./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-channel-sum.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-channel-sum.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 c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:53:09,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:53:09,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:53:09,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:53:09,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:53:09,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:53:09,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:53:09,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:53:09,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:53:09,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:53:09,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:53:09,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:53:09,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:53:09,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:53:09,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:53:09,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:53:09,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:53:09,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:53:09,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:53:09,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:53:09,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:53:09,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:53:09,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:53:09,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:53:09,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:53:09,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:53:09,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:53:09,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:53:09,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:53:09,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:53:09,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:53:09,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:53:09,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:53:09,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:53:09,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:53:09,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:53:09,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:53:09,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:53:09,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:53:09,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:53:09,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:53:09,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:53:09,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:53:09,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:53:09,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:53:09,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:53:09,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:53:09,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:53:09,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:53:09,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:53:09,386 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:53:09,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:53:09,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:53:09,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:53:09,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:53:09,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:53:09,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:53:09,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:53:09,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:53:09,388 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:53:09,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:53:09,388 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:53:09,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:53:09,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:53:09,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:53:09,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:53:09,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:53:09,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:53:09,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:53:09,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:53:09,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:53:09,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:53:09,390 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:53:09,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:53:09,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:53:09,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:53:09,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c [2021-12-17 22:53:09,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:53:09,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:53:09,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:53:09,566 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:53:09,570 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:53:09,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-12-17 22:53:09,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2faeb56a6/570c6fdb86234a70940563af58cd66d6/FLAG4c5bc55c6 [2021-12-17 22:53:09,932 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:53:09,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2021-12-17 22:53:09,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2faeb56a6/570c6fdb86234a70940563af58cd66d6/FLAG4c5bc55c6 [2021-12-17 22:53:10,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2faeb56a6/570c6fdb86234a70940563af58cd66d6 [2021-12-17 22:53:10,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:53:10,379 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:53:10,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:53:10,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:53:10,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:53:10,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@588a8a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10, skipping insertion in model container [2021-12-17 22:53:10,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:53:10,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:53:10,553 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-channel-sum.wvr.c[2947,2960] [2021-12-17 22:53:10,557 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:53:10,562 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:53:10,575 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-channel-sum.wvr.c[2947,2960] [2021-12-17 22:53:10,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:53:10,594 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:53:10,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10 WrapperNode [2021-12-17 22:53:10,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:53:10,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:53:10,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:53:10,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:53:10,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,635 INFO L137 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 151 [2021-12-17 22:53:10,635 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:53:10,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:53:10,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:53:10,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:53:10,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,671 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:53:10,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:53:10,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:53:10,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:53:10,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (1/1) ... [2021-12-17 22:53:10,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:53:10,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:10,736 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) [2021-12-17 22:53:10,769 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 [2021-12-17 22:53:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:53:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 22:53:10,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 22:53:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 22:53:10,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 22:53:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:53:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:53:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:53:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-17 22:53:10,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-17 22:53:10,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 22:53:10,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:53:10,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:53:10,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:53:10,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:53:10,799 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:53:10,894 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:53:10,895 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:53:11,110 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:53:11,146 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:53:11,147 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 22:53:11,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:53:11 BoogieIcfgContainer [2021-12-17 22:53:11,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:53:11,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:53:11,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:53:11,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:53:11,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:53:10" (1/3) ... [2021-12-17 22:53:11,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da12345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:53:11, skipping insertion in model container [2021-12-17 22:53:11,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:53:10" (2/3) ... [2021-12-17 22:53:11,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da12345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:53:11, skipping insertion in model container [2021-12-17 22:53:11,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:53:11" (3/3) ... [2021-12-17 22:53:11,154 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2021-12-17 22:53:11,158 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:53:11,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:53:11,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:53:11,158 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:53:11,193 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,194 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,195 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,195 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,195 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,195 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,195 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,195 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,196 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,197 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,197 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,197 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,197 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,197 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,198 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,199 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,199 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,199 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,199 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,199 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,199 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,200 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,200 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,200 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,200 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,201 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,202 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,203 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,204 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,205 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,206 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,206 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,206 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,206 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,206 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,207 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,208 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post2#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem1#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,210 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_~cond~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,211 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,211 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,211 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,212 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,212 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem4#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,212 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_~flag~0#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,212 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res#1.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,212 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,212 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~mem6#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,213 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post7#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,213 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~nondet3#1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:53:11,214 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-17 22:53:11,246 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:53:11,251 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 [2021-12-17 22:53:11,251 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-17 22:53:11,258 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 138 places, 142 transitions, 300 flow [2021-12-17 22:53:11,301 INFO L129 PetriNetUnfolder]: 11/140 cut-off events. [2021-12-17 22:53:11,301 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:53:11,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 140 events. 11/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2021-12-17 22:53:11,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 142 transitions, 300 flow [2021-12-17 22:53:11,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 274 flow [2021-12-17 22:53:11,346 INFO L129 PetriNetUnfolder]: 11/130 cut-off events. [2021-12-17 22:53:11,346 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-17 22:53:11,346 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:11,347 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:11,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:11,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1559977782, now seen corresponding path program 1 times [2021-12-17 22:53:11,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:11,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766599143] [2021-12-17 22:53:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:11,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:11,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:11,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766599143] [2021-12-17 22:53:11,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766599143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:53:11,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:53:11,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:53:11,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938249946] [2021-12-17 22:53:11,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:53:11,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:53:11,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:53:11,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:53:11,550 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 142 [2021-12-17 22:53:11,553 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 274 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,553 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:11,553 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 142 [2021-12-17 22:53:11,554 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:11,583 INFO L129 PetriNetUnfolder]: 11/144 cut-off events. [2021-12-17 22:53:11,584 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-12-17 22:53:11,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 144 events. 11/144 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 201 event pairs, 4 based on Foata normal form. 18/152 useless extension candidates. Maximal degree in co-relation 95. Up to 21 conditions per place. [2021-12-17 22:53:11,586 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 9 selfloop transitions, 0 changer transitions 3/124 dead transitions. [2021-12-17 22:53:11,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 124 transitions, 278 flow [2021-12-17 22:53:11,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:53:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:53:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 266 transitions. [2021-12-17 22:53:11,594 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9366197183098591 [2021-12-17 22:53:11,594 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 266 transitions. [2021-12-17 22:53:11,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 266 transitions. [2021-12-17 22:53:11,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:11,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 266 transitions. [2021-12-17 22:53:11,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 133.0) internal successors, (266), 2 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,602 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,603 INFO L186 Difference]: Start difference. First operand has 127 places, 131 transitions, 274 flow. Second operand 2 states and 266 transitions. [2021-12-17 22:53:11,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 124 transitions, 278 flow [2021-12-17 22:53:11,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-17 22:53:11,608 INFO L242 Difference]: Finished difference. Result has 124 places, 121 transitions, 246 flow [2021-12-17 22:53:11,609 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=246, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2021-12-17 22:53:11,611 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, -3 predicate places. [2021-12-17 22:53:11,612 INFO L470 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 246 flow [2021-12-17 22:53:11,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,612 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:11,612 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:11,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:53:11,613 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:11,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1317567152, now seen corresponding path program 1 times [2021-12-17 22:53:11,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:11,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31310076] [2021-12-17 22:53:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:11,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:11,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:11,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31310076] [2021-12-17 22:53:11,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31310076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:53:11,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:53:11,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:53:11,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747971446] [2021-12-17 22:53:11,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:53:11,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:53:11,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:53:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:53:11,723 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 142 [2021-12-17 22:53:11,723 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 246 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:11,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 142 [2021-12-17 22:53:11,724 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:11,811 INFO L129 PetriNetUnfolder]: 27/291 cut-off events. [2021-12-17 22:53:11,811 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-17 22:53:11,812 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 291 events. 27/291 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1037 event pairs, 4 based on Foata normal form. 1/268 useless extension candidates. Maximal degree in co-relation 359. Up to 34 conditions per place. [2021-12-17 22:53:11,813 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 29 selfloop transitions, 2 changer transitions 4/133 dead transitions. [2021-12-17 22:53:11,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 133 transitions, 343 flow [2021-12-17 22:53:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:53:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:53:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 576 transitions. [2021-12-17 22:53:11,816 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8112676056338028 [2021-12-17 22:53:11,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 576 transitions. [2021-12-17 22:53:11,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 576 transitions. [2021-12-17 22:53:11,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:11,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 576 transitions. [2021-12-17 22:53:11,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,822 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,822 INFO L186 Difference]: Start difference. First operand has 124 places, 121 transitions, 246 flow. Second operand 5 states and 576 transitions. [2021-12-17 22:53:11,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 133 transitions, 343 flow [2021-12-17 22:53:11,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 133 transitions, 343 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:53:11,825 INFO L242 Difference]: Finished difference. Result has 128 places, 122 transitions, 262 flow [2021-12-17 22:53:11,825 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2021-12-17 22:53:11,826 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2021-12-17 22:53:11,826 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 262 flow [2021-12-17 22:53:11,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,826 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:11,827 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:11,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:53:11,827 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1193186558, now seen corresponding path program 1 times [2021-12-17 22:53:11,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:11,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810509902] [2021-12-17 22:53:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:11,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:11,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:11,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810509902] [2021-12-17 22:53:11,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810509902] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:53:11,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:53:11,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:53:11,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291467705] [2021-12-17 22:53:11,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:53:11,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:53:11,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:53:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:53:11,934 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2021-12-17 22:53:11,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:11,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:11,935 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2021-12-17 22:53:11,935 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:12,027 INFO L129 PetriNetUnfolder]: 105/445 cut-off events. [2021-12-17 22:53:12,028 INFO L130 PetriNetUnfolder]: For 16/17 co-relation queries the response was YES. [2021-12-17 22:53:12,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 445 events. 105/445 cut-off events. For 16/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1678 event pairs, 46 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 659. Up to 163 conditions per place. [2021-12-17 22:53:12,032 INFO L132 encePairwiseOnDemand]: 137/142 looper letters, 27 selfloop transitions, 6 changer transitions 3/137 dead transitions. [2021-12-17 22:53:12,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 137 transitions, 367 flow [2021-12-17 22:53:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:53:12,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:53:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 489 transitions. [2021-12-17 22:53:12,038 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8609154929577465 [2021-12-17 22:53:12,038 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 489 transitions. [2021-12-17 22:53:12,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 489 transitions. [2021-12-17 22:53:12,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:12,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 489 transitions. [2021-12-17 22:53:12,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.25) internal successors, (489), 4 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,045 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,045 INFO L186 Difference]: Start difference. First operand has 128 places, 122 transitions, 262 flow. Second operand 4 states and 489 transitions. [2021-12-17 22:53:12,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 137 transitions, 367 flow [2021-12-17 22:53:12,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 137 transitions, 361 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-12-17 22:53:12,051 INFO L242 Difference]: Finished difference. Result has 128 places, 127 transitions, 293 flow [2021-12-17 22:53:12,051 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2021-12-17 22:53:12,052 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1 predicate places. [2021-12-17 22:53:12,053 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 293 flow [2021-12-17 22:53:12,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,053 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:12,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:12,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:53:12,054 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:12,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash -152225810, now seen corresponding path program 1 times [2021-12-17 22:53:12,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:12,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312184280] [2021-12-17 22:53:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:12,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:53:12,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:12,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312184280] [2021-12-17 22:53:12,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312184280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:53:12,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:53:12,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 22:53:12,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299773498] [2021-12-17 22:53:12,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:53:12,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 22:53:12,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 22:53:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 22:53:12,140 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2021-12-17 22:53:12,140 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 293 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,141 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:12,141 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2021-12-17 22:53:12,141 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:12,192 INFO L129 PetriNetUnfolder]: 30/232 cut-off events. [2021-12-17 22:53:12,192 INFO L130 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2021-12-17 22:53:12,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 232 events. 30/232 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 703 event pairs, 13 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 331. Up to 56 conditions per place. [2021-12-17 22:53:12,194 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 18 selfloop transitions, 2 changer transitions 1/131 dead transitions. [2021-12-17 22:53:12,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 131 transitions, 339 flow [2021-12-17 22:53:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 22:53:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-17 22:53:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 384 transitions. [2021-12-17 22:53:12,196 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9014084507042254 [2021-12-17 22:53:12,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 384 transitions. [2021-12-17 22:53:12,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 384 transitions. [2021-12-17 22:53:12,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:12,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 384 transitions. [2021-12-17 22:53:12,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,198 INFO L186 Difference]: Start difference. First operand has 128 places, 127 transitions, 293 flow. Second operand 3 states and 384 transitions. [2021-12-17 22:53:12,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 131 transitions, 339 flow [2021-12-17 22:53:12,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 131 transitions, 337 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-12-17 22:53:12,203 INFO L242 Difference]: Finished difference. Result has 131 places, 126 transitions, 293 flow [2021-12-17 22:53:12,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=293, PETRI_PLACES=131, PETRI_TRANSITIONS=126} [2021-12-17 22:53:12,204 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 4 predicate places. [2021-12-17 22:53:12,205 INFO L470 AbstractCegarLoop]: Abstraction has has 131 places, 126 transitions, 293 flow [2021-12-17 22:53:12,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,205 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:12,205 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:12,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:53:12,206 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:12,207 INFO L85 PathProgramCache]: Analyzing trace with hash -873764727, now seen corresponding path program 1 times [2021-12-17 22:53:12,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:12,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561581111] [2021-12-17 22:53:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:12,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:12,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:12,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561581111] [2021-12-17 22:53:12,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561581111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:53:12,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:53:12,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 22:53:12,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637261737] [2021-12-17 22:53:12,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:53:12,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 22:53:12,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 22:53:12,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 22:53:12,365 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 142 [2021-12-17 22:53:12,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 126 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:12,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 142 [2021-12-17 22:53:12,366 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:12,457 INFO L129 PetriNetUnfolder]: 130/564 cut-off events. [2021-12-17 22:53:12,458 INFO L130 PetriNetUnfolder]: For 65/65 co-relation queries the response was YES. [2021-12-17 22:53:12,459 INFO L84 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 564 events. 130/564 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2594 event pairs, 64 based on Foata normal form. 5/537 useless extension candidates. Maximal degree in co-relation 899. Up to 190 conditions per place. [2021-12-17 22:53:12,463 INFO L132 encePairwiseOnDemand]: 138/142 looper letters, 22 selfloop transitions, 2 changer transitions 16/142 dead transitions. [2021-12-17 22:53:12,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 142 transitions, 412 flow [2021-12-17 22:53:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 22:53:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-12-17 22:53:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2021-12-17 22:53:12,465 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8535211267605634 [2021-12-17 22:53:12,465 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2021-12-17 22:53:12,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2021-12-17 22:53:12,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:12,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2021-12-17 22:53:12,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,469 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 142.0) internal successors, (852), 6 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,469 INFO L186 Difference]: Start difference. First operand has 131 places, 126 transitions, 293 flow. Second operand 5 states and 606 transitions. [2021-12-17 22:53:12,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 142 transitions, 412 flow [2021-12-17 22:53:12,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 142 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-17 22:53:12,472 INFO L242 Difference]: Finished difference. Result has 135 places, 124 transitions, 286 flow [2021-12-17 22:53:12,472 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=286, PETRI_PLACES=135, PETRI_TRANSITIONS=124} [2021-12-17 22:53:12,474 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 8 predicate places. [2021-12-17 22:53:12,474 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 124 transitions, 286 flow [2021-12-17 22:53:12,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,475 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:12,475 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:12,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 22:53:12,475 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:12,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1127355725, now seen corresponding path program 2 times [2021-12-17 22:53:12,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:12,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677861944] [2021-12-17 22:53:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:12,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:12,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:12,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677861944] [2021-12-17 22:53:12,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677861944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:53:12,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:53:12,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 22:53:12,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046421542] [2021-12-17 22:53:12,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:53:12,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 22:53:12,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 22:53:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 22:53:12,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 142 [2021-12-17 22:53:12,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 124 transitions, 286 flow. Second operand has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:12,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 142 [2021-12-17 22:53:12,594 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:12,886 INFO L129 PetriNetUnfolder]: 169/645 cut-off events. [2021-12-17 22:53:12,886 INFO L130 PetriNetUnfolder]: For 76/76 co-relation queries the response was YES. [2021-12-17 22:53:12,888 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 645 events. 169/645 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2867 event pairs, 40 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 1083. Up to 117 conditions per place. [2021-12-17 22:53:12,889 INFO L132 encePairwiseOnDemand]: 130/142 looper letters, 47 selfloop transitions, 6 changer transitions 41/180 dead transitions. [2021-12-17 22:53:12,890 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 180 transitions, 611 flow [2021-12-17 22:53:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 22:53:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 22:53:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1257 transitions. [2021-12-17 22:53:12,892 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7376760563380281 [2021-12-17 22:53:12,892 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1257 transitions. [2021-12-17 22:53:12,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1257 transitions. [2021-12-17 22:53:12,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:12,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1257 transitions. [2021-12-17 22:53:12,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.75) internal successors, (1257), 12 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,897 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 142.0) internal successors, (1846), 13 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,897 INFO L186 Difference]: Start difference. First operand has 135 places, 124 transitions, 286 flow. Second operand 12 states and 1257 transitions. [2021-12-17 22:53:12,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 180 transitions, 611 flow [2021-12-17 22:53:12,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 180 transitions, 601 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-12-17 22:53:12,900 INFO L242 Difference]: Finished difference. Result has 145 places, 125 transitions, 312 flow [2021-12-17 22:53:12,901 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=312, PETRI_PLACES=145, PETRI_TRANSITIONS=125} [2021-12-17 22:53:12,901 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 18 predicate places. [2021-12-17 22:53:12,901 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 125 transitions, 312 flow [2021-12-17 22:53:12,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.0) internal successors, (1000), 10 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:12,902 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:12,902 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:12,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 22:53:12,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1481163317, now seen corresponding path program 1 times [2021-12-17 22:53:12,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:12,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816235901] [2021-12-17 22:53:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:12,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:53:13,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:13,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816235901] [2021-12-17 22:53:13,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816235901] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:13,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932878850] [2021-12-17 22:53:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:13,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:13,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:13,072 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) [2021-12-17 22:53:13,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 22:53:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:13,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-17 22:53:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:13,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:53:13,327 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-17 22:53:13,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-17 22:53:13,805 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-17 22:53:13,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-17 22:53:13,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-17 22:53:14,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:53:14,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-17 22:53:14,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-12-17 22:53:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:14,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:15,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:53:15,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 70 [2021-12-17 22:53:15,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:53:15,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 480 treesize of output 448 [2021-12-17 22:53:15,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:53:15,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 432 treesize of output 412 [2021-12-17 22:53:15,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:53:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 396 treesize of output 340 [2021-12-17 22:53:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:19,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932878850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:19,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:19,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 28, 28] total 55 [2021-12-17 22:53:19,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762874633] [2021-12-17 22:53:19,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:19,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-17 22:53:19,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-17 22:53:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2388, Unknown=41, NotChecked=0, Total=2970 [2021-12-17 22:53:19,480 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2021-12-17 22:53:19,483 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 125 transitions, 312 flow. Second operand has 55 states, 55 states have (on average 56.163636363636364) internal successors, (3089), 55 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:19,483 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:19,483 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2021-12-17 22:53:19,483 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:22,789 INFO L129 PetriNetUnfolder]: 850/1934 cut-off events. [2021-12-17 22:53:22,790 INFO L130 PetriNetUnfolder]: For 381/381 co-relation queries the response was YES. [2021-12-17 22:53:22,794 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4001 conditions, 1934 events. 850/1934 cut-off events. For 381/381 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 11364 event pairs, 54 based on Foata normal form. 11/1888 useless extension candidates. Maximal degree in co-relation 3987. Up to 327 conditions per place. [2021-12-17 22:53:22,800 INFO L132 encePairwiseOnDemand]: 106/142 looper letters, 207 selfloop transitions, 89 changer transitions 8/352 dead transitions. [2021-12-17 22:53:22,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 352 transitions, 1531 flow [2021-12-17 22:53:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-17 22:53:22,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-12-17 22:53:22,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3224 transitions. [2021-12-17 22:53:22,807 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.41280409731113954 [2021-12-17 22:53:22,807 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3224 transitions. [2021-12-17 22:53:22,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3224 transitions. [2021-12-17 22:53:22,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:22,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3224 transitions. [2021-12-17 22:53:22,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 58.61818181818182) internal successors, (3224), 55 states have internal predecessors, (3224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:22,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 142.0) internal successors, (7952), 56 states have internal predecessors, (7952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:22,824 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 142.0) internal successors, (7952), 56 states have internal predecessors, (7952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:22,824 INFO L186 Difference]: Start difference. First operand has 145 places, 125 transitions, 312 flow. Second operand 55 states and 3224 transitions. [2021-12-17 22:53:22,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 352 transitions, 1531 flow [2021-12-17 22:53:22,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 352 transitions, 1446 flow, removed 38 selfloop flow, removed 7 redundant places. [2021-12-17 22:53:22,833 INFO L242 Difference]: Finished difference. Result has 221 places, 212 transitions, 979 flow [2021-12-17 22:53:22,833 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=979, PETRI_PLACES=221, PETRI_TRANSITIONS=212} [2021-12-17 22:53:22,834 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 94 predicate places. [2021-12-17 22:53:22,834 INFO L470 AbstractCegarLoop]: Abstraction has has 221 places, 212 transitions, 979 flow [2021-12-17 22:53:22,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 56.163636363636364) internal successors, (3089), 55 states have internal predecessors, (3089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:22,835 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:22,835 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:22,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 22:53:23,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:23,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash -622100481, now seen corresponding path program 2 times [2021-12-17 22:53:23,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:23,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126673467] [2021-12-17 22:53:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:23,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:53:23,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:23,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126673467] [2021-12-17 22:53:23,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126673467] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:23,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657834338] [2021-12-17 22:53:23,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:53:23,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:23,187 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) [2021-12-17 22:53:23,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 22:53:23,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:53:23,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:23,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 22:53:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:53:23,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 22:53:24,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657834338] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:24,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:24,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 15] total 29 [2021-12-17 22:53:24,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399554722] [2021-12-17 22:53:24,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:24,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-17 22:53:24,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-17 22:53:24,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-12-17 22:53:24,100 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 142 [2021-12-17 22:53:24,102 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 212 transitions, 979 flow. Second operand has 29 states, 29 states have (on average 96.72413793103448) internal successors, (2805), 29 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:24,102 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:24,102 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 142 [2021-12-17 22:53:24,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:25,640 INFO L129 PetriNetUnfolder]: 663/1920 cut-off events. [2021-12-17 22:53:25,640 INFO L130 PetriNetUnfolder]: For 6298/6305 co-relation queries the response was YES. [2021-12-17 22:53:25,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6118 conditions, 1920 events. 663/1920 cut-off events. For 6298/6305 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 10987 event pairs, 169 based on Foata normal form. 9/1854 useless extension candidates. Maximal degree in co-relation 6073. Up to 503 conditions per place. [2021-12-17 22:53:25,654 INFO L132 encePairwiseOnDemand]: 118/142 looper letters, 100 selfloop transitions, 69 changer transitions 144/401 dead transitions. [2021-12-17 22:53:25,654 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 401 transitions, 2727 flow [2021-12-17 22:53:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 22:53:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 22:53:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3830 transitions. [2021-12-17 22:53:25,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6915854098952691 [2021-12-17 22:53:25,661 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3830 transitions. [2021-12-17 22:53:25,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3830 transitions. [2021-12-17 22:53:25,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:25,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3830 transitions. [2021-12-17 22:53:25,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 98.2051282051282) internal successors, (3830), 39 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:25,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 142.0) internal successors, (5680), 40 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:25,676 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 142.0) internal successors, (5680), 40 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:25,676 INFO L186 Difference]: Start difference. First operand has 221 places, 212 transitions, 979 flow. Second operand 39 states and 3830 transitions. [2021-12-17 22:53:25,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 401 transitions, 2727 flow [2021-12-17 22:53:25,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 401 transitions, 2570 flow, removed 58 selfloop flow, removed 17 redundant places. [2021-12-17 22:53:25,697 INFO L242 Difference]: Finished difference. Result has 259 places, 212 transitions, 1128 flow [2021-12-17 22:53:25,697 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1128, PETRI_PLACES=259, PETRI_TRANSITIONS=212} [2021-12-17 22:53:25,699 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 132 predicate places. [2021-12-17 22:53:25,699 INFO L470 AbstractCegarLoop]: Abstraction has has 259 places, 212 transitions, 1128 flow [2021-12-17 22:53:25,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 96.72413793103448) internal successors, (2805), 29 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:25,700 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:25,701 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:25,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 22:53:25,917 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,SelfDestructingSolverStorable7 [2021-12-17 22:53:25,918 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash 283922168, now seen corresponding path program 3 times [2021-12-17 22:53:25,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:25,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948595362] [2021-12-17 22:53:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:25,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 22:53:25,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:25,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948595362] [2021-12-17 22:53:25,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948595362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:53:25,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:53:25,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 22:53:25,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616407393] [2021-12-17 22:53:26,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:53:26,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 22:53:26,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:26,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 22:53:26,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 22:53:26,001 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 142 [2021-12-17 22:53:26,002 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 212 transitions, 1128 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:26,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:26,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 142 [2021-12-17 22:53:26,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:26,164 INFO L129 PetriNetUnfolder]: 208/1090 cut-off events. [2021-12-17 22:53:26,164 INFO L130 PetriNetUnfolder]: For 11603/11758 co-relation queries the response was YES. [2021-12-17 22:53:26,170 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3905 conditions, 1090 events. 208/1090 cut-off events. For 11603/11758 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6216 event pairs, 84 based on Foata normal form. 94/1137 useless extension candidates. Maximal degree in co-relation 3843. Up to 193 conditions per place. [2021-12-17 22:53:26,173 INFO L132 encePairwiseOnDemand]: 138/142 looper letters, 68 selfloop transitions, 4 changer transitions 0/201 dead transitions. [2021-12-17 22:53:26,173 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 201 transitions, 1190 flow [2021-12-17 22:53:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 22:53:26,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-12-17 22:53:26,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2021-12-17 22:53:26,175 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8855633802816901 [2021-12-17 22:53:26,175 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2021-12-17 22:53:26,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2021-12-17 22:53:26,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:26,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2021-12-17 22:53:26,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:26,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:26,178 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:26,178 INFO L186 Difference]: Start difference. First operand has 259 places, 212 transitions, 1128 flow. Second operand 4 states and 503 transitions. [2021-12-17 22:53:26,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 201 transitions, 1190 flow [2021-12-17 22:53:26,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 201 transitions, 1093 flow, removed 39 selfloop flow, removed 35 redundant places. [2021-12-17 22:53:26,188 INFO L242 Difference]: Finished difference. Result has 182 places, 198 transitions, 946 flow [2021-12-17 22:53:26,188 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=946, PETRI_PLACES=182, PETRI_TRANSITIONS=198} [2021-12-17 22:53:26,189 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 55 predicate places. [2021-12-17 22:53:26,189 INFO L470 AbstractCegarLoop]: Abstraction has has 182 places, 198 transitions, 946 flow [2021-12-17 22:53:26,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:26,189 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:26,190 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:26,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 22:53:26,190 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:26,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1921439681, now seen corresponding path program 1 times [2021-12-17 22:53:26,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:26,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240542399] [2021-12-17 22:53:26,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:26,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:26,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240542399] [2021-12-17 22:53:26,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240542399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461090287] [2021-12-17 22:53:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:26,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:26,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:26,509 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) [2021-12-17 22:53:26,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 22:53:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:26,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-17 22:53:26,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:27,934 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-17 22:53:27,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 15 [2021-12-17 22:53:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:27,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:28,932 INFO L354 Elim1Store]: treesize reduction 50, result has 51.5 percent of original size [2021-12-17 22:53:28,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 76 [2021-12-17 22:53:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:29,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461090287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:29,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:29,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 66 [2021-12-17 22:53:29,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461988003] [2021-12-17 22:53:29,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:29,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-12-17 22:53:29,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:29,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-12-17 22:53:29,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=3740, Unknown=0, NotChecked=0, Total=4290 [2021-12-17 22:53:29,909 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2021-12-17 22:53:29,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 198 transitions, 946 flow. Second operand has 66 states, 66 states have (on average 71.98484848484848) internal successors, (4751), 66 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:29,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:29,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2021-12-17 22:53:29,912 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:39,796 INFO L129 PetriNetUnfolder]: 4659/10334 cut-off events. [2021-12-17 22:53:39,797 INFO L130 PetriNetUnfolder]: For 33542/33590 co-relation queries the response was YES. [2021-12-17 22:53:39,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36217 conditions, 10334 events. 4659/10334 cut-off events. For 33542/33590 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 83946 event pairs, 76 based on Foata normal form. 12/10181 useless extension candidates. Maximal degree in co-relation 36178. Up to 1552 conditions per place. [2021-12-17 22:53:39,870 INFO L132 encePairwiseOnDemand]: 113/142 looper letters, 617 selfloop transitions, 499 changer transitions 57/1234 dead transitions. [2021-12-17 22:53:39,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1234 transitions, 9559 flow [2021-12-17 22:53:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-12-17 22:53:39,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2021-12-17 22:53:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 13022 transitions. [2021-12-17 22:53:39,881 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.5240241448692153 [2021-12-17 22:53:39,881 INFO L72 ComplementDD]: Start complementDD. Operand 175 states and 13022 transitions. [2021-12-17 22:53:39,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 13022 transitions. [2021-12-17 22:53:39,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:39,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 175 states and 13022 transitions. [2021-12-17 22:53:39,896 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 176 states, 175 states have (on average 74.41142857142857) internal successors, (13022), 175 states have internal predecessors, (13022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:39,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 176 states, 176 states have (on average 142.0) internal successors, (24992), 176 states have internal predecessors, (24992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:39,919 INFO L81 ComplementDD]: Finished complementDD. Result has 176 states, 176 states have (on average 142.0) internal successors, (24992), 176 states have internal predecessors, (24992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:39,919 INFO L186 Difference]: Start difference. First operand has 182 places, 198 transitions, 946 flow. Second operand 175 states and 13022 transitions. [2021-12-17 22:53:39,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1234 transitions, 9559 flow [2021-12-17 22:53:39,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1234 transitions, 9382 flow, removed 88 selfloop flow, removed 3 redundant places. [2021-12-17 22:53:39,951 INFO L242 Difference]: Finished difference. Result has 451 places, 663 transitions, 6280 flow [2021-12-17 22:53:39,952 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=175, PETRI_FLOW=6280, PETRI_PLACES=451, PETRI_TRANSITIONS=663} [2021-12-17 22:53:39,952 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 324 predicate places. [2021-12-17 22:53:39,952 INFO L470 AbstractCegarLoop]: Abstraction has has 451 places, 663 transitions, 6280 flow [2021-12-17 22:53:39,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 71.98484848484848) internal successors, (4751), 66 states have internal predecessors, (4751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:39,953 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:39,954 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:39,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 22:53:40,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:40,170 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1674901041, now seen corresponding path program 2 times [2021-12-17 22:53:40,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:40,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410370951] [2021-12-17 22:53:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:40,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:40,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:40,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410370951] [2021-12-17 22:53:40,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410370951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:40,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832863473] [2021-12-17 22:53:40,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 22:53:40,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:40,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:40,313 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) [2021-12-17 22:53:40,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 22:53:40,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 22:53:40,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:40,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 22:53:40,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:40,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:53:41,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832863473] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:41,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:41,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2021-12-17 22:53:41,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370870721] [2021-12-17 22:53:41,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:41,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 22:53:41,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:41,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 22:53:41,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-12-17 22:53:41,111 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 142 [2021-12-17 22:53:41,112 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 663 transitions, 6280 flow. Second operand has 21 states, 21 states have (on average 111.38095238095238) internal successors, (2339), 21 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:41,112 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:41,112 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 142 [2021-12-17 22:53:41,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:53:45,013 INFO L129 PetriNetUnfolder]: 3840/12956 cut-off events. [2021-12-17 22:53:45,013 INFO L130 PetriNetUnfolder]: For 148417/148735 co-relation queries the response was YES. [2021-12-17 22:53:45,194 INFO L84 FinitePrefix]: Finished finitePrefix Result has 58718 conditions, 12956 events. 3840/12956 cut-off events. For 148417/148735 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 131642 event pairs, 344 based on Foata normal form. 259/12687 useless extension candidates. Maximal degree in co-relation 58584. Up to 1324 conditions per place. [2021-12-17 22:53:45,307 INFO L132 encePairwiseOnDemand]: 128/142 looper letters, 603 selfloop transitions, 475 changer transitions 126/1402 dead transitions. [2021-12-17 22:53:45,310 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1402 transitions, 16411 flow [2021-12-17 22:53:45,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-17 22:53:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-12-17 22:53:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4510 transitions. [2021-12-17 22:53:45,321 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8143734200072228 [2021-12-17 22:53:45,321 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4510 transitions. [2021-12-17 22:53:45,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4510 transitions. [2021-12-17 22:53:45,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:53:45,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4510 transitions. [2021-12-17 22:53:45,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 115.64102564102564) internal successors, (4510), 39 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:45,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 142.0) internal successors, (5680), 40 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:45,350 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 142.0) internal successors, (5680), 40 states have internal predecessors, (5680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:45,350 INFO L186 Difference]: Start difference. First operand has 451 places, 663 transitions, 6280 flow. Second operand 39 states and 4510 transitions. [2021-12-17 22:53:45,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1402 transitions, 16411 flow [2021-12-17 22:53:46,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 1402 transitions, 14199 flow, removed 952 selfloop flow, removed 19 redundant places. [2021-12-17 22:53:46,180 INFO L242 Difference]: Finished difference. Result has 484 places, 953 transitions, 9280 flow [2021-12-17 22:53:46,181 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=9280, PETRI_PLACES=484, PETRI_TRANSITIONS=953} [2021-12-17 22:53:46,182 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 357 predicate places. [2021-12-17 22:53:46,182 INFO L470 AbstractCegarLoop]: Abstraction has has 484 places, 953 transitions, 9280 flow [2021-12-17 22:53:46,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 111.38095238095238) internal successors, (2339), 21 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:46,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:53:46,183 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:53:46,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-17 22:53:46,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:46,399 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:53:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:53:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 322463635, now seen corresponding path program 3 times [2021-12-17 22:53:46,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:53:46,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299351239] [2021-12-17 22:53:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:53:46,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:53:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:53:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:48,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:53:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299351239] [2021-12-17 22:53:48,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299351239] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:53:48,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306988118] [2021-12-17 22:53:48,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 22:53:48,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:53:48,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:53:48,534 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) [2021-12-17 22:53:48,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 22:53:48,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 22:53:48,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:53:48,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-17 22:53:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:53:50,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:53:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 22:53:50,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 22:53:50,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 22:53:50,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 18 [2021-12-17 22:53:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:50,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:53:51,771 INFO L354 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2021-12-17 22:53:51,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 76 [2021-12-17 22:53:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:53:53,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306988118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:53:53,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:53:53,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 34, 28] total 91 [2021-12-17 22:53:53,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508170262] [2021-12-17 22:53:53,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:53:53,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-17 22:53:53,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:53:53,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-17 22:53:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=7652, Unknown=0, NotChecked=0, Total=8190 [2021-12-17 22:53:53,469 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 142 [2021-12-17 22:53:53,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 953 transitions, 9280 flow. Second operand has 91 states, 91 states have (on average 54.582417582417584) internal successors, (4967), 91 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:53:53,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:53:53,472 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 142 [2021-12-17 22:53:53,472 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:55:25,831 INFO L129 PetriNetUnfolder]: 36291/87597 cut-off events. [2021-12-17 22:55:25,832 INFO L130 PetriNetUnfolder]: For 1264613/1265614 co-relation queries the response was YES. [2021-12-17 22:55:28,805 INFO L84 FinitePrefix]: Finished finitePrefix Result has 470631 conditions, 87597 events. 36291/87597 cut-off events. For 1264613/1265614 co-relation queries the response was YES. Maximal size of possible extension queue 2038. Compared 1074940 event pairs, 3292 based on Foata normal form. 257/84892 useless extension candidates. Maximal degree in co-relation 470485. Up to 11940 conditions per place. [2021-12-17 22:55:29,395 INFO L132 encePairwiseOnDemand]: 99/142 looper letters, 2526 selfloop transitions, 3248 changer transitions 165/6069 dead transitions. [2021-12-17 22:55:29,396 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 952 places, 6069 transitions, 82375 flow [2021-12-17 22:55:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 469 states. [2021-12-17 22:55:29,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2021-12-17 22:55:29,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 26899 transitions. [2021-12-17 22:55:29,417 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.40390101804859 [2021-12-17 22:55:29,417 INFO L72 ComplementDD]: Start complementDD. Operand 469 states and 26899 transitions. [2021-12-17 22:55:29,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 469 states and 26899 transitions. [2021-12-17 22:55:29,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:55:29,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 469 states and 26899 transitions. [2021-12-17 22:55:29,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 470 states, 469 states have (on average 57.353944562899784) internal successors, (26899), 469 states have internal predecessors, (26899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:55:29,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 470 states, 470 states have (on average 142.0) internal successors, (66740), 470 states have internal predecessors, (66740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:55:29,506 INFO L81 ComplementDD]: Finished complementDD. Result has 470 states, 470 states have (on average 142.0) internal successors, (66740), 470 states have internal predecessors, (66740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:55:29,506 INFO L186 Difference]: Start difference. First operand has 484 places, 953 transitions, 9280 flow. Second operand 469 states and 26899 transitions. [2021-12-17 22:55:29,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 952 places, 6069 transitions, 82375 flow [2021-12-17 22:55:40,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 944 places, 6069 transitions, 75899 flow, removed 2855 selfloop flow, removed 8 redundant places. [2021-12-17 22:55:40,129 INFO L242 Difference]: Finished difference. Result has 1166 places, 4125 transitions, 58345 flow [2021-12-17 22:55:40,130 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=8574, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=402, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=469, PETRI_FLOW=58345, PETRI_PLACES=1166, PETRI_TRANSITIONS=4125} [2021-12-17 22:55:40,130 INFO L334 CegarLoopForPetriNet]: 127 programPoint places, 1039 predicate places. [2021-12-17 22:55:40,130 INFO L470 AbstractCegarLoop]: Abstraction has has 1166 places, 4125 transitions, 58345 flow [2021-12-17 22:55:40,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 54.582417582417584) internal successors, (4967), 91 states have internal predecessors, (4967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:55:40,131 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:55:40,132 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:55:40,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 22:55:40,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 22:55:40,344 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-17 22:55:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:55:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1349141887, now seen corresponding path program 4 times [2021-12-17 22:55:40,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:55:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30147925] [2021-12-17 22:55:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:55:40,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:55:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:55:40,602 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 22:55:40,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:55:40,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30147925] [2021-12-17 22:55:40,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30147925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:55:40,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050057111] [2021-12-17 22:55:40,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 22:55:40,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:55:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:55:40,604 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) [2021-12-17 22:55:40,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 22:55:40,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 22:55:40,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 22:55:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-17 22:55:40,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:55:42,151 INFO L354 Elim1Store]: treesize reduction 93, result has 7.0 percent of original size [2021-12-17 22:55:42,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 21 [2021-12-17 22:55:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:55:42,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:55:43,018 INFO L354 Elim1Store]: treesize reduction 47, result has 53.0 percent of original size [2021-12-17 22:55:43,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 76 [2021-12-17 22:55:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:55:45,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050057111] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:55:45,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:55:45,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28, 28] total 62 [2021-12-17 22:55:45,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907455190] [2021-12-17 22:55:45,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:55:45,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-17 22:55:45,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:55:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-17 22:55:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=3361, Unknown=0, NotChecked=0, Total=3782 [2021-12-17 22:55:45,194 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2021-12-17 22:55:45,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1166 places, 4125 transitions, 58345 flow. Second operand has 62 states, 62 states have (on average 72.2258064516129) internal successors, (4478), 62 states have internal predecessors, (4478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:55:45,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:55:45,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2021-12-17 22:55:45,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand