./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/bench-exp1x3.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 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:59:05,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:59:05,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:59:05,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:59:05,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:59:05,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:59:05,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:59:05,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:59:05,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:59:05,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:59:05,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:59:05,837 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:59:05,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:59:05,842 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:59:05,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:59:05,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:59:05,849 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:59:05,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:59:05,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:59:05,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:59:05,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:59:05,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:59:05,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:59:05,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:59:05,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:59:05,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:59:05,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:59:05,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:59:05,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:59:05,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:59:05,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:59:05,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:59:05,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:59:05,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:59:05,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:59:05,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:59:05,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:59:05,888 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:59:05,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:59:05,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:59:05,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:59:05,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:59:05,907 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:59:05,909 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:59:05,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:59:05,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:59:05,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:59:05,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:59:05,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:59:05,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:59:05,912 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:59:05,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:59:05,913 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:59:05,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:59:05,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:59:05,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:59:05,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:59:05,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:59:05,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:59:05,914 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:59:05,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:59:05,914 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:59:05,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:59:05,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:59:05,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:59:05,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:59:05,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:59:05,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:59:05,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:59:05,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:59:05,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:59:05,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:59:05,916 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:59:05,916 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:59:05,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:59:05,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 [2021-12-28 02:59:06,194 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:59:06,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:59:06,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:59:06,222 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:59:06,224 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:59:06,225 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2021-12-28 02:59:06,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae1da0d3/4937253b64584974a8a2ef481e517411/FLAGc40dd99aa [2021-12-28 02:59:06,664 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:59:06,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2021-12-28 02:59:06,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae1da0d3/4937253b64584974a8a2ef481e517411/FLAGc40dd99aa [2021-12-28 02:59:06,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ae1da0d3/4937253b64584974a8a2ef481e517411 [2021-12-28 02:59:06,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:59:06,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:59:06,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:59:06,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:59:06,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:59:06,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b6f0170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06, skipping insertion in model container [2021-12-28 02:59:06,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:59:06,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:59:06,856 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/bench-exp1x3.wvr.c[1849,1862] [2021-12-28 02:59:06,859 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:59:06,864 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:59:06,882 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/bench-exp1x3.wvr.c[1849,1862] [2021-12-28 02:59:06,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:59:06,932 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:59:06,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06 WrapperNode [2021-12-28 02:59:06,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:59:06,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:59:06,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:59:06,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:59:06,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,963 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2021-12-28 02:59:06,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:59:06,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:59:06,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:59:06,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:59:06,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:59:06,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:59:06,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:59:06,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:59:06,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (1/1) ... [2021-12-28 02:59:06,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:59:07,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:59:07,014 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) [2021-12-28 02:59:07,026 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 [2021-12-28 02:59:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:59:07,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-28 02:59:07,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-28 02:59:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-28 02:59:07,064 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-28 02:59:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:59:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 02:59:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 02:59:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:59:07,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:59:07,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 02:59:07,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 02:59:07,066 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-28 02:59:07,140 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:59:07,141 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:59:07,313 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:59:07,325 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:59:07,325 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 02:59:07,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:59:07 BoogieIcfgContainer [2021-12-28 02:59:07,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:59:07,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:59:07,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:59:07,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:59:07,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:59:06" (1/3) ... [2021-12-28 02:59:07,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5909fc12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:59:07, skipping insertion in model container [2021-12-28 02:59:07,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:59:06" (2/3) ... [2021-12-28 02:59:07,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5909fc12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:59:07, skipping insertion in model container [2021-12-28 02:59:07,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:59:07" (3/3) ... [2021-12-28 02:59:07,333 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2021-12-28 02:59:07,336 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-28 02:59:07,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:59:07,336 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 02:59:07,337 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-28 02:59:07,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,358 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,359 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,359 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,360 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,360 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,360 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,360 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,363 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,365 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-28 02:59:07,368 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-28 02:59:07,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:59:07,405 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 [2021-12-28 02:59:07,406 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-28 02:59:07,418 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2021-12-28 02:59:07,496 INFO L129 PetriNetUnfolder]: 6/79 cut-off events. [2021-12-28 02:59:07,497 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 02:59:07,499 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 26 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2021-12-28 02:59:07,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2021-12-28 02:59:07,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2021-12-28 02:59:07,525 INFO L129 PetriNetUnfolder]: 6/69 cut-off events. [2021-12-28 02:59:07,525 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-28 02:59:07,525 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:59:07,526 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] [2021-12-28 02:59:07,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:59:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:59:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1132836851, now seen corresponding path program 1 times [2021-12-28 02:59:07,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:59:07,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445843523] [2021-12-28 02:59:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:59:07,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:59:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:59:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:59:07,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:59:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445843523] [2021-12-28 02:59:07,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445843523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:59:07,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:59:07,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 02:59:07,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622932307] [2021-12-28 02:59:07,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:59:07,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 02:59:07,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:59:07,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 02:59:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 02:59:07,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 81 [2021-12-28 02:59:07,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 152 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:07,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:59:07,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 81 [2021-12-28 02:59:07,760 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:59:07,787 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2021-12-28 02:59:07,787 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-28 02:59:07,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 66 events. 2/66 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 6/68 useless extension candidates. Maximal degree in co-relation 47. Up to 5 conditions per place. [2021-12-28 02:59:07,790 INFO L132 encePairwiseOnDemand]: 77/81 looper letters, 4 selfloop transitions, 0 changer transitions 2/66 dead transitions. [2021-12-28 02:59:07,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2021-12-28 02:59:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 02:59:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-28 02:59:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2021-12-28 02:59:07,808 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9382716049382716 [2021-12-28 02:59:07,809 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2021-12-28 02:59:07,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2021-12-28 02:59:07,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:59:07,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2021-12-28 02:59:07,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:07,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:07,821 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:07,823 INFO L186 Difference]: Start difference. First operand has 71 places, 70 transitions, 152 flow. Second operand 2 states and 152 transitions. [2021-12-28 02:59:07,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2021-12-28 02:59:07,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-28 02:59:07,831 INFO L242 Difference]: Finished difference. Result has 68 places, 64 transitions, 132 flow [2021-12-28 02:59:07,832 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=132, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2021-12-28 02:59:07,835 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2021-12-28 02:59:07,836 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 132 flow [2021-12-28 02:59:07,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:07,836 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:59:07,836 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] [2021-12-28 02:59:07,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:59:07,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:59:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:59:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash -2129909204, now seen corresponding path program 1 times [2021-12-28 02:59:07,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:59:07,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077212587] [2021-12-28 02:59:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:59:07,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:59:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:59:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:59:08,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:59:08,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077212587] [2021-12-28 02:59:08,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077212587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:59:08,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:59:08,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:59:08,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251614838] [2021-12-28 02:59:08,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:59:08,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:59:08,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:59:08,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:59:08,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:59:08,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 81 [2021-12-28 02:59:08,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 54.57142857142857) internal successors, (382), 7 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:08,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:59:08,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 81 [2021-12-28 02:59:08,254 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:59:08,396 INFO L129 PetriNetUnfolder]: 31/147 cut-off events. [2021-12-28 02:59:08,397 INFO L130 PetriNetUnfolder]: For 8/20 co-relation queries the response was YES. [2021-12-28 02:59:08,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 147 events. 31/147 cut-off events. For 8/20 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 365 event pairs, 16 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 232. Up to 48 conditions per place. [2021-12-28 02:59:08,398 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 25 selfloop transitions, 5 changer transitions 4/76 dead transitions. [2021-12-28 02:59:08,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 227 flow [2021-12-28 02:59:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:59:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 02:59:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 399 transitions. [2021-12-28 02:59:08,401 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2021-12-28 02:59:08,401 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 399 transitions. [2021-12-28 02:59:08,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 399 transitions. [2021-12-28 02:59:08,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:59:08,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 399 transitions. [2021-12-28 02:59:08,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:08,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:08,405 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:08,405 INFO L186 Difference]: Start difference. First operand has 68 places, 64 transitions, 132 flow. Second operand 7 states and 399 transitions. [2021-12-28 02:59:08,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 227 flow [2021-12-28 02:59:08,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-28 02:59:08,407 INFO L242 Difference]: Finished difference. Result has 75 places, 66 transitions, 159 flow [2021-12-28 02:59:08,408 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=159, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2021-12-28 02:59:08,408 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2021-12-28 02:59:08,408 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 159 flow [2021-12-28 02:59:08,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.57142857142857) internal successors, (382), 7 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:08,409 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:59:08,409 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:59:08,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:59:08,409 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:59:08,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:59:08,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1998264494, now seen corresponding path program 1 times [2021-12-28 02:59:08,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:59:08,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760981888] [2021-12-28 02:59:08,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:59:08,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:59:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:59:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:59:08,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:59:08,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760981888] [2021-12-28 02:59:08,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760981888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:59:08,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506252064] [2021-12-28 02:59:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:59:08,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:59:08,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:59:08,611 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) [2021-12-28 02:59:08,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:59:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:59:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 02:59:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:59:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:59:09,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:59:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:59:09,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506252064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:59:09,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:59:09,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-28 02:59:09,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077414839] [2021-12-28 02:59:09,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:59:09,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:59:09,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:59:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:59:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:59:09,227 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2021-12-28 02:59:09,228 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 159 flow. Second operand has 10 states, 10 states have (on average 53.3) internal successors, (533), 10 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,228 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:59:09,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2021-12-28 02:59:09,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:59:09,444 INFO L129 PetriNetUnfolder]: 38/186 cut-off events. [2021-12-28 02:59:09,444 INFO L130 PetriNetUnfolder]: For 26/34 co-relation queries the response was YES. [2021-12-28 02:59:09,445 INFO L84 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 186 events. 38/186 cut-off events. For 26/34 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 595 event pairs, 3 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 338. Up to 36 conditions per place. [2021-12-28 02:59:09,446 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 40 selfloop transitions, 16 changer transitions 1/97 dead transitions. [2021-12-28 02:59:09,446 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 361 flow [2021-12-28 02:59:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:59:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-28 02:59:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 611 transitions. [2021-12-28 02:59:09,449 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6857463524130191 [2021-12-28 02:59:09,449 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 611 transitions. [2021-12-28 02:59:09,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 611 transitions. [2021-12-28 02:59:09,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:59:09,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 611 transitions. [2021-12-28 02:59:09,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 55.54545454545455) internal successors, (611), 11 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,454 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 81.0) internal successors, (972), 12 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,454 INFO L186 Difference]: Start difference. First operand has 75 places, 66 transitions, 159 flow. Second operand 11 states and 611 transitions. [2021-12-28 02:59:09,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 361 flow [2021-12-28 02:59:09,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 346 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-28 02:59:09,456 INFO L242 Difference]: Finished difference. Result has 84 places, 74 transitions, 244 flow [2021-12-28 02:59:09,457 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=244, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2021-12-28 02:59:09,457 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2021-12-28 02:59:09,457 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 244 flow [2021-12-28 02:59:09,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 53.3) internal successors, (533), 10 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,458 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:59:09,458 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:59:09,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:59:09,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:59:09,673 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:59:09,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:59:09,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2140770938, now seen corresponding path program 2 times [2021-12-28 02:59:09,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:59:09,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119787623] [2021-12-28 02:59:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:59:09,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:59:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:59:09,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:59:09,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:59:09,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119787623] [2021-12-28 02:59:09,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119787623] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:59:09,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:59:09,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:59:09,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137178851] [2021-12-28 02:59:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:59:09,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:59:09,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:59:09,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:59:09,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:59:09,818 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2021-12-28 02:59:09,819 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 244 flow. Second operand has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,819 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:59:09,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2021-12-28 02:59:09,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:59:09,900 INFO L129 PetriNetUnfolder]: 34/161 cut-off events. [2021-12-28 02:59:09,901 INFO L130 PetriNetUnfolder]: For 110/114 co-relation queries the response was YES. [2021-12-28 02:59:09,901 INFO L84 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 161 events. 34/161 cut-off events. For 110/114 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 466 event pairs, 10 based on Foata normal form. 3/157 useless extension candidates. Maximal degree in co-relation 388. Up to 66 conditions per place. [2021-12-28 02:59:09,902 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 32 selfloop transitions, 5 changer transitions 7/84 dead transitions. [2021-12-28 02:59:09,902 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 386 flow [2021-12-28 02:59:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:59:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-28 02:59:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 338 transitions. [2021-12-28 02:59:09,904 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6954732510288066 [2021-12-28 02:59:09,904 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 338 transitions. [2021-12-28 02:59:09,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 338 transitions. [2021-12-28 02:59:09,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:59:09,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 338 transitions. [2021-12-28 02:59:09,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,906 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 81.0) internal successors, (567), 7 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,906 INFO L186 Difference]: Start difference. First operand has 84 places, 74 transitions, 244 flow. Second operand 6 states and 338 transitions. [2021-12-28 02:59:09,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 386 flow [2021-12-28 02:59:09,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 373 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-12-28 02:59:09,920 INFO L242 Difference]: Finished difference. Result has 87 places, 74 transitions, 252 flow [2021-12-28 02:59:09,921 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2021-12-28 02:59:09,921 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2021-12-28 02:59:09,921 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 252 flow [2021-12-28 02:59:09,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:09,922 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:59:09,922 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:59:09,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:59:09,922 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:59:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:59:09,923 INFO L85 PathProgramCache]: Analyzing trace with hash 265794878, now seen corresponding path program 1 times [2021-12-28 02:59:09,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:59:09,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764002393] [2021-12-28 02:59:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:59:09,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:59:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:59:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:59:09,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:59:10,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764002393] [2021-12-28 02:59:10,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764002393] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:59:10,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:59:10,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:59:10,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107129635] [2021-12-28 02:59:10,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:59:10,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:59:10,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:59:10,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:59:10,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:59:10,003 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2021-12-28 02:59:10,003 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:10,003 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-28 02:59:10,003 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2021-12-28 02:59:10,003 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-28 02:59:10,105 INFO L129 PetriNetUnfolder]: 34/142 cut-off events. [2021-12-28 02:59:10,105 INFO L130 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2021-12-28 02:59:10,106 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 142 events. 34/142 cut-off events. For 93/93 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 317 event pairs, 3 based on Foata normal form. 3/143 useless extension candidates. Maximal degree in co-relation 374. Up to 52 conditions per place. [2021-12-28 02:59:10,108 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 33 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2021-12-28 02:59:10,108 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 409 flow [2021-12-28 02:59:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:59:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-28 02:59:10,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 389 transitions. [2021-12-28 02:59:10,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6860670194003528 [2021-12-28 02:59:10,110 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 389 transitions. [2021-12-28 02:59:10,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 389 transitions. [2021-12-28 02:59:10,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-28 02:59:10,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 389 transitions. [2021-12-28 02:59:10,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:10,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:10,112 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 81.0) internal successors, (648), 8 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:10,112 INFO L186 Difference]: Start difference. First operand has 87 places, 74 transitions, 252 flow. Second operand 7 states and 389 transitions. [2021-12-28 02:59:10,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 409 flow [2021-12-28 02:59:10,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 383 flow, removed 6 selfloop flow, removed 6 redundant places. [2021-12-28 02:59:10,116 INFO L242 Difference]: Finished difference. Result has 89 places, 77 transitions, 297 flow [2021-12-28 02:59:10,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=297, PETRI_PLACES=89, PETRI_TRANSITIONS=77} [2021-12-28 02:59:10,117 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2021-12-28 02:59:10,117 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 297 flow [2021-12-28 02:59:10,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 53.666666666666664) internal successors, (322), 6 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 02:59:10,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-28 02:59:10,118 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:59:10,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:59:10,118 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-28 02:59:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:59:10,119 INFO L85 PathProgramCache]: Analyzing trace with hash -323089442, now seen corresponding path program 1 times [2021-12-28 02:59:10,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:59:10,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77817595] [2021-12-28 02:59:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:59:10,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:59:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:59:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:59:10,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:59:10,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77817595] [2021-12-28 02:59:10,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77817595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:59:10,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732225893] [2021-12-28 02:59:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:59:10,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:59:10,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:59:10,552 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) [2021-12-28 02:59:10,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:59:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:59:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 02:59:10,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:00:26,263 WARN L228 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)