:42:55,706 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 34 selfloop transitions, 17 changer transitions 20/116 dead transitions. [2021-12-16 02:42:55,707 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 1215 flow [2021-12-16 02:42:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 02:42:55,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-16 02:42:55,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1104 transitions. [2021-12-16 02:42:55,709 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8300751879699249 [2021-12-16 02:42:55,709 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1104 transitions. [2021-12-16 02:42:55,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1104 transitions. [2021-12-16 02:42:55,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:55,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1104 transitions. [2021-12-16 02:42:55,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 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) [2021-12-16 02:42:55,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 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) [2021-12-16 02:42:55,714 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 70.0) internal successors, (1400), 20 states have internal predecessors, (1400), 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) [2021-12-16 02:42:55,714 INFO L186 Difference]: Start difference. First operand has 101 places, 79 transitions, 494 flow. Second operand 19 states and 1104 transitions. [2021-12-16 02:42:55,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 1215 flow [2021-12-16 02:42:55,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 116 transitions, 1089 flow, removed 42 selfloop flow, removed 10 redundant places. [2021-12-16 02:42:55,720 INFO L242 Difference]: Finished difference. Result has 119 places, 85 transitions, 598 flow [2021-12-16 02:42:55,721 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=598, PETRI_PLACES=119, PETRI_TRANSITIONS=85} [2021-12-16 02:42:55,721 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 49 predicate places. [2021-12-16 02:42:55,721 INFO L470 AbstractCegarLoop]: Abstraction has has 119 places, 85 transitions, 598 flow [2021-12-16 02:42:55,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2021-12-16 02:42:55,722 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:55,722 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-12-16 02:42:55,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:42:55,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 02:42:55,936 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2088183908, now seen corresponding path program 2 times [2021-12-16 02:42:55,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:55,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799658661] [2021-12-16 02:42:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:55,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:55,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:55,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:55,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799658661] [2021-12-16 02:42:55,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799658661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:55,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285799353] [2021-12-16 02:42:55,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:42:55,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:55,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:56,000 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) [2021-12-16 02:42:56,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:42:56,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:42:56,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:42:56,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 02:42:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:56,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:56,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285799353] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:56,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:56,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-12-16 02:42:56,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472842976] [2021-12-16 02:42:56,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:56,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 02:42:56,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:56,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 02:42:56,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-16 02:42:56,295 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:56,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 85 transitions, 598 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2021-12-16 02:42:56,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:56,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:56,296 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:56,631 INFO L129 PetriNetUnfolder]: 79/443 cut-off events. [2021-12-16 02:42:56,631 INFO L130 PetriNetUnfolder]: For 7219/7347 co-relation queries the response was YES. [2021-12-16 02:42:56,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 443 events. 79/443 cut-off events. For 7219/7347 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2069 event pairs, 0 based on Foata normal form. 27/427 useless extension candidates. Maximal degree in co-relation 1864. Up to 99 conditions per place. [2021-12-16 02:42:56,637 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 30 selfloop transitions, 48 changer transitions 23/146 dead transitions. [2021-12-16 02:42:56,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 146 transitions, 2267 flow [2021-12-16 02:42:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 02:42:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-12-16 02:42:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1626 transitions. [2021-12-16 02:42:56,640 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8295918367346938 [2021-12-16 02:42:56,640 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1626 transitions. [2021-12-16 02:42:56,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1626 transitions. [2021-12-16 02:42:56,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:56,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1626 transitions. [2021-12-16 02:42:56,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 58.07142857142857) internal successors, (1626), 28 states have internal predecessors, (1626), 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) [2021-12-16 02:42:56,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 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) [2021-12-16 02:42:56,646 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 70.0) internal successors, (2030), 29 states have internal predecessors, (2030), 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) [2021-12-16 02:42:56,647 INFO L186 Difference]: Start difference. First operand has 119 places, 85 transitions, 598 flow. Second operand 28 states and 1626 transitions. [2021-12-16 02:42:56,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 146 transitions, 2267 flow [2021-12-16 02:42:56,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 146 transitions, 1797 flow, removed 224 selfloop flow, removed 12 redundant places. [2021-12-16 02:42:56,662 INFO L242 Difference]: Finished difference. Result has 148 places, 105 transitions, 1045 flow [2021-12-16 02:42:56,663 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1045, PETRI_PLACES=148, PETRI_TRANSITIONS=105} [2021-12-16 02:42:56,663 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 78 predicate places. [2021-12-16 02:42:56,664 INFO L470 AbstractCegarLoop]: Abstraction has has 148 places, 105 transitions, 1045 flow [2021-12-16 02:42:56,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 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) [2021-12-16 02:42:56,664 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:56,665 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:42:56,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:42:56,879 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,SelfDestructingSolverStorable6 [2021-12-16 02:42:56,880 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:56,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1879270176, now seen corresponding path program 1 times [2021-12-16 02:42:56,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:56,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107672669] [2021-12-16 02:42:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:56,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:56,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:56,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107672669] [2021-12-16 02:42:56,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107672669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:56,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723027846] [2021-12-16 02:42:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:56,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:56,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:56,964 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) [2021-12-16 02:42:56,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:42:57,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 02:42:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:57,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:57,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723027846] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:57,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:57,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2021-12-16 02:42:57,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771539464] [2021-12-16 02:42:57,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:57,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 02:42:57,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:57,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 02:42:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:42:57,367 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:57,367 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 105 transitions, 1045 flow. Second operand has 16 states, 16 states have (on average 56.5625) internal successors, (905), 16 states have internal predecessors, (905), 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) [2021-12-16 02:42:57,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:57,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:57,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:57,744 INFO L129 PetriNetUnfolder]: 99/546 cut-off events. [2021-12-16 02:42:57,745 INFO L130 PetriNetUnfolder]: For 18427/18707 co-relation queries the response was YES. [2021-12-16 02:42:57,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3166 conditions, 546 events. 99/546 cut-off events. For 18427/18707 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3025 event pairs, 2 based on Foata normal form. 31/523 useless extension candidates. Maximal degree in co-relation 3084. Up to 135 conditions per place. [2021-12-16 02:42:57,752 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 32 selfloop transitions, 65 changer transitions 23/165 dead transitions. [2021-12-16 02:42:57,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 165 transitions, 3448 flow [2021-12-16 02:42:57,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-16 02:42:57,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-12-16 02:42:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1679 transitions. [2021-12-16 02:42:57,756 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8270935960591133 [2021-12-16 02:42:57,756 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1679 transitions. [2021-12-16 02:42:57,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1679 transitions. [2021-12-16 02:42:57,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:57,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1679 transitions. [2021-12-16 02:42:57,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 57.89655172413793) internal successors, (1679), 29 states have internal predecessors, (1679), 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) [2021-12-16 02:42:57,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 70.0) internal successors, (2100), 30 states have internal predecessors, (2100), 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) [2021-12-16 02:42:57,762 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 70.0) internal successors, (2100), 30 states have internal predecessors, (2100), 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) [2021-12-16 02:42:57,763 INFO L186 Difference]: Start difference. First operand has 148 places, 105 transitions, 1045 flow. Second operand 29 states and 1679 transitions. [2021-12-16 02:42:57,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 165 transitions, 3448 flow [2021-12-16 02:42:57,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 165 transitions, 2887 flow, removed 274 selfloop flow, removed 10 redundant places. [2021-12-16 02:42:57,785 INFO L242 Difference]: Finished difference. Result has 176 places, 127 transitions, 1611 flow [2021-12-16 02:42:57,785 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1611, PETRI_PLACES=176, PETRI_TRANSITIONS=127} [2021-12-16 02:42:57,786 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 106 predicate places. [2021-12-16 02:42:57,786 INFO L470 AbstractCegarLoop]: Abstraction has has 176 places, 127 transitions, 1611 flow [2021-12-16 02:42:57,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 56.5625) internal successors, (905), 16 states have internal predecessors, (905), 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) [2021-12-16 02:42:57,787 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:57,787 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:42:57,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:42:58,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:58,007 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:58,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1375112713, now seen corresponding path program 2 times [2021-12-16 02:42:58,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:58,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636989818] [2021-12-16 02:42:58,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:58,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:58,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:58,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636989818] [2021-12-16 02:42:58,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636989818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770108199] [2021-12-16 02:42:58,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:42:58,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:58,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:58,079 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) [2021-12-16 02:42:58,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:42:58,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:42:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:42:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 02:42:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:58,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:42:58,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770108199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:58,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:58,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-12-16 02:42:58,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751532138] [2021-12-16 02:42:58,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:58,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-16 02:42:58,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-16 02:42:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:42:58,413 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:58,414 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 127 transitions, 1611 flow. Second operand has 17 states, 17 states have (on average 56.529411764705884) internal successors, (961), 17 states have internal predecessors, (961), 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) [2021-12-16 02:42:58,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:58,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:58,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:42:58,949 INFO L129 PetriNetUnfolder]: 134/776 cut-off events. [2021-12-16 02:42:58,949 INFO L130 PetriNetUnfolder]: For 44131/44406 co-relation queries the response was YES. [2021-12-16 02:42:58,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5280 conditions, 776 events. 134/776 cut-off events. For 44131/44406 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 4850 event pairs, 0 based on Foata normal form. 49/751 useless extension candidates. Maximal degree in co-relation 5187. Up to 188 conditions per place. [2021-12-16 02:42:58,959 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 44 selfloop transitions, 106 changer transitions 29/224 dead transitions. [2021-12-16 02:42:58,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 224 transitions, 6091 flow [2021-12-16 02:42:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-16 02:42:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-12-16 02:42:58,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2021-12-16 02:42:58,962 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-12-16 02:42:58,962 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2021-12-16 02:42:58,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2021-12-16 02:42:58,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:42:58,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2021-12-16 02:42:58,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 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) [2021-12-16 02:42:58,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 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) [2021-12-16 02:42:58,968 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 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) [2021-12-16 02:42:58,968 INFO L186 Difference]: Start difference. First operand has 176 places, 127 transitions, 1611 flow. Second operand 36 states and 2085 transitions. [2021-12-16 02:42:58,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 224 transitions, 6091 flow [2021-12-16 02:42:59,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 224 transitions, 4843 flow, removed 595 selfloop flow, removed 17 redundant places. [2021-12-16 02:42:59,012 INFO L242 Difference]: Finished difference. Result has 208 places, 169 transitions, 2627 flow [2021-12-16 02:42:59,012 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2627, PETRI_PLACES=208, PETRI_TRANSITIONS=169} [2021-12-16 02:42:59,013 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 138 predicate places. [2021-12-16 02:42:59,013 INFO L470 AbstractCegarLoop]: Abstraction has has 208 places, 169 transitions, 2627 flow [2021-12-16 02:42:59,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.529411764705884) internal successors, (961), 17 states have internal predecessors, (961), 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) [2021-12-16 02:42:59,014 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:42:59,014 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 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] [2021-12-16 02:42:59,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:42:59,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:59,227 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:42:59,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:42:59,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1020208377, now seen corresponding path program 3 times [2021-12-16 02:42:59,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:42:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556139719] [2021-12-16 02:42:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:42:59,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:42:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:42:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:59,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:42:59,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556139719] [2021-12-16 02:42:59,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556139719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:42:59,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864716230] [2021-12-16 02:42:59,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 02:42:59,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:42:59,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:42:59,308 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) [2021-12-16 02:42:59,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:42:59,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-16 02:42:59,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:42:59,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 02:42:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:42:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:59,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:42:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:42:59,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864716230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:42:59,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:42:59,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2021-12-16 02:42:59,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932259442] [2021-12-16 02:42:59,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:42:59,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 02:42:59,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:42:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 02:42:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-12-16 02:42:59,705 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:42:59,706 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 169 transitions, 2627 flow. Second operand has 22 states, 22 states have (on average 56.45454545454545) internal successors, (1242), 22 states have internal predecessors, (1242), 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) [2021-12-16 02:42:59,706 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:42:59,706 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:42:59,706 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:00,472 INFO L129 PetriNetUnfolder]: 216/1345 cut-off events. [2021-12-16 02:43:00,472 INFO L130 PetriNetUnfolder]: For 99011/99308 co-relation queries the response was YES. [2021-12-16 02:43:00,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9841 conditions, 1345 events. 216/1345 cut-off events. For 99011/99308 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 9433 event pairs, 0 based on Foata normal form. 54/1263 useless extension candidates. Maximal degree in co-relation 9734. Up to 298 conditions per place. [2021-12-16 02:43:00,520 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 180 changer transitions 26/309 dead transitions. [2021-12-16 02:43:00,520 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 309 transitions, 9989 flow [2021-12-16 02:43:00,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-16 02:43:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-12-16 02:43:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2431 transitions. [2021-12-16 02:43:00,523 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8268707482993197 [2021-12-16 02:43:00,523 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2431 transitions. [2021-12-16 02:43:00,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2431 transitions. [2021-12-16 02:43:00,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:00,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2431 transitions. [2021-12-16 02:43:00,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.88095238095238) internal successors, (2431), 42 states have internal predecessors, (2431), 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) [2021-12-16 02:43:00,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 70.0) internal successors, (3010), 43 states have internal predecessors, (3010), 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) [2021-12-16 02:43:00,531 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 70.0) internal successors, (3010), 43 states have internal predecessors, (3010), 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) [2021-12-16 02:43:00,531 INFO L186 Difference]: Start difference. First operand has 208 places, 169 transitions, 2627 flow. Second operand 42 states and 2431 transitions. [2021-12-16 02:43:00,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 309 transitions, 9989 flow [2021-12-16 02:43:00,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 309 transitions, 7654 flow, removed 1134 selfloop flow, removed 24 redundant places. [2021-12-16 02:43:00,634 INFO L242 Difference]: Finished difference. Result has 241 places, 251 transitions, 4668 flow [2021-12-16 02:43:00,635 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4668, PETRI_PLACES=241, PETRI_TRANSITIONS=251} [2021-12-16 02:43:00,636 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 171 predicate places. [2021-12-16 02:43:00,636 INFO L470 AbstractCegarLoop]: Abstraction has has 241 places, 251 transitions, 4668 flow [2021-12-16 02:43:00,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.45454545454545) internal successors, (1242), 22 states have internal predecessors, (1242), 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) [2021-12-16 02:43:00,637 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:00,637 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:00,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 02:43:00,850 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,SelfDestructingSolverStorable9 [2021-12-16 02:43:00,850 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:00,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:00,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1794679756, now seen corresponding path program 4 times [2021-12-16 02:43:00,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:00,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553200951] [2021-12-16 02:43:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:00,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:01,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:01,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553200951] [2021-12-16 02:43:01,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553200951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:01,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255118200] [2021-12-16 02:43:01,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 02:43:01,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:01,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:01,034 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) [2021-12-16 02:43:01,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 02:43:01,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 02:43:01,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:01,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 02:43:01,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:01,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:01,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255118200] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:01,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:01,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-12-16 02:43:01,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666123219] [2021-12-16 02:43:01,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:01,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 02:43:01,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:01,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 02:43:01,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 02:43:01,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:01,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 251 transitions, 4668 flow. Second operand has 33 states, 33 states have (on average 56.333333333333336) internal successors, (1859), 33 states have internal predecessors, (1859), 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) [2021-12-16 02:43:01,962 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:01,962 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:01,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:02,979 INFO L129 PetriNetUnfolder]: 258/1681 cut-off events. [2021-12-16 02:43:02,979 INFO L130 PetriNetUnfolder]: For 168548/168814 co-relation queries the response was YES. [2021-12-16 02:43:02,991 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13361 conditions, 1681 events. 258/1681 cut-off events. For 168548/168814 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 10930 event pairs, 0 based on Foata normal form. 37/1536 useless extension candidates. Maximal degree in co-relation 13241. Up to 366 conditions per place. [2021-12-16 02:43:03,004 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 218 selfloop transitions, 45 changer transitions 50/358 dead transitions. [2021-12-16 02:43:03,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 358 transitions, 13268 flow [2021-12-16 02:43:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-16 02:43:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-12-16 02:43:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2834 transitions. [2021-12-16 02:43:03,007 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8262390670553936 [2021-12-16 02:43:03,008 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2834 transitions. [2021-12-16 02:43:03,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2834 transitions. [2021-12-16 02:43:03,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:03,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2834 transitions. [2021-12-16 02:43:03,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.83673469387755) internal successors, (2834), 49 states have internal predecessors, (2834), 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) [2021-12-16 02:43:03,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 70.0) internal successors, (3500), 50 states have internal predecessors, (3500), 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) [2021-12-16 02:43:03,016 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 70.0) internal successors, (3500), 50 states have internal predecessors, (3500), 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) [2021-12-16 02:43:03,016 INFO L186 Difference]: Start difference. First operand has 241 places, 251 transitions, 4668 flow. Second operand 49 states and 2834 transitions. [2021-12-16 02:43:03,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 358 transitions, 13268 flow [2021-12-16 02:43:03,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 358 transitions, 10792 flow, removed 1188 selfloop flow, removed 22 redundant places. [2021-12-16 02:43:03,187 INFO L242 Difference]: Finished difference. Result has 295 places, 277 transitions, 5175 flow [2021-12-16 02:43:03,187 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=5175, PETRI_PLACES=295, PETRI_TRANSITIONS=277} [2021-12-16 02:43:03,188 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 225 predicate places. [2021-12-16 02:43:03,188 INFO L470 AbstractCegarLoop]: Abstraction has has 295 places, 277 transitions, 5175 flow [2021-12-16 02:43:03,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.333333333333336) internal successors, (1859), 33 states have internal predecessors, (1859), 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) [2021-12-16 02:43:03,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:03,189 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:03,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:03,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:03,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2035951210, now seen corresponding path program 5 times [2021-12-16 02:43:03,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:03,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728333053] [2021-12-16 02:43:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:03,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:03,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:03,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728333053] [2021-12-16 02:43:03,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728333053] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:03,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601374251] [2021-12-16 02:43:03,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 02:43:03,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:03,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:03,597 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) [2021-12-16 02:43:03,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 02:43:03,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-16 02:43:03,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 02:43:03,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:03,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:04,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601374251] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:04,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:04,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2021-12-16 02:43:04,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368810905] [2021-12-16 02:43:04,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:04,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 02:43:04,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:04,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 02:43:04,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 02:43:04,542 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:04,544 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 277 transitions, 5175 flow. Second operand has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 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) [2021-12-16 02:43:04,544 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:04,544 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:04,544 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:05,880 INFO L129 PetriNetUnfolder]: 317/2170 cut-off events. [2021-12-16 02:43:05,880 INFO L130 PetriNetUnfolder]: For 316039/316474 co-relation queries the response was YES. [2021-12-16 02:43:05,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18998 conditions, 2170 events. 317/2170 cut-off events. For 316039/316474 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 15659 event pairs, 0 based on Foata normal form. 44/1976 useless extension candidates. Maximal degree in co-relation 18853. Up to 483 conditions per place. [2021-12-16 02:43:05,926 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 188 selfloop transitions, 142 changer transitions 50/425 dead transitions. [2021-12-16 02:43:05,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 425 transitions, 16656 flow [2021-12-16 02:43:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-16 02:43:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-12-16 02:43:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3235 transitions. [2021-12-16 02:43:05,930 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8252551020408163 [2021-12-16 02:43:05,930 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3235 transitions. [2021-12-16 02:43:05,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3235 transitions. [2021-12-16 02:43:05,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:05,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3235 transitions. [2021-12-16 02:43:05,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 57.767857142857146) internal successors, (3235), 56 states have internal predecessors, (3235), 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) [2021-12-16 02:43:05,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 70.0) internal successors, (3990), 57 states have internal predecessors, (3990), 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) [2021-12-16 02:43:05,939 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 70.0) internal successors, (3990), 57 states have internal predecessors, (3990), 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) [2021-12-16 02:43:05,939 INFO L186 Difference]: Start difference. First operand has 295 places, 277 transitions, 5175 flow. Second operand 56 states and 3235 transitions. [2021-12-16 02:43:05,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 425 transitions, 16656 flow [2021-12-16 02:43:06,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 425 transitions, 14373 flow, removed 1123 selfloop flow, removed 28 redundant places. [2021-12-16 02:43:06,407 INFO L242 Difference]: Finished difference. Result has 340 places, 339 transitions, 7175 flow [2021-12-16 02:43:06,407 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4220, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=7175, PETRI_PLACES=340, PETRI_TRANSITIONS=339} [2021-12-16 02:43:06,408 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 270 predicate places. [2021-12-16 02:43:06,408 INFO L470 AbstractCegarLoop]: Abstraction has has 340 places, 339 transitions, 7175 flow [2021-12-16 02:43:06,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.35294117647059) internal successors, (1916), 34 states have internal predecessors, (1916), 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) [2021-12-16 02:43:06,408 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:06,409 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:06,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:06,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:06,623 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:06,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash -620052250, now seen corresponding path program 6 times [2021-12-16 02:43:06,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:06,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649587588] [2021-12-16 02:43:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:06,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:43:06,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649587588] [2021-12-16 02:43:06,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649587588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:06,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105622370] [2021-12-16 02:43:06,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 02:43:06,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:06,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:06,817 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) [2021-12-16 02:43:06,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 02:43:06,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-16 02:43:06,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 02:43:06,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 4 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:43:07,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 178 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 02:43:07,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105622370] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:07,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:07,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2021-12-16 02:43:07,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188134668] [2021-12-16 02:43:07,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:07,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-16 02:43:07,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-16 02:43:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-12-16 02:43:07,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:07,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 339 transitions, 7175 flow. Second operand has 34 states, 34 states have (on average 56.3235294117647) internal successors, (1915), 34 states have internal predecessors, (1915), 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) [2021-12-16 02:43:07,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:07,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:07,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:09,430 INFO L129 PetriNetUnfolder]: 431/2973 cut-off events. [2021-12-16 02:43:09,430 INFO L130 PetriNetUnfolder]: For 600009/601296 co-relation queries the response was YES. [2021-12-16 02:43:09,461 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29613 conditions, 2973 events. 431/2973 cut-off events. For 600009/601296 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 24717 event pairs, 0 based on Foata normal form. 76/2736 useless extension candidates. Maximal degree in co-relation 29449. Up to 685 conditions per place. [2021-12-16 02:43:09,487 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 82 selfloop transitions, 378 changer transitions 50/555 dead transitions. [2021-12-16 02:43:09,487 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 555 transitions, 23501 flow [2021-12-16 02:43:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-16 02:43:09,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-12-16 02:43:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3699 transitions. [2021-12-16 02:43:09,556 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256696428571428 [2021-12-16 02:43:09,556 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3699 transitions. [2021-12-16 02:43:09,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3699 transitions. [2021-12-16 02:43:09,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:09,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3699 transitions. [2021-12-16 02:43:09,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 57.796875) internal successors, (3699), 64 states have internal predecessors, (3699), 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) [2021-12-16 02:43:09,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 70.0) internal successors, (4550), 65 states have internal predecessors, (4550), 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) [2021-12-16 02:43:09,568 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 70.0) internal successors, (4550), 65 states have internal predecessors, (4550), 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) [2021-12-16 02:43:09,569 INFO L186 Difference]: Start difference. First operand has 340 places, 339 transitions, 7175 flow. Second operand 64 states and 3699 transitions. [2021-12-16 02:43:09,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 555 transitions, 23501 flow [2021-12-16 02:43:10,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 555 transitions, 20484 flow, removed 1491 selfloop flow, removed 26 redundant places. [2021-12-16 02:43:10,702 INFO L242 Difference]: Finished difference. Result has 398 places, 460 transitions, 11271 flow [2021-12-16 02:43:10,702 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=11271, PETRI_PLACES=398, PETRI_TRANSITIONS=460} [2021-12-16 02:43:10,703 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 328 predicate places. [2021-12-16 02:43:10,703 INFO L470 AbstractCegarLoop]: Abstraction has has 398 places, 460 transitions, 11271 flow [2021-12-16 02:43:10,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.3235294117647) internal successors, (1915), 34 states have internal predecessors, (1915), 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) [2021-12-16 02:43:10,704 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:10,704 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:10,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:10,904 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,SelfDestructingSolverStorable12 [2021-12-16 02:43:10,905 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:10,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1824928014, now seen corresponding path program 7 times [2021-12-16 02:43:10,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:10,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799845943] [2021-12-16 02:43:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:10,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:11,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:11,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799845943] [2021-12-16 02:43:11,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799845943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:11,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422044002] [2021-12-16 02:43:11,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 02:43:11,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:11,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:11,056 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) [2021-12-16 02:43:11,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 02:43:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:11,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 02:43:11,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:11,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:11,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422044002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:11,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:11,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2021-12-16 02:43:11,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418125625] [2021-12-16 02:43:11,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:11,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 02:43:11,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 02:43:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=814, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 02:43:11,706 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:11,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 460 transitions, 11271 flow. Second operand has 33 states, 33 states have (on average 56.333333333333336) internal successors, (1859), 33 states have internal predecessors, (1859), 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) [2021-12-16 02:43:11,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:11,707 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:11,707 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:14,254 INFO L129 PetriNetUnfolder]: 519/3641 cut-off events. [2021-12-16 02:43:14,254 INFO L130 PetriNetUnfolder]: For 992943/993640 co-relation queries the response was YES. [2021-12-16 02:43:14,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40555 conditions, 3641 events. 519/3641 cut-off events. For 992943/993640 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 31129 event pairs, 0 based on Foata normal form. 85/3343 useless extension candidates. Maximal degree in co-relation 40369. Up to 809 conditions per place. [2021-12-16 02:43:14,326 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 87 selfloop transitions, 474 changer transitions 50/656 dead transitions. [2021-12-16 02:43:14,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 656 transitions, 32679 flow [2021-12-16 02:43:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-16 02:43:14,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-16 02:43:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4397 transitions. [2021-12-16 02:43:14,331 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8265037593984963 [2021-12-16 02:43:14,331 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4397 transitions. [2021-12-16 02:43:14,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4397 transitions. [2021-12-16 02:43:14,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:14,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4397 transitions. [2021-12-16 02:43:14,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 57.85526315789474) internal successors, (4397), 76 states have internal predecessors, (4397), 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) [2021-12-16 02:43:14,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 70.0) internal successors, (5390), 77 states have internal predecessors, (5390), 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) [2021-12-16 02:43:14,343 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 70.0) internal successors, (5390), 77 states have internal predecessors, (5390), 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) [2021-12-16 02:43:14,343 INFO L186 Difference]: Start difference. First operand has 398 places, 460 transitions, 11271 flow. Second operand 76 states and 4397 transitions. [2021-12-16 02:43:14,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 656 transitions, 32679 flow [2021-12-16 02:43:16,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 656 transitions, 25757 flow, removed 3422 selfloop flow, removed 32 redundant places. [2021-12-16 02:43:16,027 INFO L242 Difference]: Finished difference. Result has 471 places, 549 transitions, 14696 flow [2021-12-16 02:43:16,028 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9079, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=14696, PETRI_PLACES=471, PETRI_TRANSITIONS=549} [2021-12-16 02:43:16,029 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 401 predicate places. [2021-12-16 02:43:16,029 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 549 transitions, 14696 flow [2021-12-16 02:43:16,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.333333333333336) internal successors, (1859), 33 states have internal predecessors, (1859), 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) [2021-12-16 02:43:16,029 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:16,030 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 12, 12, 12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:16,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:16,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-16 02:43:16,247 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1441585909, now seen corresponding path program 8 times [2021-12-16 02:43:16,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:16,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679846681] [2021-12-16 02:43:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:16,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:16,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:16,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679846681] [2021-12-16 02:43:16,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679846681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:16,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188978090] [2021-12-16 02:43:16,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 02:43:16,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:16,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:16,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:16,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 02:43:16,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 02:43:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:16,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-16 02:43:16,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:16,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:43:17,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188978090] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:17,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:17,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2021-12-16 02:43:17,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986589230] [2021-12-16 02:43:17,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:17,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-16 02:43:17,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-16 02:43:17,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=1592, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 02:43:17,483 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:17,485 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 549 transitions, 14696 flow. Second operand has 46 states, 46 states have (on average 56.23913043478261) internal successors, (2587), 46 states have internal predecessors, (2587), 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) [2021-12-16 02:43:17,485 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:17,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:17,485 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:21,532 INFO L129 PetriNetUnfolder]: 702/4737 cut-off events. [2021-12-16 02:43:21,533 INFO L130 PetriNetUnfolder]: For 1651998/1653507 co-relation queries the response was YES. [2021-12-16 02:43:21,586 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60101 conditions, 4737 events. 702/4737 cut-off events. For 1651998/1653507 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 40107 event pairs, 0 based on Foata normal form. 96/4337 useless extension candidates. Maximal degree in co-relation 59887. Up to 1053 conditions per place. [2021-12-16 02:43:21,633 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 109 selfloop transitions, 661 changer transitions 53/868 dead transitions. [2021-12-16 02:43:21,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 868 transitions, 50567 flow [2021-12-16 02:43:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-16 02:43:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-12-16 02:43:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 5837 transitions. [2021-12-16 02:43:21,638 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8256011315417257 [2021-12-16 02:43:21,639 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 5837 transitions. [2021-12-16 02:43:21,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 5837 transitions. [2021-12-16 02:43:21,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:21,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 5837 transitions. [2021-12-16 02:43:21,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 57.79207920792079) internal successors, (5837), 101 states have internal predecessors, (5837), 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) [2021-12-16 02:43:21,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 70.0) internal successors, (7140), 102 states have internal predecessors, (7140), 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) [2021-12-16 02:43:21,654 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 70.0) internal successors, (7140), 102 states have internal predecessors, (7140), 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) [2021-12-16 02:43:21,655 INFO L186 Difference]: Start difference. First operand has 471 places, 549 transitions, 14696 flow. Second operand 101 states and 5837 transitions. [2021-12-16 02:43:21,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 868 transitions, 50567 flow [2021-12-16 02:43:23,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 868 transitions, 38044 flow, removed 6137 selfloop flow, removed 39 redundant places. [2021-12-16 02:43:23,922 INFO L242 Difference]: Finished difference. Result has 571 places, 732 transitions, 20403 flow [2021-12-16 02:43:23,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=11399, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=20403, PETRI_PLACES=571, PETRI_TRANSITIONS=732} [2021-12-16 02:43:23,923 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 501 predicate places. [2021-12-16 02:43:23,923 INFO L470 AbstractCegarLoop]: Abstraction has has 571 places, 732 transitions, 20403 flow [2021-12-16 02:43:23,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 56.23913043478261) internal successors, (2587), 46 states have internal predecessors, (2587), 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) [2021-12-16 02:43:23,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:23,924 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:23,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:24,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 02:43:24,142 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:24,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1356186340, now seen corresponding path program 9 times [2021-12-16 02:43:24,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:24,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637216438] [2021-12-16 02:43:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:24,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:24,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637216438] [2021-12-16 02:43:24,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637216438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:24,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206883579] [2021-12-16 02:43:24,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 02:43:24,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:24,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:24,791 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:24,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 02:43:24,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-12-16 02:43:24,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:24,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 02:43:24,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:25,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:27,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206883579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:27,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:27,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 85 [2021-12-16 02:43:27,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306911181] [2021-12-16 02:43:27,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:27,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-16 02:43:27,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:27,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-16 02:43:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1732, Invalid=5408, Unknown=0, NotChecked=0, Total=7140 [2021-12-16 02:43:27,298 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:27,300 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 732 transitions, 20403 flow. Second operand has 85 states, 85 states have (on average 56.09411764705882) internal successors, (4768), 85 states have internal predecessors, (4768), 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) [2021-12-16 02:43:27,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:27,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:27,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:30,378 INFO L129 PetriNetUnfolder]: 690/4858 cut-off events. [2021-12-16 02:43:30,378 INFO L130 PetriNetUnfolder]: For 2276585/2277105 co-relation queries the response was YES. [2021-12-16 02:43:30,447 INFO L84 FinitePrefix]: Finished finitePrefix Result has 63785 conditions, 4858 events. 690/4858 cut-off events. For 2276585/2277105 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 40908 event pairs, 0 based on Foata normal form. 31/4364 useless extension candidates. Maximal degree in co-relation 63531. Up to 1119 conditions per place. [2021-12-16 02:43:30,501 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 687 selfloop transitions, 59 changer transitions 14/805 dead transitions. [2021-12-16 02:43:30,501 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 805 transitions, 34608 flow [2021-12-16 02:43:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-16 02:43:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-12-16 02:43:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2924 transitions. [2021-12-16 02:43:30,504 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.819047619047619 [2021-12-16 02:43:30,504 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2924 transitions. [2021-12-16 02:43:30,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2924 transitions. [2021-12-16 02:43:30,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:30,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2924 transitions. [2021-12-16 02:43:30,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.333333333333336) internal successors, (2924), 51 states have internal predecessors, (2924), 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) [2021-12-16 02:43:30,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 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) [2021-12-16 02:43:30,511 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 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) [2021-12-16 02:43:30,511 INFO L186 Difference]: Start difference. First operand has 571 places, 732 transitions, 20403 flow. Second operand 51 states and 2924 transitions. [2021-12-16 02:43:30,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 805 transitions, 34608 flow [2021-12-16 02:43:36,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 805 transitions, 27355 flow, removed 3543 selfloop flow, removed 33 redundant places. [2021-12-16 02:43:36,514 INFO L242 Difference]: Finished difference. Result has 589 places, 746 transitions, 16519 flow [2021-12-16 02:43:36,514 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=15504, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=16519, PETRI_PLACES=589, PETRI_TRANSITIONS=746} [2021-12-16 02:43:36,515 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 519 predicate places. [2021-12-16 02:43:36,515 INFO L470 AbstractCegarLoop]: Abstraction has has 589 places, 746 transitions, 16519 flow [2021-12-16 02:43:36,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 56.09411764705882) internal successors, (4768), 85 states have internal predecessors, (4768), 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) [2021-12-16 02:43:36,516 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:36,516 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:36,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:36,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-16 02:43:36,734 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:36,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1190348046, now seen corresponding path program 10 times [2021-12-16 02:43:36,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:36,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491906811] [2021-12-16 02:43:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:36,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:37,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:37,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491906811] [2021-12-16 02:43:37,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491906811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052224497] [2021-12-16 02:43:37,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 02:43:37,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:37,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:37,431 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:37,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 02:43:37,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 02:43:37,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:37,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 02:43:37,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:38,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:39,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052224497] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:39,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:39,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-16 02:43:39,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838419863] [2021-12-16 02:43:39,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:39,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-16 02:43:39,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-16 02:43:39,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1659, Invalid=5651, Unknown=0, NotChecked=0, Total=7310 [2021-12-16 02:43:39,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:39,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 746 transitions, 16519 flow. Second operand has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 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) [2021-12-16 02:43:39,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:39,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:39,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 02:43:44,208 INFO L129 PetriNetUnfolder]: 760/5451 cut-off events. [2021-12-16 02:43:44,208 INFO L130 PetriNetUnfolder]: For 2192919/2193627 co-relation queries the response was YES. [2021-12-16 02:43:44,286 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65730 conditions, 5451 events. 760/5451 cut-off events. For 2192919/2193627 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 46431 event pairs, 0 based on Foata normal form. 44/4905 useless extension candidates. Maximal degree in co-relation 65475. Up to 1191 conditions per place. [2021-12-16 02:43:44,344 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 629 selfloop transitions, 226 changer transitions 20/920 dead transitions. [2021-12-16 02:43:44,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 920 transitions, 38740 flow [2021-12-16 02:43:44,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-12-16 02:43:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-12-16 02:43:44,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5609 transitions. [2021-12-16 02:43:44,348 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8176384839650146 [2021-12-16 02:43:44,348 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5609 transitions. [2021-12-16 02:43:44,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5609 transitions. [2021-12-16 02:43:44,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 02:43:44,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5609 transitions. [2021-12-16 02:43:44,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 57.234693877551024) internal successors, (5609), 98 states have internal predecessors, (5609), 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) [2021-12-16 02:43:44,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 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) [2021-12-16 02:43:44,361 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 70.0) internal successors, (6930), 99 states have internal predecessors, (6930), 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) [2021-12-16 02:43:44,361 INFO L186 Difference]: Start difference. First operand has 589 places, 746 transitions, 16519 flow. Second operand 98 states and 5609 transitions. [2021-12-16 02:43:44,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 920 transitions, 38740 flow [2021-12-16 02:43:48,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 920 transitions, 37608 flow, removed 521 selfloop flow, removed 36 redundant places. [2021-12-16 02:43:48,922 INFO L242 Difference]: Finished difference. Result has 674 places, 812 transitions, 18756 flow [2021-12-16 02:43:48,924 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=15803, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=18756, PETRI_PLACES=674, PETRI_TRANSITIONS=812} [2021-12-16 02:43:48,924 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 604 predicate places. [2021-12-16 02:43:48,924 INFO L470 AbstractCegarLoop]: Abstraction has has 674 places, 812 transitions, 18756 flow [2021-12-16 02:43:48,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 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) [2021-12-16 02:43:48,925 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 02:43:48,925 INFO L254 CegarLoopForPetriNet]: trace histogram [20, 20, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:43:48,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 02:43:49,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 02:43:49,134 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 02:43:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:43:49,134 INFO L85 PathProgramCache]: Analyzing trace with hash 422781118, now seen corresponding path program 11 times [2021-12-16 02:43:49,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:43:49,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533957412] [2021-12-16 02:43:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:43:49,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:43:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:43:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:49,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:43:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533957412] [2021-12-16 02:43:49,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533957412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:43:49,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279915809] [2021-12-16 02:43:49,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 02:43:49,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:43:49,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:43:49,755 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:43:49,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 02:43:49,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-12-16 02:43:49,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 02:43:49,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 02:43:49,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:43:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:50,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:43:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:43:51,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279915809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:43:51,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:43:51,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 86 [2021-12-16 02:43:51,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156298324] [2021-12-16 02:43:51,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:43:51,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-16 02:43:51,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:43:51,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-16 02:43:51,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1279, Invalid=6031, Unknown=0, NotChecked=0, Total=7310 [2021-12-16 02:43:51,965 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-12-16 02:43:51,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 812 transitions, 18756 flow. Second operand has 86 states, 86 states have (on average 56.104651162790695) internal successors, (4825), 86 states have internal predecessors, (4825), 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) [2021-12-16 02:43:51,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 02:43:51,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-12-16 02:43:51,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand