./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 ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/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-ff03de6 [2021-12-21 15:14:24,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 15:14:24,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 15:14:24,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 15:14:24,176 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 15:14:24,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 15:14:24,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 15:14:24,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 15:14:24,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 15:14:24,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 15:14:24,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 15:14:24,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 15:14:24,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 15:14:24,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 15:14:24,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 15:14:24,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 15:14:24,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 15:14:24,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 15:14:24,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 15:14:24,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 15:14:24,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 15:14:24,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 15:14:24,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 15:14:24,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 15:14:24,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 15:14:24,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 15:14:24,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 15:14:24,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 15:14:24,207 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 15:14:24,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 15:14:24,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 15:14:24,208 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 15:14:24,209 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 15:14:24,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 15:14:24,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 15:14:24,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 15:14:24,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 15:14:24,213 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 15:14:24,213 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 15:14:24,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 15:14:24,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 15:14:24,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 15:14:24,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 15:14:24,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 15:14:24,235 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 15:14:24,235 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 15:14:24,236 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 15:14:24,236 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 15:14:24,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 15:14:24,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 15:14:24,237 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 15:14:24,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 15:14:24,238 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 15:14:24,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 15:14:24,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 15:14:24,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 15:14:24,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 15:14:24,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 15:14:24,239 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 15:14:24,239 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 15:14:24,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 15:14:24,239 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 15:14:24,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 15:14:24,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 15:14:24,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 15:14:24,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 15:14:24,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:14:24,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 15:14:24,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 15:14:24,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 15:14:24,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 15:14:24,242 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 15:14:24,242 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 15:14:24,242 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 15:14:24,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 15:14:24,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 15:14:24,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3241bc7a4fb5fce7b9ee4eb3820005fca7c10e90159ff3c3ee85c2790d085281 [2021-12-21 15:14:24,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 15:14:24,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 15:14:24,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 15:14:24,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 15:14:24,449 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 15:14:24,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2021-12-21 15:14:24,499 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351168869/5e639e41a9fa4d5094da822bf7fd1277/FLAG4dd158af5 [2021-12-21 15:14:24,862 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 15:14:24,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp1x3.wvr.c [2021-12-21 15:14:24,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351168869/5e639e41a9fa4d5094da822bf7fd1277/FLAG4dd158af5 [2021-12-21 15:14:24,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/351168869/5e639e41a9fa4d5094da822bf7fd1277 [2021-12-21 15:14:24,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 15:14:24,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 15:14:24,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 15:14:24,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 15:14:24,885 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 15:14:24,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:14:24" (1/1) ... [2021-12-21 15:14:24,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15fc74e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:24, skipping insertion in model container [2021-12-21 15:14:24,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 03:14:24" (1/1) ... [2021-12-21 15:14:24,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 15:14:24,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 15:14:25,042 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] [2021-12-21 15:14:25,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:14:25,051 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 15:14:25,073 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] [2021-12-21 15:14:25,078 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 15:14:25,091 INFO L208 MainTranslator]: Completed translation [2021-12-21 15:14:25,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25 WrapperNode [2021-12-21 15:14:25,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 15:14:25,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 15:14:25,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 15:14:25,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 15:14:25,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,121 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2021-12-21 15:14:25,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 15:14:25,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 15:14:25,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 15:14:25,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 15:14:25,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 15:14:25,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 15:14:25,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 15:14:25,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 15:14:25,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (1/1) ... [2021-12-21 15:14:25,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 15:14:25,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:14:25,184 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 15:14:25,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 15:14:25,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 15:14:25,216 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-21 15:14:25,216 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-21 15:14:25,216 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-21 15:14:25,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-21 15:14:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 15:14:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 15:14:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 15:14:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 15:14:25,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 15:14:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 15:14:25,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 15:14:25,218 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-21 15:14:25,286 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 15:14:25,287 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 15:14:25,411 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 15:14:25,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 15:14:25,417 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 15:14:25,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:14:25 BoogieIcfgContainer [2021-12-21 15:14:25,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 15:14:25,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 15:14:25,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 15:14:25,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 15:14:25,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 03:14:24" (1/3) ... [2021-12-21 15:14:25,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293ff811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:14:25, skipping insertion in model container [2021-12-21 15:14:25,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 03:14:25" (2/3) ... [2021-12-21 15:14:25,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@293ff811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 03:14:25, skipping insertion in model container [2021-12-21 15:14:25,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 03:14:25" (3/3) ... [2021-12-21 15:14:25,424 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp1x3.wvr.c [2021-12-21 15:14:25,428 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-21 15:14:25,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 15:14:25,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 15:14:25,428 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-21 15:14:25,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,451 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,453 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,453 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,453 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,453 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,460 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,460 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,462 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-21 15:14:25,476 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-21 15:14:25,521 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 15:14:25,528 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 15:14:25,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-21 15:14:25,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2021-12-21 15:14:25,596 INFO L129 PetriNetUnfolder]: 6/79 cut-off events. [2021-12-21 15:14:25,598 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:14:25,601 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. [2021-12-21 15:14:25,602 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2021-12-21 15:14:25,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2021-12-21 15:14:25,625 INFO L129 PetriNetUnfolder]: 6/69 cut-off events. [2021-12-21 15:14:25,625 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-21 15:14:25,625 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:14:25,626 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] [2021-12-21 15:14:25,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:14:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:14:25,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1132836851, now seen corresponding path program 1 times [2021-12-21 15:14:25,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:14:25,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468123061] [2021-12-21 15:14:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:14:25,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:14:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:14:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:14:25,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:14:25,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468123061] [2021-12-21 15:14:25,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468123061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:14:25,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:14:25,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 15:14:25,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039403614] [2021-12-21 15:14:25,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:14:25,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 15:14:25,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:14:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 15:14:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 15:14:25,821 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 81 [2021-12-21 15:14:25,823 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) [2021-12-21 15:14:25,824 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:14:25,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 81 [2021-12-21 15:14:25,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:14:25,862 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2021-12-21 15:14:25,862 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-21 15:14:25,863 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. [2021-12-21 15:14:25,864 INFO L132 encePairwiseOnDemand]: 77/81 looper letters, 4 selfloop transitions, 0 changer transitions 2/66 dead transitions. [2021-12-21 15:14:25,865 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 66 transitions, 152 flow [2021-12-21 15:14:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 15:14:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-21 15:14:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2021-12-21 15:14:25,880 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9382716049382716 [2021-12-21 15:14:25,881 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2021-12-21 15:14:25,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2021-12-21 15:14:25,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:14:25,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2021-12-21 15:14:25,889 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) [2021-12-21 15:14:25,896 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) [2021-12-21 15:14:25,896 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) [2021-12-21 15:14:25,898 INFO L186 Difference]: Start difference. First operand has 71 places, 70 transitions, 152 flow. Second operand 2 states and 152 transitions. [2021-12-21 15:14:25,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 66 transitions, 152 flow [2021-12-21 15:14:25,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-12-21 15:14:25,906 INFO L242 Difference]: Finished difference. Result has 68 places, 64 transitions, 132 flow [2021-12-21 15:14:25,908 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} [2021-12-21 15:14:25,912 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2021-12-21 15:14:25,912 INFO L470 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 132 flow [2021-12-21 15:14:25,912 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) [2021-12-21 15:14:25,913 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:14:25,913 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] [2021-12-21 15:14:25,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 15:14:25,914 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:14:25,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:14:25,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2129909204, now seen corresponding path program 1 times [2021-12-21 15:14:25,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:14:25,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532406726] [2021-12-21 15:14:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:14:25,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:14:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:14:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:14:26,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:14:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532406726] [2021-12-21 15:14:26,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532406726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:14:26,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:14:26,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 15:14:26,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386013514] [2021-12-21 15:14:26,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:14:26,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 15:14:26,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:14:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 15:14:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 15:14:26,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 81 [2021-12-21 15:14:26,202 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) [2021-12-21 15:14:26,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:14:26,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 81 [2021-12-21 15:14:26,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:14:26,359 INFO L129 PetriNetUnfolder]: 31/147 cut-off events. [2021-12-21 15:14:26,360 INFO L130 PetriNetUnfolder]: For 8/20 co-relation queries the response was YES. [2021-12-21 15:14:26,361 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. [2021-12-21 15:14:26,362 INFO L132 encePairwiseOnDemand]: 73/81 looper letters, 25 selfloop transitions, 5 changer transitions 4/76 dead transitions. [2021-12-21 15:14:26,362 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 227 flow [2021-12-21 15:14:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:14:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:14:26,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 399 transitions. [2021-12-21 15:14:26,369 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2021-12-21 15:14:26,369 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 399 transitions. [2021-12-21 15:14:26,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 399 transitions. [2021-12-21 15:14:26,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:14:26,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 399 transitions. [2021-12-21 15:14:26,372 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) [2021-12-21 15:14:26,374 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) [2021-12-21 15:14:26,375 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) [2021-12-21 15:14:26,375 INFO L186 Difference]: Start difference. First operand has 68 places, 64 transitions, 132 flow. Second operand 7 states and 399 transitions. [2021-12-21 15:14:26,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 227 flow [2021-12-21 15:14:26,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 76 transitions, 227 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-21 15:14:26,378 INFO L242 Difference]: Finished difference. Result has 75 places, 66 transitions, 159 flow [2021-12-21 15:14:26,378 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} [2021-12-21 15:14:26,379 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2021-12-21 15:14:26,379 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 159 flow [2021-12-21 15:14:26,379 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) [2021-12-21 15:14:26,379 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:14:26,379 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 15:14:26,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 15:14:26,380 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:14:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:14:26,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1998264494, now seen corresponding path program 1 times [2021-12-21 15:14:26,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:14:26,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858592056] [2021-12-21 15:14:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:14:26,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:14:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:14:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:14:26,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:14:26,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858592056] [2021-12-21 15:14:26,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858592056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:14:26,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64572275] [2021-12-21 15:14:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:14:26,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:14:26,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:14:26,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:14:26,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 15:14:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:14:26,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 15:14:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 15:14:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:14:26,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 15:14:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:14:27,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64572275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 15:14:27,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 15:14:27,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-21 15:14:27,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484451362] [2021-12-21 15:14:27,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 15:14:27,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 15:14:27,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:14:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 15:14:27,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 15:14:27,188 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2021-12-21 15:14:27,189 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) [2021-12-21 15:14:27,189 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:14:27,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2021-12-21 15:14:27,189 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:14:27,424 INFO L129 PetriNetUnfolder]: 38/186 cut-off events. [2021-12-21 15:14:27,424 INFO L130 PetriNetUnfolder]: For 26/34 co-relation queries the response was YES. [2021-12-21 15:14:27,425 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. [2021-12-21 15:14:27,425 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 40 selfloop transitions, 16 changer transitions 1/97 dead transitions. [2021-12-21 15:14:27,425 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 97 transitions, 361 flow [2021-12-21 15:14:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 15:14:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-12-21 15:14:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 611 transitions. [2021-12-21 15:14:27,428 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6857463524130191 [2021-12-21 15:14:27,428 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 611 transitions. [2021-12-21 15:14:27,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 611 transitions. [2021-12-21 15:14:27,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:14:27,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 611 transitions. [2021-12-21 15:14:27,429 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) [2021-12-21 15:14:27,431 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) [2021-12-21 15:14:27,431 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) [2021-12-21 15:14:27,432 INFO L186 Difference]: Start difference. First operand has 75 places, 66 transitions, 159 flow. Second operand 11 states and 611 transitions. [2021-12-21 15:14:27,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 97 transitions, 361 flow [2021-12-21 15:14:27,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 346 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-21 15:14:27,434 INFO L242 Difference]: Finished difference. Result has 84 places, 74 transitions, 244 flow [2021-12-21 15:14:27,434 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} [2021-12-21 15:14:27,435 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 13 predicate places. [2021-12-21 15:14:27,435 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 244 flow [2021-12-21 15:14:27,436 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) [2021-12-21 15:14:27,436 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:14:27,436 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] [2021-12-21 15:14:27,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 15:14:27,639 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 [2021-12-21 15:14:27,640 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:14:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:14:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2140770938, now seen corresponding path program 2 times [2021-12-21 15:14:27,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:14:27,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989674593] [2021-12-21 15:14:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:14:27,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:14:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:14:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:14:27,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:14:27,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989674593] [2021-12-21 15:14:27,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989674593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:14:27,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:14:27,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:14:27,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903370357] [2021-12-21 15:14:27,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:14:27,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:14:27,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:14:27,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:14:27,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:14:27,792 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2021-12-21 15:14:27,793 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) [2021-12-21 15:14:27,793 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:14:27,794 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2021-12-21 15:14:27,794 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:14:27,882 INFO L129 PetriNetUnfolder]: 34/161 cut-off events. [2021-12-21 15:14:27,882 INFO L130 PetriNetUnfolder]: For 110/114 co-relation queries the response was YES. [2021-12-21 15:14:27,884 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. [2021-12-21 15:14:27,884 INFO L132 encePairwiseOnDemand]: 72/81 looper letters, 32 selfloop transitions, 5 changer transitions 7/84 dead transitions. [2021-12-21 15:14:27,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 386 flow [2021-12-21 15:14:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 15:14:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-12-21 15:14:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 338 transitions. [2021-12-21 15:14:27,886 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6954732510288066 [2021-12-21 15:14:27,886 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 338 transitions. [2021-12-21 15:14:27,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 338 transitions. [2021-12-21 15:14:27,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:14:27,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 338 transitions. [2021-12-21 15:14:27,887 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) [2021-12-21 15:14:27,887 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) [2021-12-21 15:14:27,888 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) [2021-12-21 15:14:27,888 INFO L186 Difference]: Start difference. First operand has 84 places, 74 transitions, 244 flow. Second operand 6 states and 338 transitions. [2021-12-21 15:14:27,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 386 flow [2021-12-21 15:14:27,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 373 flow, removed 2 selfloop flow, removed 4 redundant places. [2021-12-21 15:14:27,895 INFO L242 Difference]: Finished difference. Result has 87 places, 74 transitions, 252 flow [2021-12-21 15:14:27,895 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} [2021-12-21 15:14:27,896 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2021-12-21 15:14:27,896 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 252 flow [2021-12-21 15:14:27,896 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) [2021-12-21 15:14:27,896 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:14:27,896 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] [2021-12-21 15:14:27,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 15:14:27,896 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:14:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:14:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash 265794878, now seen corresponding path program 1 times [2021-12-21 15:14:27,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:14:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228271023] [2021-12-21 15:14:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:14:27,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:14:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:14:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:14:27,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:14:27,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228271023] [2021-12-21 15:14:27,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228271023] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 15:14:27,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 15:14:27,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 15:14:27,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158305580] [2021-12-21 15:14:27,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 15:14:27,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 15:14:27,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 15:14:27,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 15:14:27,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 15:14:27,959 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 81 [2021-12-21 15:14:27,960 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) [2021-12-21 15:14:27,960 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-21 15:14:27,960 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 81 [2021-12-21 15:14:27,960 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-21 15:14:28,060 INFO L129 PetriNetUnfolder]: 34/142 cut-off events. [2021-12-21 15:14:28,060 INFO L130 PetriNetUnfolder]: For 93/93 co-relation queries the response was YES. [2021-12-21 15:14:28,061 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. [2021-12-21 15:14:28,062 INFO L132 encePairwiseOnDemand]: 70/81 looper letters, 33 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2021-12-21 15:14:28,062 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 409 flow [2021-12-21 15:14:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 15:14:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-21 15:14:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 389 transitions. [2021-12-21 15:14:28,063 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6860670194003528 [2021-12-21 15:14:28,063 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 389 transitions. [2021-12-21 15:14:28,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 389 transitions. [2021-12-21 15:14:28,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-21 15:14:28,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 389 transitions. [2021-12-21 15:14:28,065 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) [2021-12-21 15:14:28,066 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) [2021-12-21 15:14:28,066 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) [2021-12-21 15:14:28,066 INFO L186 Difference]: Start difference. First operand has 87 places, 74 transitions, 252 flow. Second operand 7 states and 389 transitions. [2021-12-21 15:14:28,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 409 flow [2021-12-21 15:14:28,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 383 flow, removed 6 selfloop flow, removed 6 redundant places. [2021-12-21 15:14:28,069 INFO L242 Difference]: Finished difference. Result has 89 places, 77 transitions, 297 flow [2021-12-21 15:14:28,069 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} [2021-12-21 15:14:28,070 INFO L334 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2021-12-21 15:14:28,070 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 77 transitions, 297 flow [2021-12-21 15:14:28,070 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) [2021-12-21 15:14:28,070 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-21 15:14:28,071 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] [2021-12-21 15:14:28,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 15:14:28,071 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-12-21 15:14:28,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 15:14:28,071 INFO L85 PathProgramCache]: Analyzing trace with hash -323089442, now seen corresponding path program 1 times [2021-12-21 15:14:28,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 15:14:28,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843409015] [2021-12-21 15:14:28,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:14:28,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 15:14:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:14:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 15:14:28,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 15:14:28,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843409015] [2021-12-21 15:14:28,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843409015] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 15:14:28,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713901380] [2021-12-21 15:14:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 15:14:28,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 15:14:28,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 15:14:28,441 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 15:14:28,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 15:14:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 15:14:28,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 15:14:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates...