./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c --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/weaver/popl20-nonblocking-cntr-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 03:08:09,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 03:08:09,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 03:08:09,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 03:08:09,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 03:08:09,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 03:08:09,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 03:08:09,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 03:08:09,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 03:08:09,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 03:08:09,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 03:08:09,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 03:08:09,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 03:08:09,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 03:08:09,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 03:08:09,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 03:08:09,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 03:08:09,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 03:08:09,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 03:08:09,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 03:08:09,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 03:08:09,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 03:08:09,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 03:08:09,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 03:08:09,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 03:08:09,145 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 03:08:09,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 03:08:09,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 03:08:09,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 03:08:09,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 03:08:09,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 03:08:09,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 03:08:09,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 03:08:09,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 03:08:09,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 03:08:09,152 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 03:08:09,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 03:08:09,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 03:08:09,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 03:08:09,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 03:08:09,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 03:08:09,154 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 03:08:09,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 03:08:09,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 03:08:09,179 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 03:08:09,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 03:08:09,180 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 03:08:09,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 03:08:09,181 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 03:08:09,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 03:08:09,181 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 03:08:09,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 03:08:09,182 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 03:08:09,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 03:08:09,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 03:08:09,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 03:08:09,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 03:08:09,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 03:08:09,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 03:08:09,183 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 03:08:09,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 03:08:09,183 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 03:08:09,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 03:08:09,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 03:08:09,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 03:08:09,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 03:08:09,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:08:09,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 03:08:09,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 03:08:09,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 03:08:09,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 03:08:09,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 03:08:09,185 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 03:08:09,185 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 03:08:09,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 03:08:09,186 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 03:08:09,186 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfec19cb420bdcc992ee0af7789c6701a360457d4b79eebd70c54f4e314fbf3f [2021-12-16 03:08:09,395 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 03:08:09,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 03:08:09,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 03:08:09,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 03:08:09,419 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 03:08:09,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-16 03:08:09,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e979e253/7bbc9d0c659a4f5fb97ebe83794cdacd/FLAGf561eb437 [2021-12-16 03:08:09,857 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 03:08:09,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c [2021-12-16 03:08:09,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e979e253/7bbc9d0c659a4f5fb97ebe83794cdacd/FLAGf561eb437 [2021-12-16 03:08:09,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e979e253/7bbc9d0c659a4f5fb97ebe83794cdacd [2021-12-16 03:08:09,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 03:08:09,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 03:08:09,874 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 03:08:09,874 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 03:08:09,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 03:08:09,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:08:09" (1/1) ... [2021-12-16 03:08:09,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f4dfc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:09, skipping insertion in model container [2021-12-16 03:08:09,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 03:08:09" (1/1) ... [2021-12-16 03:08:09,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 03:08:09,892 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 03:08:10,024 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-16 03:08:10,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:08:10,031 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 03:08:10,057 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2021-12-16 03:08:10,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 03:08:10,070 INFO L208 MainTranslator]: Completed translation [2021-12-16 03:08:10,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10 WrapperNode [2021-12-16 03:08:10,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 03:08:10,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 03:08:10,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 03:08:10,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 03:08:10,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,106 INFO L137 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2021-12-16 03:08:10,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 03:08:10,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 03:08:10,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 03:08:10,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 03:08:10,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 03:08:10,149 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 03:08:10,149 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 03:08:10,149 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 03:08:10,150 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (1/1) ... [2021-12-16 03:08:10,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 03:08:10,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:10,176 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 03:08:10,184 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 03:08:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 03:08:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-16 03:08:10,210 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-16 03:08:10,210 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-16 03:08:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-16 03:08:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 03:08:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 03:08:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 03:08:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-16 03:08:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-16 03:08:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 03:08:10,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 03:08:10,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 03:08:10,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 03:08:10,213 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 03:08:10,258 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 03:08:10,260 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 03:08:10,363 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 03:08:10,387 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 03:08:10,387 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 03:08:10,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:08:10 BoogieIcfgContainer [2021-12-16 03:08:10,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 03:08:10,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 03:08:10,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 03:08:10,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 03:08:10,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 03:08:09" (1/3) ... [2021-12-16 03:08:10,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8301e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:08:10, skipping insertion in model container [2021-12-16 03:08:10,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 03:08:10" (2/3) ... [2021-12-16 03:08:10,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8301e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 03:08:10, skipping insertion in model container [2021-12-16 03:08:10,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 03:08:10" (3/3) ... [2021-12-16 03:08:10,394 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2021-12-16 03:08:10,398 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-16 03:08:10,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 03:08:10,398 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 03:08:10,398 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-16 03:08:10,418 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,419 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,419 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,419 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,419 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,420 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,420 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,421 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,421 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,421 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,422 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,422 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,422 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,423 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,423 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,423 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,423 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,424 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,424 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,424 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,425 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,425 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,425 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,426 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,426 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,426 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,429 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,429 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,430 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,430 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,431 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-16 03:08:10,433 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-16 03:08:10,465 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 03:08:10,470 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 03:08:10,471 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-16 03:08:10,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2021-12-16 03:08:10,515 INFO L129 PetriNetUnfolder]: 6/84 cut-off events. [2021-12-16 03:08:10,516 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:08:10,518 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2021-12-16 03:08:10,518 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2021-12-16 03:08:10,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 162 flow [2021-12-16 03:08:10,555 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-12-16 03:08:10,558 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-16 03:08:10,558 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:10,559 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:10,560 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1565492451, now seen corresponding path program 1 times [2021-12-16 03:08:10,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:10,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463195604] [2021-12-16 03:08:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:10,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:10,745 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 03:08:10,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:10,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463195604] [2021-12-16 03:08:10,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463195604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:10,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:10,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 03:08:10,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584341363] [2021-12-16 03:08:10,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:10,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 03:08:10,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 03:08:10,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 03:08:10,792 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 86 [2021-12-16 03:08:10,795 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 162 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 03:08:10,795 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:10,795 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 86 [2021-12-16 03:08:10,796 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:10,839 INFO L129 PetriNetUnfolder]: 10/97 cut-off events. [2021-12-16 03:08:10,839 INFO L130 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2021-12-16 03:08:10,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 97 events. 10/97 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 108 event pairs, 1 based on Foata normal form. 11/98 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2021-12-16 03:08:10,841 INFO L132 encePairwiseOnDemand]: 82/86 looper letters, 6 selfloop transitions, 0 changer transitions 2/71 dead transitions. [2021-12-16 03:08:10,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 166 flow [2021-12-16 03:08:10,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 03:08:10,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-16 03:08:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 160 transitions. [2021-12-16 03:08:10,851 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9302325581395349 [2021-12-16 03:08:10,853 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 160 transitions. [2021-12-16 03:08:10,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 160 transitions. [2021-12-16 03:08:10,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:10,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 160 transitions. [2021-12-16 03:08:10,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 03:08:10,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 03:08:10,861 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 03:08:10,862 INFO L186 Difference]: Start difference. First operand has 76 places, 75 transitions, 162 flow. Second operand 2 states and 160 transitions. [2021-12-16 03:08:10,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 166 flow [2021-12-16 03:08:10,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:08:10,874 INFO L242 Difference]: Finished difference. Result has 73 places, 69 transitions, 142 flow [2021-12-16 03:08:10,878 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=142, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2021-12-16 03:08:10,881 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, -3 predicate places. [2021-12-16 03:08:10,883 INFO L470 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 142 flow [2021-12-16 03:08:10,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 03:08:10,884 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:10,884 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:10,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 03:08:10,884 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:10,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash -305653797, now seen corresponding path program 1 times [2021-12-16 03:08:10,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:10,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344611489] [2021-12-16 03:08:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:10,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:11,134 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 03:08:11,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344611489] [2021-12-16 03:08:11,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344611489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 03:08:11,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 03:08:11,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 03:08:11,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167760682] [2021-12-16 03:08:11,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 03:08:11,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 03:08:11,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 03:08:11,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 03:08:11,138 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 86 [2021-12-16 03:08:11,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 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 03:08:11,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:11,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 86 [2021-12-16 03:08:11,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:11,259 INFO L129 PetriNetUnfolder]: 41/148 cut-off events. [2021-12-16 03:08:11,259 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-16 03:08:11,261 INFO L84 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 148 events. 41/148 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 367 event pairs, 13 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 240. Up to 58 conditions per place. [2021-12-16 03:08:11,263 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 24 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2021-12-16 03:08:11,263 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 213 flow [2021-12-16 03:08:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 03:08:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-16 03:08:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 366 transitions. [2021-12-16 03:08:11,272 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2021-12-16 03:08:11,272 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 366 transitions. [2021-12-16 03:08:11,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 366 transitions. [2021-12-16 03:08:11,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:11,276 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 366 transitions. [2021-12-16 03:08:11,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.0) internal successors, (366), 6 states have internal predecessors, (366), 0 states have call successors, (0), 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 03:08:11,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 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 03:08:11,281 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 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 03:08:11,281 INFO L186 Difference]: Start difference. First operand has 73 places, 69 transitions, 142 flow. Second operand 6 states and 366 transitions. [2021-12-16 03:08:11,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 213 flow [2021-12-16 03:08:11,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:08:11,284 INFO L242 Difference]: Finished difference. Result has 77 places, 70 transitions, 160 flow [2021-12-16 03:08:11,284 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2021-12-16 03:08:11,285 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2021-12-16 03:08:11,285 INFO L470 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 160 flow [2021-12-16 03:08:11,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 59.166666666666664) internal successors, (355), 6 states have internal predecessors, (355), 0 states have call successors, (0), 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 03:08:11,285 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:11,286 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:11,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 03:08:11,286 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:11,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:11,287 INFO L85 PathProgramCache]: Analyzing trace with hash -443057429, now seen corresponding path program 1 times [2021-12-16 03:08:11,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:11,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223898347] [2021-12-16 03:08:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:11,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:11,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:11,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223898347] [2021-12-16 03:08:11,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223898347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:11,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316854825] [2021-12-16 03:08:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:11,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:11,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:11,388 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 03:08:11,392 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 03:08:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:11,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 03:08:11,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:11,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 03:08:11,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316854825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:11,847 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:11,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-12-16 03:08:11,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516207823] [2021-12-16 03:08:11,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:11,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 03:08:11,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 03:08:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-16 03:08:11,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 86 [2021-12-16 03:08:11,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 160 flow. Second operand has 10 states, 10 states have (on average 69.5) internal successors, (695), 10 states have internal predecessors, (695), 0 states have call successors, (0), 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 03:08:11,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:11,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 86 [2021-12-16 03:08:11,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:11,950 INFO L129 PetriNetUnfolder]: 31/162 cut-off events. [2021-12-16 03:08:11,950 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-12-16 03:08:11,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 162 events. 31/162 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 492 event pairs, 3 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 259. Up to 29 conditions per place. [2021-12-16 03:08:11,953 INFO L132 encePairwiseOnDemand]: 80/86 looper letters, 20 selfloop transitions, 11 changer transitions 3/89 dead transitions. [2021-12-16 03:08:11,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 89 transitions, 285 flow [2021-12-16 03:08:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 03:08:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-16 03:08:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 502 transitions. [2021-12-16 03:08:11,959 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8338870431893688 [2021-12-16 03:08:11,959 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 502 transitions. [2021-12-16 03:08:11,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 502 transitions. [2021-12-16 03:08:11,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:11,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 502 transitions. [2021-12-16 03:08:11,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 71.71428571428571) internal successors, (502), 7 states have internal predecessors, (502), 0 states have call successors, (0), 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 03:08:11,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 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 03:08:11,964 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 86.0) internal successors, (688), 8 states have internal predecessors, (688), 0 states have call successors, (0), 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 03:08:11,964 INFO L186 Difference]: Start difference. First operand has 77 places, 70 transitions, 160 flow. Second operand 7 states and 502 transitions. [2021-12-16 03:08:11,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 89 transitions, 285 flow [2021-12-16 03:08:11,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 89 transitions, 274 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-16 03:08:11,969 INFO L242 Difference]: Finished difference. Result has 84 places, 80 transitions, 243 flow [2021-12-16 03:08:11,969 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2021-12-16 03:08:11,971 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2021-12-16 03:08:11,971 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 243 flow [2021-12-16 03:08:11,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.5) internal successors, (695), 10 states have internal predecessors, (695), 0 states have call successors, (0), 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 03:08:11,972 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:11,972 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:11,995 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 03:08:12,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:12,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:12,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:12,188 INFO L85 PathProgramCache]: Analyzing trace with hash 457420513, now seen corresponding path program 1 times [2021-12-16 03:08:12,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:12,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126753946] [2021-12-16 03:08:12,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:12,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:12,448 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 03:08:12,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:12,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126753946] [2021-12-16 03:08:12,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126753946] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:12,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838490881] [2021-12-16 03:08:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:12,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:12,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:12,453 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 03:08:12,455 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 03:08:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:12,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:12,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:12,955 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 03:08:12,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:13,459 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 03:08:13,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838490881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:13,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:13,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:13,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246518547] [2021-12-16 03:08:13,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:13,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:13,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:13,463 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:13,465 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 243 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 03:08:13,465 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:13,465 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:13,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:15,264 INFO L129 PetriNetUnfolder]: 287/862 cut-off events. [2021-12-16 03:08:15,264 INFO L130 PetriNetUnfolder]: For 791/794 co-relation queries the response was YES. [2021-12-16 03:08:15,267 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 862 events. 287/862 cut-off events. For 791/794 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5134 event pairs, 8 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 2285. Up to 170 conditions per place. [2021-12-16 03:08:15,270 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 114 selfloop transitions, 130 changer transitions 53/338 dead transitions. [2021-12-16 03:08:15,270 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 338 transitions, 2057 flow [2021-12-16 03:08:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-16 03:08:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-16 03:08:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3152 transitions. [2021-12-16 03:08:15,277 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6430028559771522 [2021-12-16 03:08:15,277 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3152 transitions. [2021-12-16 03:08:15,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3152 transitions. [2021-12-16 03:08:15,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:15,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3152 transitions. [2021-12-16 03:08:15,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.29824561403509) internal successors, (3152), 57 states have internal predecessors, (3152), 0 states have call successors, (0), 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 03:08:15,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 03:08:15,291 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 03:08:15,291 INFO L186 Difference]: Start difference. First operand has 84 places, 80 transitions, 243 flow. Second operand 57 states and 3152 transitions. [2021-12-16 03:08:15,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 338 transitions, 2057 flow [2021-12-16 03:08:15,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 338 transitions, 2057 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-16 03:08:15,300 INFO L242 Difference]: Finished difference. Result has 171 places, 215 transitions, 1482 flow [2021-12-16 03:08:15,300 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1482, PETRI_PLACES=171, PETRI_TRANSITIONS=215} [2021-12-16 03:08:15,301 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 95 predicate places. [2021-12-16 03:08:15,301 INFO L470 AbstractCegarLoop]: Abstraction has has 171 places, 215 transitions, 1482 flow [2021-12-16 03:08:15,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 03:08:15,302 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:15,302 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:15,338 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 03:08:15,538 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,SelfDestructingSolverStorable3 [2021-12-16 03:08:15,538 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:15,539 INFO L85 PathProgramCache]: Analyzing trace with hash -9261233, now seen corresponding path program 2 times [2021-12-16 03:08:15,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:15,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499843706] [2021-12-16 03:08:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:15,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:15,753 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 03:08:15,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499843706] [2021-12-16 03:08:15,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499843706] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:15,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445674271] [2021-12-16 03:08:15,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:08:15,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:15,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:15,755 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 03:08:15,755 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 03:08:15,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:08:15,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:15,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:16,189 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 03:08:16,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:16,653 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 03:08:16,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445674271] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:16,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:16,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:16,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283184147] [2021-12-16 03:08:16,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:16,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:16,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:16,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:16,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:16,655 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:16,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 215 transitions, 1482 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 03:08:16,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:16,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:16,656 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:18,440 INFO L129 PetriNetUnfolder]: 371/1162 cut-off events. [2021-12-16 03:08:18,440 INFO L130 PetriNetUnfolder]: For 3649/3652 co-relation queries the response was YES. [2021-12-16 03:08:18,446 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 1162 events. 371/1162 cut-off events. For 3649/3652 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7706 event pairs, 25 based on Foata normal form. 2/1154 useless extension candidates. Maximal degree in co-relation 4484. Up to 354 conditions per place. [2021-12-16 03:08:18,452 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 158 selfloop transitions, 197 changer transitions 34/430 dead transitions. [2021-12-16 03:08:18,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 430 transitions, 3976 flow [2021-12-16 03:08:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-16 03:08:18,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-12-16 03:08:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3027 transitions. [2021-12-16 03:08:18,458 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6399577167019027 [2021-12-16 03:08:18,458 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3027 transitions. [2021-12-16 03:08:18,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3027 transitions. [2021-12-16 03:08:18,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:18,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3027 transitions. [2021-12-16 03:08:18,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 55.03636363636364) internal successors, (3027), 55 states have internal predecessors, (3027), 0 states have call successors, (0), 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 03:08:18,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 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 03:08:18,471 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 86.0) internal successors, (4816), 56 states have internal predecessors, (4816), 0 states have call successors, (0), 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 03:08:18,471 INFO L186 Difference]: Start difference. First operand has 171 places, 215 transitions, 1482 flow. Second operand 55 states and 3027 transitions. [2021-12-16 03:08:18,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 430 transitions, 3976 flow [2021-12-16 03:08:18,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 430 transitions, 3598 flow, removed 189 selfloop flow, removed 14 redundant places. [2021-12-16 03:08:18,496 INFO L242 Difference]: Finished difference. Result has 223 places, 330 transitions, 3015 flow [2021-12-16 03:08:18,497 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=3015, PETRI_PLACES=223, PETRI_TRANSITIONS=330} [2021-12-16 03:08:18,497 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 147 predicate places. [2021-12-16 03:08:18,497 INFO L470 AbstractCegarLoop]: Abstraction has has 223 places, 330 transitions, 3015 flow [2021-12-16 03:08:18,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 03:08:18,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:18,498 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:18,532 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 03:08:18,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:18,717 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:18,717 INFO L85 PathProgramCache]: Analyzing trace with hash -792817897, now seen corresponding path program 3 times [2021-12-16 03:08:18,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:18,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921910972] [2021-12-16 03:08:18,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:18,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:18,893 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 03:08:18,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921910972] [2021-12-16 03:08:18,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921910972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106842562] [2021-12-16 03:08:18,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:08:18,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:18,896 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 03:08:18,919 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 03:08:18,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-16 03:08:18,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:18,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:19,341 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 03:08:19,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:19,819 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 03:08:19,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106842562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:19,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:19,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:19,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544842168] [2021-12-16 03:08:19,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:19,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:19,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:19,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:19,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:19,821 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:19,822 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 330 transitions, 3015 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 03:08:19,822 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:19,822 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:19,822 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:22,561 INFO L129 PetriNetUnfolder]: 424/1332 cut-off events. [2021-12-16 03:08:22,561 INFO L130 PetriNetUnfolder]: For 5970/5979 co-relation queries the response was YES. [2021-12-16 03:08:22,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6129 conditions, 1332 events. 424/1332 cut-off events. For 5970/5979 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9225 event pairs, 15 based on Foata normal form. 2/1330 useless extension candidates. Maximal degree in co-relation 6071. Up to 259 conditions per place. [2021-12-16 03:08:22,578 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 140 selfloop transitions, 307 changer transitions 38/526 dead transitions. [2021-12-16 03:08:22,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 526 transitions, 5797 flow [2021-12-16 03:08:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-16 03:08:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-12-16 03:08:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4176 transitions. [2021-12-16 03:08:22,583 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6389228886168911 [2021-12-16 03:08:22,584 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4176 transitions. [2021-12-16 03:08:22,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4176 transitions. [2021-12-16 03:08:22,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:22,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4176 transitions. [2021-12-16 03:08:22,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 54.94736842105263) internal successors, (4176), 76 states have internal predecessors, (4176), 0 states have call successors, (0), 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 03:08:22,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 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 03:08:22,601 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 86.0) internal successors, (6622), 77 states have internal predecessors, (6622), 0 states have call successors, (0), 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 03:08:22,601 INFO L186 Difference]: Start difference. First operand has 223 places, 330 transitions, 3015 flow. Second operand 76 states and 4176 transitions. [2021-12-16 03:08:22,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 526 transitions, 5797 flow [2021-12-16 03:08:22,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 526 transitions, 5520 flow, removed 123 selfloop flow, removed 12 redundant places. [2021-12-16 03:08:22,642 INFO L242 Difference]: Finished difference. Result has 292 places, 411 transitions, 4483 flow [2021-12-16 03:08:22,643 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=4483, PETRI_PLACES=292, PETRI_TRANSITIONS=411} [2021-12-16 03:08:22,644 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 216 predicate places. [2021-12-16 03:08:22,644 INFO L470 AbstractCegarLoop]: Abstraction has has 292 places, 411 transitions, 4483 flow [2021-12-16 03:08:22,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 03:08:22,645 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:22,645 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:22,662 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 03:08:22,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:22,845 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash 284311289, now seen corresponding path program 4 times [2021-12-16 03:08:22,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:22,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773596861] [2021-12-16 03:08:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:22,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:23,067 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 03:08:23,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773596861] [2021-12-16 03:08:23,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773596861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072509048] [2021-12-16 03:08:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:08:23,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:23,069 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 03:08:23,070 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 03:08:23,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:08:23,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:23,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:23,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:23,509 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 03:08:23,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:23,986 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 03:08:23,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072509048] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:23,986 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:23,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:23,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966492080] [2021-12-16 03:08:23,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:23,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:23,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:23,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:23,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:23,988 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:23,989 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 411 transitions, 4483 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:23,989 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:23,989 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:23,989 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:26,991 INFO L129 PetriNetUnfolder]: 599/2030 cut-off events. [2021-12-16 03:08:26,991 INFO L130 PetriNetUnfolder]: For 11567/11577 co-relation queries the response was YES. [2021-12-16 03:08:27,002 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9921 conditions, 2030 events. 599/2030 cut-off events. For 11567/11577 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 16343 event pairs, 23 based on Foata normal form. 5/2030 useless extension candidates. Maximal degree in co-relation 9853. Up to 387 conditions per place. [2021-12-16 03:08:27,012 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 254 selfloop transitions, 390 changer transitions 33/718 dead transitions. [2021-12-16 03:08:27,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 718 transitions, 9166 flow [2021-12-16 03:08:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-16 03:08:27,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-16 03:08:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4263 transitions. [2021-12-16 03:08:27,019 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6437632135306554 [2021-12-16 03:08:27,019 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4263 transitions. [2021-12-16 03:08:27,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4263 transitions. [2021-12-16 03:08:27,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:27,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4263 transitions. [2021-12-16 03:08:27,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.36363636363637) internal successors, (4263), 77 states have internal predecessors, (4263), 0 states have call successors, (0), 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 03:08:27,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 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 03:08:27,050 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 86.0) internal successors, (6708), 78 states have internal predecessors, (6708), 0 states have call successors, (0), 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 03:08:27,051 INFO L186 Difference]: Start difference. First operand has 292 places, 411 transitions, 4483 flow. Second operand 77 states and 4263 transitions. [2021-12-16 03:08:27,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 718 transitions, 9166 flow [2021-12-16 03:08:27,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 718 transitions, 8323 flow, removed 220 selfloop flow, removed 39 redundant places. [2021-12-16 03:08:27,122 INFO L242 Difference]: Finished difference. Result has 345 places, 545 transitions, 6643 flow [2021-12-16 03:08:27,122 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=3955, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=6643, PETRI_PLACES=345, PETRI_TRANSITIONS=545} [2021-12-16 03:08:27,124 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 269 predicate places. [2021-12-16 03:08:27,124 INFO L470 AbstractCegarLoop]: Abstraction has has 345 places, 545 transitions, 6643 flow [2021-12-16 03:08:27,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:27,125 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:27,125 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:27,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 03:08:27,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:27,359 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -720158959, now seen corresponding path program 5 times [2021-12-16 03:08:27,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:27,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003255754] [2021-12-16 03:08:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:27,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:27,534 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 03:08:27,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:27,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003255754] [2021-12-16 03:08:27,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003255754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:27,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694578901] [2021-12-16 03:08:27,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:08:27,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:27,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:27,540 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 03:08:27,541 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 03:08:27,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:08:27,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:27,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:27,963 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 03:08:27,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:28,468 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 03:08:28,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694578901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:28,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:28,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:28,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403721531] [2021-12-16 03:08:28,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:28,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:28,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:28,470 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:28,471 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 545 transitions, 6643 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 03:08:28,471 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:28,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:28,471 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:31,769 INFO L129 PetriNetUnfolder]: 599/1933 cut-off events. [2021-12-16 03:08:31,770 INFO L130 PetriNetUnfolder]: For 16372/16379 co-relation queries the response was YES. [2021-12-16 03:08:31,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10714 conditions, 1933 events. 599/1933 cut-off events. For 16372/16379 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15107 event pairs, 32 based on Foata normal form. 6/1933 useless extension candidates. Maximal degree in co-relation 10630. Up to 374 conditions per place. [2021-12-16 03:08:31,793 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 164 selfloop transitions, 406 changer transitions 48/659 dead transitions. [2021-12-16 03:08:31,793 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 659 transitions, 9086 flow [2021-12-16 03:08:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-16 03:08:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-12-16 03:08:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 4388 transitions. [2021-12-16 03:08:31,798 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6377906976744186 [2021-12-16 03:08:31,798 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 4388 transitions. [2021-12-16 03:08:31,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 4388 transitions. [2021-12-16 03:08:31,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:31,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 4388 transitions. [2021-12-16 03:08:31,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 54.85) internal successors, (4388), 80 states have internal predecessors, (4388), 0 states have call successors, (0), 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 03:08:31,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 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 03:08:31,810 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 86.0) internal successors, (6966), 81 states have internal predecessors, (6966), 0 states have call successors, (0), 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 03:08:31,810 INFO L186 Difference]: Start difference. First operand has 345 places, 545 transitions, 6643 flow. Second operand 80 states and 4388 transitions. [2021-12-16 03:08:31,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 659 transitions, 9086 flow [2021-12-16 03:08:31,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 659 transitions, 8546 flow, removed 154 selfloop flow, removed 34 redundant places. [2021-12-16 03:08:31,947 INFO L242 Difference]: Finished difference. Result has 391 places, 537 transitions, 7007 flow [2021-12-16 03:08:31,948 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6256, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=7007, PETRI_PLACES=391, PETRI_TRANSITIONS=537} [2021-12-16 03:08:31,948 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 315 predicate places. [2021-12-16 03:08:31,949 INFO L470 AbstractCegarLoop]: Abstraction has has 391 places, 537 transitions, 7007 flow [2021-12-16 03:08:31,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 03:08:31,949 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:31,949 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:31,966 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 03:08:32,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:32,163 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:32,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:32,164 INFO L85 PathProgramCache]: Analyzing trace with hash -870442055, now seen corresponding path program 6 times [2021-12-16 03:08:32,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:32,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795124216] [2021-12-16 03:08:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:32,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:32,341 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 03:08:32,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:32,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795124216] [2021-12-16 03:08:32,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795124216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:32,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570720397] [2021-12-16 03:08:32,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 03:08:32,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:32,343 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 03:08:32,344 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 03:08:32,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-16 03:08:32,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:32,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:32,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:32,747 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 03:08:32,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:33,191 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 03:08:33,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570720397] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:33,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:33,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:33,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100971106] [2021-12-16 03:08:33,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:33,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:33,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:33,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:33,194 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:33,195 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 537 transitions, 7007 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:33,195 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:33,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:33,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:35,278 INFO L129 PetriNetUnfolder]: 768/2357 cut-off events. [2021-12-16 03:08:35,278 INFO L130 PetriNetUnfolder]: For 22235/22241 co-relation queries the response was YES. [2021-12-16 03:08:35,291 INFO L84 FinitePrefix]: Finished finitePrefix Result has 14134 conditions, 2357 events. 768/2357 cut-off events. For 22235/22241 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 19153 event pairs, 51 based on Foata normal form. 2/2351 useless extension candidates. Maximal degree in co-relation 14052. Up to 790 conditions per place. [2021-12-16 03:08:35,305 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 251 selfloop transitions, 547 changer transitions 23/862 dead transitions. [2021-12-16 03:08:35,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 862 transitions, 13171 flow [2021-12-16 03:08:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-16 03:08:35,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-16 03:08:35,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3184 transitions. [2021-12-16 03:08:35,308 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6383319967923016 [2021-12-16 03:08:35,308 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3184 transitions. [2021-12-16 03:08:35,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3184 transitions. [2021-12-16 03:08:35,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:35,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3184 transitions. [2021-12-16 03:08:35,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 54.89655172413793) internal successors, (3184), 58 states have internal predecessors, (3184), 0 states have call successors, (0), 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 03:08:35,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 03:08:35,317 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 03:08:35,317 INFO L186 Difference]: Start difference. First operand has 391 places, 537 transitions, 7007 flow. Second operand 58 states and 3184 transitions. [2021-12-16 03:08:35,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 862 transitions, 13171 flow [2021-12-16 03:08:35,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 862 transitions, 11850 flow, removed 62 selfloop flow, removed 73 redundant places. [2021-12-16 03:08:35,436 INFO L242 Difference]: Finished difference. Result has 376 places, 770 transitions, 11246 flow [2021-12-16 03:08:35,436 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=6156, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=11246, PETRI_PLACES=376, PETRI_TRANSITIONS=770} [2021-12-16 03:08:35,437 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 300 predicate places. [2021-12-16 03:08:35,437 INFO L470 AbstractCegarLoop]: Abstraction has has 376 places, 770 transitions, 11246 flow [2021-12-16 03:08:35,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:35,437 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:35,437 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:35,455 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 03:08:35,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:35,638 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:35,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:35,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1120347653, now seen corresponding path program 7 times [2021-12-16 03:08:35,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:35,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409620463] [2021-12-16 03:08:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:35,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:35,827 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 03:08:35,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409620463] [2021-12-16 03:08:35,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409620463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757478983] [2021-12-16 03:08:35,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 03:08:35,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:35,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:35,828 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 03:08:35,830 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 03:08:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:35,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:35,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:36,230 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 03:08:36,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:36,643 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 03:08:36,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757478983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:36,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:36,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:36,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213189355] [2021-12-16 03:08:36,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:36,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:36,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:36,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:36,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:36,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 770 transitions, 11246 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:36,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:36,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:36,647 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:39,502 INFO L129 PetriNetUnfolder]: 854/2681 cut-off events. [2021-12-16 03:08:39,502 INFO L130 PetriNetUnfolder]: For 32245/32251 co-relation queries the response was YES. [2021-12-16 03:08:39,517 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16902 conditions, 2681 events. 854/2681 cut-off events. For 32245/32251 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22814 event pairs, 52 based on Foata normal form. 2/2676 useless extension candidates. Maximal degree in co-relation 16813. Up to 785 conditions per place. [2021-12-16 03:08:39,531 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 261 selfloop transitions, 653 changer transitions 41/996 dead transitions. [2021-12-16 03:08:39,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 996 transitions, 16389 flow [2021-12-16 03:08:39,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-16 03:08:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-12-16 03:08:39,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3647 transitions. [2021-12-16 03:08:39,534 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6425299506694856 [2021-12-16 03:08:39,534 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3647 transitions. [2021-12-16 03:08:39,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3647 transitions. [2021-12-16 03:08:39,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:39,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3647 transitions. [2021-12-16 03:08:39,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 55.25757575757576) internal successors, (3647), 66 states have internal predecessors, (3647), 0 states have call successors, (0), 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 03:08:39,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 86.0) internal successors, (5762), 67 states have internal predecessors, (5762), 0 states have call successors, (0), 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 03:08:39,543 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 86.0) internal successors, (5762), 67 states have internal predecessors, (5762), 0 states have call successors, (0), 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 03:08:39,543 INFO L186 Difference]: Start difference. First operand has 376 places, 770 transitions, 11246 flow. Second operand 66 states and 3647 transitions. [2021-12-16 03:08:39,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 996 transitions, 16389 flow [2021-12-16 03:08:39,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 996 transitions, 15684 flow, removed 229 selfloop flow, removed 27 redundant places. [2021-12-16 03:08:39,755 INFO L242 Difference]: Finished difference. Result has 430 places, 871 transitions, 14249 flow [2021-12-16 03:08:39,756 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=10669, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=559, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=14249, PETRI_PLACES=430, PETRI_TRANSITIONS=871} [2021-12-16 03:08:39,756 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 354 predicate places. [2021-12-16 03:08:39,757 INFO L470 AbstractCegarLoop]: Abstraction has has 430 places, 871 transitions, 14249 flow [2021-12-16 03:08:39,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:39,757 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:39,757 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:39,799 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 03:08:39,971 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,SelfDestructingSolverStorable9 [2021-12-16 03:08:39,972 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:39,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1699932231, now seen corresponding path program 8 times [2021-12-16 03:08:39,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:39,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033394048] [2021-12-16 03:08:39,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:39,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:40,194 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 03:08:40,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:40,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033394048] [2021-12-16 03:08:40,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033394048] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:40,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496412531] [2021-12-16 03:08:40,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:08:40,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:40,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:40,196 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 03:08:40,199 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 03:08:40,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:08:40,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:40,612 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 03:08:40,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:41,058 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 03:08:41,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496412531] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:41,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:41,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:41,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206524588] [2021-12-16 03:08:41,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:41,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:41,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:41,062 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:41,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 871 transitions, 14249 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:41,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:41,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:41,064 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:43,314 INFO L129 PetriNetUnfolder]: 826/2525 cut-off events. [2021-12-16 03:08:43,314 INFO L130 PetriNetUnfolder]: For 39703/39717 co-relation queries the response was YES. [2021-12-16 03:08:43,333 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17477 conditions, 2525 events. 826/2525 cut-off events. For 39703/39717 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20766 event pairs, 58 based on Foata normal form. 5/2523 useless extension candidates. Maximal degree in co-relation 17379. Up to 743 conditions per place. [2021-12-16 03:08:43,363 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 308 selfloop transitions, 587 changer transitions 25/961 dead transitions. [2021-12-16 03:08:43,363 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 961 transitions, 17258 flow [2021-12-16 03:08:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-16 03:08:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-12-16 03:08:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3196 transitions. [2021-12-16 03:08:43,365 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.640737770649559 [2021-12-16 03:08:43,365 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3196 transitions. [2021-12-16 03:08:43,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3196 transitions. [2021-12-16 03:08:43,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:43,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3196 transitions. [2021-12-16 03:08:43,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 55.10344827586207) internal successors, (3196), 58 states have internal predecessors, (3196), 0 states have call successors, (0), 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 03:08:43,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 03:08:43,373 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 86.0) internal successors, (5074), 59 states have internal predecessors, (5074), 0 states have call successors, (0), 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 03:08:43,374 INFO L186 Difference]: Start difference. First operand has 430 places, 871 transitions, 14249 flow. Second operand 58 states and 3196 transitions. [2021-12-16 03:08:43,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 961 transitions, 17258 flow [2021-12-16 03:08:43,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 961 transitions, 16485 flow, removed 156 selfloop flow, removed 40 redundant places. [2021-12-16 03:08:43,705 INFO L242 Difference]: Finished difference. Result has 450 places, 879 transitions, 15005 flow [2021-12-16 03:08:43,706 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=13553, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=577, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=15005, PETRI_PLACES=450, PETRI_TRANSITIONS=879} [2021-12-16 03:08:43,706 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 374 predicate places. [2021-12-16 03:08:43,707 INFO L470 AbstractCegarLoop]: Abstraction has has 450 places, 879 transitions, 15005 flow [2021-12-16 03:08:43,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:43,707 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:43,707 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:43,724 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 03:08:43,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:43,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash -306787371, now seen corresponding path program 9 times [2021-12-16 03:08:43,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:43,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857451566] [2021-12-16 03:08:43,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:43,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:44,104 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 03:08:44,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:44,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857451566] [2021-12-16 03:08:44,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857451566] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:44,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693816612] [2021-12-16 03:08:44,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:08:44,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:44,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:44,107 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 03:08:44,123 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 03:08:44,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 03:08:44,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:44,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:44,504 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 03:08:44,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:44,890 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 03:08:44,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693816612] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:44,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:44,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:44,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293744706] [2021-12-16 03:08:44,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:44,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:44,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:44,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:44,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:44,893 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:44,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 879 transitions, 15005 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 03:08:44,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:44,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:44,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:46,295 INFO L129 PetriNetUnfolder]: 859/2598 cut-off events. [2021-12-16 03:08:46,295 INFO L130 PetriNetUnfolder]: For 41933/41939 co-relation queries the response was YES. [2021-12-16 03:08:46,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19038 conditions, 2598 events. 859/2598 cut-off events. For 41933/41939 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 21481 event pairs, 57 based on Foata normal form. 1/2592 useless extension candidates. Maximal degree in co-relation 18935. Up to 1110 conditions per place. [2021-12-16 03:08:46,326 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 421 selfloop transitions, 567 changer transitions 17/1046 dead transitions. [2021-12-16 03:08:46,327 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1046 transitions, 19704 flow [2021-12-16 03:08:46,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 03:08:46,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-12-16 03:08:46,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1729 transitions. [2021-12-16 03:08:46,329 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6485371342835708 [2021-12-16 03:08:46,329 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1729 transitions. [2021-12-16 03:08:46,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1729 transitions. [2021-12-16 03:08:46,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:46,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1729 transitions. [2021-12-16 03:08:46,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 55.774193548387096) internal successors, (1729), 31 states have internal predecessors, (1729), 0 states have call successors, (0), 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 03:08:46,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 86.0) internal successors, (2752), 32 states have internal predecessors, (2752), 0 states have call successors, (0), 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 03:08:46,333 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 86.0) internal successors, (2752), 32 states have internal predecessors, (2752), 0 states have call successors, (0), 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 03:08:46,333 INFO L186 Difference]: Start difference. First operand has 450 places, 879 transitions, 15005 flow. Second operand 31 states and 1729 transitions. [2021-12-16 03:08:46,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1046 transitions, 19704 flow [2021-12-16 03:08:46,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1046 transitions, 19140 flow, removed 50 selfloop flow, removed 39 redundant places. [2021-12-16 03:08:46,609 INFO L242 Difference]: Finished difference. Result has 449 places, 960 transitions, 18260 flow [2021-12-16 03:08:46,611 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=14520, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=879, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18260, PETRI_PLACES=449, PETRI_TRANSITIONS=960} [2021-12-16 03:08:46,611 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 373 predicate places. [2021-12-16 03:08:46,611 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 960 transitions, 18260 flow [2021-12-16 03:08:46,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 03:08:46,612 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:46,612 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:46,632 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 03:08:46,823 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,SelfDestructingSolverStorable11 [2021-12-16 03:08:46,823 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1921340575, now seen corresponding path program 10 times [2021-12-16 03:08:46,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:46,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30705215] [2021-12-16 03:08:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:46,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:46,995 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 03:08:46,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:46,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30705215] [2021-12-16 03:08:46,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30705215] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:46,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762565831] [2021-12-16 03:08:46,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 03:08:46,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:46,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:46,997 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 03:08:46,998 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 03:08:47,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 03:08:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:47,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:47,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:47,404 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 03:08:47,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:47,891 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 03:08:47,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762565831] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:47,892 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:47,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:47,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698520878] [2021-12-16 03:08:47,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:47,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:47,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:47,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:47,894 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:47,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 960 transitions, 18260 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:47,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:47,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:47,894 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:49,627 INFO L129 PetriNetUnfolder]: 880/2656 cut-off events. [2021-12-16 03:08:49,627 INFO L130 PetriNetUnfolder]: For 48450/48459 co-relation queries the response was YES. [2021-12-16 03:08:49,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20838 conditions, 2656 events. 880/2656 cut-off events. For 48450/48459 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 22052 event pairs, 59 based on Foata normal form. 1/2647 useless extension candidates. Maximal degree in co-relation 20730. Up to 1121 conditions per place. [2021-12-16 03:08:49,738 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 422 selfloop transitions, 588 changer transitions 14/1065 dead transitions. [2021-12-16 03:08:49,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 1065 transitions, 22003 flow [2021-12-16 03:08:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-16 03:08:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-12-16 03:08:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2211 transitions. [2021-12-16 03:08:49,740 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6427325581395349 [2021-12-16 03:08:49,741 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2211 transitions. [2021-12-16 03:08:49,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2211 transitions. [2021-12-16 03:08:49,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:49,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2211 transitions. [2021-12-16 03:08:49,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.275) internal successors, (2211), 40 states have internal predecessors, (2211), 0 states have call successors, (0), 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 03:08:49,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 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 03:08:49,746 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 86.0) internal successors, (3526), 41 states have internal predecessors, (3526), 0 states have call successors, (0), 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 03:08:49,746 INFO L186 Difference]: Start difference. First operand has 449 places, 960 transitions, 18260 flow. Second operand 40 states and 2211 transitions. [2021-12-16 03:08:49,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 1065 transitions, 22003 flow [2021-12-16 03:08:50,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 1065 transitions, 21825 flow, removed 43 selfloop flow, removed 11 redundant places. [2021-12-16 03:08:50,105 INFO L242 Difference]: Finished difference. Result has 484 places, 1000 transitions, 20318 flow [2021-12-16 03:08:50,106 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=18104, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=960, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=553, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20318, PETRI_PLACES=484, PETRI_TRANSITIONS=1000} [2021-12-16 03:08:50,106 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 408 predicate places. [2021-12-16 03:08:50,106 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 1000 transitions, 20318 flow [2021-12-16 03:08:50,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:50,107 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:50,107 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:50,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-16 03:08:50,315 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,SelfDestructingSolverStorable12 [2021-12-16 03:08:50,316 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 84064215, now seen corresponding path program 11 times [2021-12-16 03:08:50,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:50,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9090497] [2021-12-16 03:08:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:50,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:50,505 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 03:08:50,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:50,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9090497] [2021-12-16 03:08:50,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9090497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:50,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574737570] [2021-12-16 03:08:50,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 03:08:50,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:50,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:50,507 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 03:08:50,508 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 03:08:50,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-12-16 03:08:50,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:50,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:50,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:50,950 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 03:08:50,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:51,437 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 03:08:51,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574737570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:51,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:51,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:51,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624560665] [2021-12-16 03:08:51,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:51,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:51,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:51,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:51,439 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:51,440 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1000 transitions, 20318 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:51,440 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:51,440 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:51,440 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:53,672 INFO L129 PetriNetUnfolder]: 931/2824 cut-off events. [2021-12-16 03:08:53,672 INFO L130 PetriNetUnfolder]: For 57895/57901 co-relation queries the response was YES. [2021-12-16 03:08:53,736 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23536 conditions, 2824 events. 931/2824 cut-off events. For 57895/57901 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 24016 event pairs, 56 based on Foata normal form. 1/2816 useless extension candidates. Maximal degree in co-relation 23419. Up to 1062 conditions per place. [2021-12-16 03:08:53,749 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 385 selfloop transitions, 714 changer transitions 21/1161 dead transitions. [2021-12-16 03:08:53,749 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1161 transitions, 25716 flow [2021-12-16 03:08:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 03:08:53,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-16 03:08:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2608 transitions. [2021-12-16 03:08:53,751 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6452251360712519 [2021-12-16 03:08:53,751 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2608 transitions. [2021-12-16 03:08:53,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2608 transitions. [2021-12-16 03:08:53,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:53,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2608 transitions. [2021-12-16 03:08:53,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.48936170212766) internal successors, (2608), 47 states have internal predecessors, (2608), 0 states have call successors, (0), 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 03:08:53,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 03:08:53,772 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 03:08:53,773 INFO L186 Difference]: Start difference. First operand has 484 places, 1000 transitions, 20318 flow. Second operand 47 states and 2608 transitions. [2021-12-16 03:08:53,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1161 transitions, 25716 flow [2021-12-16 03:08:54,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 1161 transitions, 25587 flow, removed 55 selfloop flow, removed 7 redundant places. [2021-12-16 03:08:54,175 INFO L242 Difference]: Finished difference. Result has 532 places, 1061 transitions, 23398 flow [2021-12-16 03:08:54,175 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=20217, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=654, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=23398, PETRI_PLACES=532, PETRI_TRANSITIONS=1061} [2021-12-16 03:08:54,176 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 456 predicate places. [2021-12-16 03:08:54,176 INFO L470 AbstractCegarLoop]: Abstraction has has 532 places, 1061 transitions, 23398 flow [2021-12-16 03:08:54,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:08:54,176 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:54,176 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:54,192 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 03:08:54,377 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,SelfDestructingSolverStorable13 [2021-12-16 03:08:54,377 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:54,378 INFO L85 PathProgramCache]: Analyzing trace with hash -641223733, now seen corresponding path program 12 times [2021-12-16 03:08:54,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:54,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299008889] [2021-12-16 03:08:54,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:54,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:54,544 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 03:08:54,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:54,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299008889] [2021-12-16 03:08:54,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299008889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:54,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971058417] [2021-12-16 03:08:54,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 03:08:54,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:54,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:54,545 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 03:08:54,546 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 03:08:54,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-12-16 03:08:54,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:08:54,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:54,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:54,986 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 03:08:54,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:55,471 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 03:08:55,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971058417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:55,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:55,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:55,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119657159] [2021-12-16 03:08:55,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:55,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:55,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:55,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:55,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:55,473 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:55,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1061 transitions, 23398 flow. Second operand has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 03:08:55,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:55,475 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:55,475 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:08:57,675 INFO L129 PetriNetUnfolder]: 968/2913 cut-off events. [2021-12-16 03:08:57,675 INFO L130 PetriNetUnfolder]: For 70264/70277 co-relation queries the response was YES. [2021-12-16 03:08:57,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26027 conditions, 2913 events. 968/2913 cut-off events. For 70264/70277 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 24936 event pairs, 64 based on Foata normal form. 4/2910 useless extension candidates. Maximal degree in co-relation 25900. Up to 1009 conditions per place. [2021-12-16 03:08:57,717 INFO L132 encePairwiseOnDemand]: 70/86 looper letters, 481 selfloop transitions, 649 changer transitions 24/1195 dead transitions. [2021-12-16 03:08:57,717 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1195 transitions, 28196 flow [2021-12-16 03:08:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 03:08:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-16 03:08:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2593 transitions. [2021-12-16 03:08:57,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415141019297378 [2021-12-16 03:08:57,720 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2593 transitions. [2021-12-16 03:08:57,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2593 transitions. [2021-12-16 03:08:57,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:08:57,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2593 transitions. [2021-12-16 03:08:57,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.170212765957444) internal successors, (2593), 47 states have internal predecessors, (2593), 0 states have call successors, (0), 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 03:08:57,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 03:08:57,726 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 03:08:57,726 INFO L186 Difference]: Start difference. First operand has 532 places, 1061 transitions, 23398 flow. Second operand 47 states and 2593 transitions. [2021-12-16 03:08:57,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1195 transitions, 28196 flow [2021-12-16 03:08:58,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 1195 transitions, 27306 flow, removed 102 selfloop flow, removed 29 redundant places. [2021-12-16 03:08:58,343 INFO L242 Difference]: Finished difference. Result has 555 places, 1095 transitions, 24653 flow [2021-12-16 03:08:58,345 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=22524, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=24653, PETRI_PLACES=555, PETRI_TRANSITIONS=1095} [2021-12-16 03:08:58,345 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 479 predicate places. [2021-12-16 03:08:58,345 INFO L470 AbstractCegarLoop]: Abstraction has has 555 places, 1095 transitions, 24653 flow [2021-12-16 03:08:58,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.878787878787875) internal successors, (1745), 33 states have internal predecessors, (1745), 0 states have call successors, (0), 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 03:08:58,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:08:58,346 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:08:58,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-16 03:08:58,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-16 03:08:58,563 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:08:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:08:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash 453043923, now seen corresponding path program 13 times [2021-12-16 03:08:58,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:08:58,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954863216] [2021-12-16 03:08:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:08:58,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:08:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:58,743 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 03:08:58,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:08:58,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954863216] [2021-12-16 03:08:58,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954863216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:08:58,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492341917] [2021-12-16 03:08:58,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 03:08:58,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:08:58,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:08:58,745 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:08:58,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 03:08:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:08:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:08:58,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:08:59,207 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 03:08:59,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:08:59,680 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 03:08:59,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492341917] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:08:59,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:08:59,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:08:59,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938865536] [2021-12-16 03:08:59,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:08:59,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:08:59,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:08:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:08:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:08:59,682 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:08:59,683 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 1095 transitions, 24653 flow. Second operand has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 03:08:59,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:08:59,683 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:08:59,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:01,874 INFO L129 PetriNetUnfolder]: 969/2947 cut-off events. [2021-12-16 03:09:01,874 INFO L130 PetriNetUnfolder]: For 73593/73599 co-relation queries the response was YES. [2021-12-16 03:09:01,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26854 conditions, 2947 events. 969/2947 cut-off events. For 73593/73599 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 25442 event pairs, 53 based on Foata normal form. 1/2939 useless extension candidates. Maximal degree in co-relation 26722. Up to 1153 conditions per place. [2021-12-16 03:09:01,916 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 418 selfloop transitions, 767 changer transitions 19/1245 dead transitions. [2021-12-16 03:09:01,916 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 1245 transitions, 29921 flow [2021-12-16 03:09:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-16 03:09:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-12-16 03:09:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2593 transitions. [2021-12-16 03:09:01,918 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6415141019297378 [2021-12-16 03:09:01,918 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2593 transitions. [2021-12-16 03:09:01,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2593 transitions. [2021-12-16 03:09:01,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:01,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2593 transitions. [2021-12-16 03:09:01,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.170212765957444) internal successors, (2593), 47 states have internal predecessors, (2593), 0 states have call successors, (0), 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 03:09:01,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 03:09:01,924 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 86.0) internal successors, (4128), 48 states have internal predecessors, (4128), 0 states have call successors, (0), 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 03:09:01,924 INFO L186 Difference]: Start difference. First operand has 555 places, 1095 transitions, 24653 flow. Second operand 47 states and 2593 transitions. [2021-12-16 03:09:01,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 1245 transitions, 29921 flow [2021-12-16 03:09:02,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 1245 transitions, 29532 flow, removed 68 selfloop flow, removed 28 redundant places. [2021-12-16 03:09:02,494 INFO L242 Difference]: Finished difference. Result has 580 places, 1162 transitions, 27614 flow [2021-12-16 03:09:02,496 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=24350, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=706, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=27614, PETRI_PLACES=580, PETRI_TRANSITIONS=1162} [2021-12-16 03:09:02,496 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 504 predicate places. [2021-12-16 03:09:02,496 INFO L470 AbstractCegarLoop]: Abstraction has has 580 places, 1162 transitions, 27614 flow [2021-12-16 03:09:02,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.84848484848485) internal successors, (1744), 33 states have internal predecessors, (1744), 0 states have call successors, (0), 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 03:09:02,497 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:02,497 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:02,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 03:09:02,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:02,711 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:02,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:02,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1579985151, now seen corresponding path program 14 times [2021-12-16 03:09:02,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:02,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450242116] [2021-12-16 03:09:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:02,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:02,878 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 03:09:02,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:02,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450242116] [2021-12-16 03:09:02,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450242116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:02,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007563115] [2021-12-16 03:09:02,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 03:09:02,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:02,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:02,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:09:02,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 03:09:02,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 03:09:02,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:09:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:09:02,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:03,344 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 03:09:03,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:03,855 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 03:09:03,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007563115] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:09:03,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:09:03,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:09:03,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832757231] [2021-12-16 03:09:03,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:09:03,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:09:03,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:09:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:09:03,859 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:09:03,860 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1162 transitions, 27614 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:09:03,860 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:03,860 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:09:03,860 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:06,254 INFO L129 PetriNetUnfolder]: 982/2981 cut-off events. [2021-12-16 03:09:06,254 INFO L130 PetriNetUnfolder]: For 77846/77852 co-relation queries the response was YES. [2021-12-16 03:09:06,363 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28521 conditions, 2981 events. 982/2981 cut-off events. For 77846/77852 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25812 event pairs, 52 based on Foata normal form. 1/2974 useless extension candidates. Maximal degree in co-relation 28383. Up to 1213 conditions per place. [2021-12-16 03:09:06,380 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 497 selfloop transitions, 732 changer transitions 16/1286 dead transitions. [2021-12-16 03:09:06,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1286 transitions, 32522 flow [2021-12-16 03:09:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-16 03:09:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-12-16 03:09:06,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2482 transitions. [2021-12-16 03:09:06,382 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.641343669250646 [2021-12-16 03:09:06,382 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2482 transitions. [2021-12-16 03:09:06,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2482 transitions. [2021-12-16 03:09:06,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:06,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2482 transitions. [2021-12-16 03:09:06,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 55.15555555555556) internal successors, (2482), 45 states have internal predecessors, (2482), 0 states have call successors, (0), 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 03:09:06,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 86.0) internal successors, (3956), 46 states have internal predecessors, (3956), 0 states have call successors, (0), 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 03:09:06,388 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 86.0) internal successors, (3956), 46 states have internal predecessors, (3956), 0 states have call successors, (0), 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 03:09:06,388 INFO L186 Difference]: Start difference. First operand has 580 places, 1162 transitions, 27614 flow. Second operand 45 states and 2482 transitions. [2021-12-16 03:09:06,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1286 transitions, 32522 flow [2021-12-16 03:09:07,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1286 transitions, 31506 flow, removed 131 selfloop flow, removed 22 redundant places. [2021-12-16 03:09:07,050 INFO L242 Difference]: Finished difference. Result has 612 places, 1206 transitions, 30227 flow [2021-12-16 03:09:07,052 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=86, PETRI_DIFFERENCE_MINUEND_FLOW=26690, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=689, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=30227, PETRI_PLACES=612, PETRI_TRANSITIONS=1206} [2021-12-16 03:09:07,052 INFO L334 CegarLoopForPetriNet]: 76 programPoint places, 536 predicate places. [2021-12-16 03:09:07,052 INFO L470 AbstractCegarLoop]: Abstraction has has 612 places, 1206 transitions, 30227 flow [2021-12-16 03:09:07,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:09:07,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-16 03:09:07,053 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 03:09:07,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 03:09:07,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-16 03:09:07,267 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-16 03:09:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 03:09:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2104963723, now seen corresponding path program 15 times [2021-12-16 03:09:07,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 03:09:07,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885070390] [2021-12-16 03:09:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 03:09:07,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 03:09:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 03:09:07,455 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 03:09:07,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 03:09:07,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885070390] [2021-12-16 03:09:07,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885070390] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 03:09:07,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329697324] [2021-12-16 03:09:07,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 03:09:07,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 03:09:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 03:09:07,457 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 03:09:07,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 03:09:07,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 03:09:07,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 03:09:07,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-16 03:09:07,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 03:09:07,896 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 03:09:07,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 03:09:08,339 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 03:09:08,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329697324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 03:09:08,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 03:09:08,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 33 [2021-12-16 03:09:08,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906554226] [2021-12-16 03:09:08,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 03:09:08,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 03:09:08,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 03:09:08,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 03:09:08,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 03:09:08,341 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 86 [2021-12-16 03:09:08,342 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1206 transitions, 30227 flow. Second operand has 33 states, 33 states have (on average 52.81818181818182) internal successors, (1743), 33 states have internal predecessors, (1743), 0 states have call successors, (0), 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 03:09:08,342 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-16 03:09:08,342 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 86 [2021-12-16 03:09:08,342 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-16 03:09:11,459 INFO L129 PetriNetUnfolder]: 1011/3088 cut-off events. [2021-12-16 03:09:11,459 INFO L130 PetriNetUnfolder]: For 87981/87988 co-relation queries the response was YES. [2021-12-16 03:09:11,493 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30930 conditions, 3088 events. 1011/3088 cut-off events. For 87981/87988 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 27075 event pairs, 53 based on Foata normal form. 1/3081 useless extension candidates. Maximal degree in co-relation 30782. Up to 1123 conditions per place. [2021-12-16 03:09:11,510 INFO L132 encePairwiseOnDemand]: 71/86 looper letters, 432 selfloop transitions, 855 changer transitions 27/1355 dead transitions. [2021-12-16 03:09:11,510 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1355 transitions, 36038 flow [2021-12-16 03:09:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-12-16 03:09:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-12-16 03:09:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3150 transitions. [2021-12-16 03:09:11,512 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.642594859241126 [2021-12-16 03:09:11,513 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3150 transitions. [2021-12-16 03:09:11,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3150 transitions. [2021-12-16 03:09:11,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-16 03:09:11,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3150 transitions. [2021-12-16 03:09:11,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 55.26315789473684) internal successors, (3150), 57 states have internal predecessors, (3150), 0 states have call successors, (0), 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 03:09:11,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 03:09:11,518 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 86.0) internal successors, (4988), 58 states have internal predecessors, (4988), 0 states have call successors, (0), 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 03:09:11,518 INFO L186 Difference]: Start difference. First operand has 612 places, 1206 transitions, 30227 flow. Second operand 57 states and 3150 transitions. [2021-12-16 03:09:11,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1355 transitions, 36038 flow