./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/bench-exp3x3.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 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 22:39:28,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 22:39:28,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 22:39:28,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 22:39:28,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 22:39:28,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 22:39:28,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 22:39:28,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 22:39:28,137 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 22:39:28,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 22:39:28,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 22:39:28,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 22:39:28,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 22:39:28,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 22:39:28,145 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 22:39:28,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 22:39:28,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 22:39:28,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 22:39:28,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 22:39:28,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 22:39:28,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 22:39:28,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 22:39:28,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 22:39:28,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 22:39:28,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 22:39:28,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 22:39:28,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 22:39:28,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 22:39:28,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 22:39:28,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 22:39:28,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 22:39:28,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 22:39:28,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 22:39:28,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 22:39:28,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 22:39:28,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 22:39:28,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 22:39:28,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 22:39:28,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 22:39:28,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 22:39:28,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 22:39:28,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 22:39:28,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 22:39:28,197 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 22:39:28,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 22:39:28,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 22:39:28,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 22:39:28,199 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 22:39:28,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 22:39:28,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 22:39:28,199 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 22:39:28,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 22:39:28,200 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 22:39:28,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 22:39:28,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 22:39:28,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 22:39:28,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 22:39:28,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 22:39:28,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 22:39:28,201 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 22:39:28,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 22:39:28,202 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 22:39:28,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 22:39:28,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 22:39:28,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 22:39:28,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 22:39:28,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:39:28,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 22:39:28,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 22:39:28,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 22:39:28,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 22:39:28,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 22:39:28,205 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 22:39:28,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 22:39:28,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 22:39:28,205 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 22:39:28,206 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 753355d7d8c08568df49ed9a7977f84d185e0dbf04984bcb7908b11aa84a04b9 [2021-12-17 22:39:28,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 22:39:28,383 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 22:39:28,385 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 22:39:28,386 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 22:39:28,386 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 22:39:28,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-12-17 22:39:28,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bba83a79/d0adb112323f414e9bc7d1d75dfee9ae/FLAGec270bf3f [2021-12-17 22:39:28,786 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 22:39:28,787 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/bench-exp3x3.wvr.c [2021-12-17 22:39:28,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bba83a79/d0adb112323f414e9bc7d1d75dfee9ae/FLAGec270bf3f [2021-12-17 22:39:29,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bba83a79/d0adb112323f414e9bc7d1d75dfee9ae [2021-12-17 22:39:29,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 22:39:29,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 22:39:29,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 22:39:29,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 22:39:29,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 22:39:29,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@86e45ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29, skipping insertion in model container [2021-12-17 22:39:29,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 22:39:29,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 22:39:29,408 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-exp3x3.wvr.c[2625,2638] [2021-12-17 22:39:29,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:39:29,418 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 22:39:29,453 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-exp3x3.wvr.c[2625,2638] [2021-12-17 22:39:29,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 22:39:29,465 INFO L208 MainTranslator]: Completed translation [2021-12-17 22:39:29,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29 WrapperNode [2021-12-17 22:39:29,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 22:39:29,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 22:39:29,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 22:39:29,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 22:39:29,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,483 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,504 INFO L137 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2021-12-17 22:39:29,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 22:39:29,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 22:39:29,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 22:39:29,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 22:39:29,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 22:39:29,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 22:39:29,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 22:39:29,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 22:39:29,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (1/1) ... [2021-12-17 22:39:29,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 22:39:29,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:39:29,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 22:39:29,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 22:39:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 22:39:29,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-12-17 22:39:29,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-12-17 22:39:29,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-12-17 22:39:29,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-12-17 22:39:29,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-12-17 22:39:29,615 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-12-17 22:39:29,615 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-12-17 22:39:29,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-12-17 22:39:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 22:39:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-12-17 22:39:29,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-12-17 22:39:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-12-17 22:39:29,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-12-17 22:39:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 22:39:29,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 22:39:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 22:39:29,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 22:39:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 22:39:29,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 22:39:29,618 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-17 22:39:29,735 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 22:39:29,736 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 22:39:29,994 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 22:39:30,001 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 22:39:30,001 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-17 22:39:30,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:39:30 BoogieIcfgContainer [2021-12-17 22:39:30,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 22:39:30,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 22:39:30,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 22:39:30,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 22:39:30,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 10:39:29" (1/3) ... [2021-12-17 22:39:30,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647c7d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:39:30, skipping insertion in model container [2021-12-17 22:39:30,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 10:39:29" (2/3) ... [2021-12-17 22:39:30,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@647c7d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 10:39:30, skipping insertion in model container [2021-12-17 22:39:30,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 10:39:30" (3/3) ... [2021-12-17 22:39:30,008 INFO L111 eAbstractionObserver]: Analyzing ICFG bench-exp3x3.wvr.c [2021-12-17 22:39:30,011 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-17 22:39:30,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 22:39:30,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 22:39:30,012 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-17 22:39:30,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,036 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,037 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,037 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,037 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,037 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,038 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,039 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,039 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,039 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,039 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,039 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,040 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,040 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,040 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,040 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,040 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,041 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,041 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,042 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,043 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,045 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,045 WARN L322 ript$VariableManager]: TermVariabe |thread5Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,045 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,046 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,046 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,046 WARN L322 ript$VariableManager]: TermVariabe |thread6Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,047 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,047 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,047 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-17 22:39:30,060 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-12-17 22:39:30,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 22:39:30,092 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 22:39:30,092 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-17 22:39:30,103 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 174 places, 169 transitions, 386 flow [2021-12-17 22:39:30,161 INFO L129 PetriNetUnfolder]: 14/163 cut-off events. [2021-12-17 22:39:30,162 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-17 22:39:30,167 INFO L84 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 163 events. 14/163 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2021-12-17 22:39:30,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 169 transitions, 386 flow [2021-12-17 22:39:30,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 146 transitions, 328 flow [2021-12-17 22:39:30,211 INFO L129 PetriNetUnfolder]: 14/145 cut-off events. [2021-12-17 22:39:30,211 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-17 22:39:30,212 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:39:30,212 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:39:30,213 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-17 22:39:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:39:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1565365569, now seen corresponding path program 1 times [2021-12-17 22:39:30,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:39:30,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563281974] [2021-12-17 22:39:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:39:30,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:39:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:39:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:39:30,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:39:30,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563281974] [2021-12-17 22:39:30,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563281974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:39:30,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:39:30,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 22:39:30,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442455274] [2021-12-17 22:39:30,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:39:30,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 22:39:30,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:39:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 22:39:30,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 22:39:30,531 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 169 [2021-12-17 22:39:30,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 146 transitions, 328 flow. Second operand has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:30,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:39:30,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 169 [2021-12-17 22:39:30,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:39:30,593 INFO L129 PetriNetUnfolder]: 6/138 cut-off events. [2021-12-17 22:39:30,594 INFO L130 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2021-12-17 22:39:30,595 INFO L84 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 138 events. 6/138 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 38/168 useless extension candidates. Maximal degree in co-relation 119. Up to 13 conditions per place. [2021-12-17 22:39:30,598 INFO L132 encePairwiseOnDemand]: 161/169 looper letters, 12 selfloop transitions, 0 changer transitions 2/138 dead transitions. [2021-12-17 22:39:30,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 138 transitions, 336 flow [2021-12-17 22:39:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 22:39:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-17 22:39:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 316 transitions. [2021-12-17 22:39:30,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9349112426035503 [2021-12-17 22:39:30,617 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 316 transitions. [2021-12-17 22:39:30,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 316 transitions. [2021-12-17 22:39:30,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:39:30,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 316 transitions. [2021-12-17 22:39:30,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 158.0) internal successors, (316), 2 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:30,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:30,631 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 169.0) internal successors, (507), 3 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:30,633 INFO L186 Difference]: Start difference. First operand has 151 places, 146 transitions, 328 flow. Second operand 2 states and 316 transitions. [2021-12-17 22:39:30,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 138 transitions, 336 flow [2021-12-17 22:39:30,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 138 transitions, 312 flow, removed 0 selfloop flow, removed 12 redundant places. [2021-12-17 22:39:30,640 INFO L242 Difference]: Finished difference. Result has 140 places, 136 transitions, 284 flow [2021-12-17 22:39:30,641 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=284, PETRI_PLACES=140, PETRI_TRANSITIONS=136} [2021-12-17 22:39:30,645 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -11 predicate places. [2021-12-17 22:39:30,645 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 136 transitions, 284 flow [2021-12-17 22:39:30,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 154.5) internal successors, (309), 2 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:30,646 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:39:30,646 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:39:30,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 22:39:30,647 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-17 22:39:30,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:39:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash -616084000, now seen corresponding path program 1 times [2021-12-17 22:39:30,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:39:30,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832109342] [2021-12-17 22:39:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:39:30,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:39:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:39:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:39:31,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:39:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832109342] [2021-12-17 22:39:31,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832109342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:39:31,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:39:31,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 22:39:31,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762812337] [2021-12-17 22:39:31,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:39:31,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 22:39:31,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:39:31,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 22:39:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 22:39:31,245 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 169 [2021-12-17 22:39:31,246 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 136 transitions, 284 flow. Second operand has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:31,246 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:39:31,247 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 169 [2021-12-17 22:39:31,247 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:39:33,429 INFO L129 PetriNetUnfolder]: 13855/19795 cut-off events. [2021-12-17 22:39:33,430 INFO L130 PetriNetUnfolder]: For 728/910 co-relation queries the response was YES. [2021-12-17 22:39:33,466 INFO L84 FinitePrefix]: Finished finitePrefix Result has 37315 conditions, 19795 events. 13855/19795 cut-off events. For 728/910 co-relation queries the response was YES. Maximal size of possible extension queue 1028. Compared 113714 event pairs, 8389 based on Foata normal form. 1/13760 useless extension candidates. Maximal degree in co-relation 37312. Up to 10952 conditions per place. [2021-12-17 22:39:33,597 INFO L132 encePairwiseOnDemand]: 157/169 looper letters, 69 selfloop transitions, 9 changer transitions 4/168 dead transitions. [2021-12-17 22:39:33,597 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 168 transitions, 523 flow [2021-12-17 22:39:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:39:33,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:39:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 839 transitions. [2021-12-17 22:39:33,601 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7092138630600169 [2021-12-17 22:39:33,601 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 839 transitions. [2021-12-17 22:39:33,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 839 transitions. [2021-12-17 22:39:33,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:39:33,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 839 transitions. [2021-12-17 22:39:33,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 119.85714285714286) internal successors, (839), 7 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:33,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:33,607 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:33,607 INFO L186 Difference]: Start difference. First operand has 140 places, 136 transitions, 284 flow. Second operand 7 states and 839 transitions. [2021-12-17 22:39:33,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 168 transitions, 523 flow [2021-12-17 22:39:33,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 523 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-17 22:39:33,613 INFO L242 Difference]: Finished difference. Result has 147 places, 142 transitions, 339 flow [2021-12-17 22:39:33,613 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=147, PETRI_TRANSITIONS=142} [2021-12-17 22:39:33,614 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -4 predicate places. [2021-12-17 22:39:33,614 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 142 transitions, 339 flow [2021-12-17 22:39:33,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.42857142857143) internal successors, (794), 7 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:33,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:39:33,615 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:39:33,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 22:39:33,615 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-17 22:39:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:39:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1758121540, now seen corresponding path program 1 times [2021-12-17 22:39:33,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:39:33,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235123768] [2021-12-17 22:39:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:39:33,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:39:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:39:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:39:33,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:39:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235123768] [2021-12-17 22:39:33,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235123768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:39:33,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:39:33,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:39:33,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049618984] [2021-12-17 22:39:33,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:39:33,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:39:33,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:39:33,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:39:33,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:39:33,735 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 169 [2021-12-17 22:39:33,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 142 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:33,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:39:33,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 169 [2021-12-17 22:39:33,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:39:35,555 INFO L129 PetriNetUnfolder]: 16430/26087 cut-off events. [2021-12-17 22:39:35,556 INFO L130 PetriNetUnfolder]: For 2990/3236 co-relation queries the response was YES. [2021-12-17 22:39:35,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51433 conditions, 26087 events. 16430/26087 cut-off events. For 2990/3236 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 194274 event pairs, 2545 based on Foata normal form. 3/17950 useless extension candidates. Maximal degree in co-relation 51426. Up to 7745 conditions per place. [2021-12-17 22:39:35,776 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 88 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2021-12-17 22:39:35,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 207 transitions, 726 flow [2021-12-17 22:39:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:39:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:39:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 930 transitions. [2021-12-17 22:39:35,779 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7861369399830939 [2021-12-17 22:39:35,779 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 930 transitions. [2021-12-17 22:39:35,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 930 transitions. [2021-12-17 22:39:35,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:39:35,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 930 transitions. [2021-12-17 22:39:35,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.85714285714286) internal successors, (930), 7 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:35,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:35,784 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:35,784 INFO L186 Difference]: Start difference. First operand has 147 places, 142 transitions, 339 flow. Second operand 7 states and 930 transitions. [2021-12-17 22:39:35,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 207 transitions, 726 flow [2021-12-17 22:39:35,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 207 transitions, 705 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-12-17 22:39:35,789 INFO L242 Difference]: Finished difference. Result has 149 places, 152 transitions, 430 flow [2021-12-17 22:39:35,789 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=149, PETRI_TRANSITIONS=152} [2021-12-17 22:39:35,790 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, -2 predicate places. [2021-12-17 22:39:35,790 INFO L470 AbstractCegarLoop]: Abstraction has has 149 places, 152 transitions, 430 flow [2021-12-17 22:39:35,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:35,790 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:39:35,791 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:39:35,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 22:39:35,791 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-17 22:39:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:39:35,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1840856944, now seen corresponding path program 2 times [2021-12-17 22:39:35,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:39:35,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342151950] [2021-12-17 22:39:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:39:35,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:39:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:39:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:39:35,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:39:35,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342151950] [2021-12-17 22:39:35,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342151950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:39:35,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:39:35,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:39:35,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254628800] [2021-12-17 22:39:35,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:39:35,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:39:35,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:39:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:39:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:39:35,932 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 169 [2021-12-17 22:39:35,932 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 152 transitions, 430 flow. Second operand has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:35,933 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:39:35,933 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 169 [2021-12-17 22:39:35,933 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:39:37,930 INFO L129 PetriNetUnfolder]: 17692/26270 cut-off events. [2021-12-17 22:39:37,931 INFO L130 PetriNetUnfolder]: For 17985/18216 co-relation queries the response was YES. [2021-12-17 22:39:38,010 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61618 conditions, 26270 events. 17692/26270 cut-off events. For 17985/18216 co-relation queries the response was YES. Maximal size of possible extension queue 1547. Compared 174562 event pairs, 9923 based on Foata normal form. 584/20347 useless extension candidates. Maximal degree in co-relation 61610. Up to 5895 conditions per place. [2021-12-17 22:39:38,123 INFO L132 encePairwiseOnDemand]: 158/169 looper letters, 93 selfloop transitions, 19 changer transitions 0/212 dead transitions. [2021-12-17 22:39:38,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 212 transitions, 828 flow [2021-12-17 22:39:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:39:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:39:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 930 transitions. [2021-12-17 22:39:38,125 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7861369399830939 [2021-12-17 22:39:38,126 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 930 transitions. [2021-12-17 22:39:38,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 930 transitions. [2021-12-17 22:39:38,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:39:38,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 930 transitions. [2021-12-17 22:39:38,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.85714285714286) internal successors, (930), 7 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:38,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:38,131 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:38,131 INFO L186 Difference]: Start difference. First operand has 149 places, 152 transitions, 430 flow. Second operand 7 states and 930 transitions. [2021-12-17 22:39:38,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 212 transitions, 828 flow [2021-12-17 22:39:38,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 212 transitions, 824 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-17 22:39:38,142 INFO L242 Difference]: Finished difference. Result has 157 places, 157 transitions, 539 flow [2021-12-17 22:39:38,143 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=539, PETRI_PLACES=157, PETRI_TRANSITIONS=157} [2021-12-17 22:39:38,144 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 6 predicate places. [2021-12-17 22:39:38,144 INFO L470 AbstractCegarLoop]: Abstraction has has 157 places, 157 transitions, 539 flow [2021-12-17 22:39:38,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:38,144 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:39:38,144 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:39:38,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 22:39:38,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-17 22:39:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:39:38,145 INFO L85 PathProgramCache]: Analyzing trace with hash 857833642, now seen corresponding path program 1 times [2021-12-17 22:39:38,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:39:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310724133] [2021-12-17 22:39:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:39:38,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:39:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:39:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:39:38,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:39:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310724133] [2021-12-17 22:39:38,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310724133] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:39:38,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056550502] [2021-12-17 22:39:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:39:38,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:39:38,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:39:38,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:39:38,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 22:39:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:39:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 22:39:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:39:58,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:39:58,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:39:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:39:58,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056550502] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:39:58,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:39:58,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-17 22:39:58,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229243956] [2021-12-17 22:39:58,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:39:58,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 22:39:58,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:39:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 22:39:58,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-17 22:39:58,585 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 169 [2021-12-17 22:39:58,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 157 transitions, 539 flow. Second operand has 10 states, 10 states have (on average 122.9) internal successors, (1229), 10 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:39:58,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:39:58,586 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 169 [2021-12-17 22:39:58,586 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:40:01,081 INFO L129 PetriNetUnfolder]: 23297/33908 cut-off events. [2021-12-17 22:40:01,081 INFO L130 PetriNetUnfolder]: For 36328/36742 co-relation queries the response was YES. [2021-12-17 22:40:01,198 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93230 conditions, 33908 events. 23297/33908 cut-off events. For 36328/36742 co-relation queries the response was YES. Maximal size of possible extension queue 1661. Compared 228696 event pairs, 7347 based on Foata normal form. 699/25551 useless extension candidates. Maximal degree in co-relation 93218. Up to 7776 conditions per place. [2021-12-17 22:40:01,357 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 150 selfloop transitions, 22 changer transitions 0/272 dead transitions. [2021-12-17 22:40:01,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 272 transitions, 1272 flow [2021-12-17 22:40:01,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 22:40:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 22:40:01,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1575 transitions. [2021-12-17 22:40:01,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7766272189349113 [2021-12-17 22:40:01,360 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1575 transitions. [2021-12-17 22:40:01,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1575 transitions. [2021-12-17 22:40:01,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:40:01,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1575 transitions. [2021-12-17 22:40:01,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 131.25) internal successors, (1575), 12 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:01,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:01,366 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:01,366 INFO L186 Difference]: Start difference. First operand has 157 places, 157 transitions, 539 flow. Second operand 12 states and 1575 transitions. [2021-12-17 22:40:01,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 272 transitions, 1272 flow [2021-12-17 22:40:01,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 272 transitions, 1260 flow, removed 4 selfloop flow, removed 2 redundant places. [2021-12-17 22:40:01,488 INFO L242 Difference]: Finished difference. Result has 173 places, 166 transitions, 687 flow [2021-12-17 22:40:01,488 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=687, PETRI_PLACES=173, PETRI_TRANSITIONS=166} [2021-12-17 22:40:01,489 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 22 predicate places. [2021-12-17 22:40:01,489 INFO L470 AbstractCegarLoop]: Abstraction has has 173 places, 166 transitions, 687 flow [2021-12-17 22:40:01,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 122.9) internal successors, (1229), 10 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:01,489 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:40:01,490 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:40:01,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 22:40:01,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:40:01,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-17 22:40:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:40:01,695 INFO L85 PathProgramCache]: Analyzing trace with hash -114986796, now seen corresponding path program 1 times [2021-12-17 22:40:01,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:40:01,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411821627] [2021-12-17 22:40:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:40:01,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:40:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:40:01,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:40:01,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:40:01,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411821627] [2021-12-17 22:40:01,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411821627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:40:01,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101946519] [2021-12-17 22:40:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:40:01,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:40:01,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:40:01,800 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:40:01,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 22:40:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:40:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 22:40:01,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:40:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:40:04,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:40:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:40:04,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101946519] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:40:04,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:40:04,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-17 22:40:04,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995411987] [2021-12-17 22:40:04,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:40:04,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 22:40:04,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:40:04,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 22:40:04,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-17 22:40:04,499 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 169 [2021-12-17 22:40:04,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 166 transitions, 687 flow. Second operand has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:04,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:40:04,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 169 [2021-12-17 22:40:04,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:40:12,672 INFO L129 PetriNetUnfolder]: 61384/95227 cut-off events. [2021-12-17 22:40:12,673 INFO L130 PetriNetUnfolder]: For 201994/208884 co-relation queries the response was YES. [2021-12-17 22:40:13,157 INFO L84 FinitePrefix]: Finished finitePrefix Result has 258652 conditions, 95227 events. 61384/95227 cut-off events. For 201994/208884 co-relation queries the response was YES. Maximal size of possible extension queue 4794. Compared 812832 event pairs, 12876 based on Foata normal form. 3087/76594 useless extension candidates. Maximal degree in co-relation 258633. Up to 19077 conditions per place. [2021-12-17 22:40:13,820 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 223 selfloop transitions, 22 changer transitions 0/355 dead transitions. [2021-12-17 22:40:13,821 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 355 transitions, 2349 flow [2021-12-17 22:40:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 22:40:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-12-17 22:40:13,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1573 transitions. [2021-12-17 22:40:13,824 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7756410256410257 [2021-12-17 22:40:13,824 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1573 transitions. [2021-12-17 22:40:13,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1573 transitions. [2021-12-17 22:40:13,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:40:13,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1573 transitions. [2021-12-17 22:40:13,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 131.08333333333334) internal successors, (1573), 12 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:13,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:13,832 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 169.0) internal successors, (2197), 13 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:13,832 INFO L186 Difference]: Start difference. First operand has 173 places, 166 transitions, 687 flow. Second operand 12 states and 1573 transitions. [2021-12-17 22:40:13,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 355 transitions, 2349 flow [2021-12-17 22:40:13,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 355 transitions, 2266 flow, removed 30 selfloop flow, removed 4 redundant places. [2021-12-17 22:40:13,950 INFO L242 Difference]: Finished difference. Result has 187 places, 180 transitions, 822 flow [2021-12-17 22:40:13,950 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=822, PETRI_PLACES=187, PETRI_TRANSITIONS=180} [2021-12-17 22:40:13,951 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 36 predicate places. [2021-12-17 22:40:13,951 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 180 transitions, 822 flow [2021-12-17 22:40:13,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 123.3) internal successors, (1233), 10 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:13,952 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:40:13,952 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:40:13,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 22:40:14,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 22:40:14,163 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-17 22:40:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:40:14,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1784526016, now seen corresponding path program 1 times [2021-12-17 22:40:14,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:40:14,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594829490] [2021-12-17 22:40:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:40:14,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:40:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:40:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:40:14,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:40:14,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594829490] [2021-12-17 22:40:14,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594829490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 22:40:14,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 22:40:14,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 22:40:14,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756485211] [2021-12-17 22:40:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 22:40:14,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 22:40:14,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:40:14,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 22:40:14,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 22:40:14,293 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 169 [2021-12-17 22:40:14,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 180 transitions, 822 flow. Second operand has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:14,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:40:14,294 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 169 [2021-12-17 22:40:14,294 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-17 22:40:22,367 INFO L129 PetriNetUnfolder]: 59371/90946 cut-off events. [2021-12-17 22:40:22,367 INFO L130 PetriNetUnfolder]: For 234780/240869 co-relation queries the response was YES. [2021-12-17 22:40:23,027 INFO L84 FinitePrefix]: Finished finitePrefix Result has 298916 conditions, 90946 events. 59371/90946 cut-off events. For 234780/240869 co-relation queries the response was YES. Maximal size of possible extension queue 4670. Compared 768802 event pairs, 9378 based on Foata normal form. 3417/81692 useless extension candidates. Maximal degree in co-relation 298890. Up to 34175 conditions per place. [2021-12-17 22:40:23,658 INFO L132 encePairwiseOnDemand]: 156/169 looper letters, 147 selfloop transitions, 18 changer transitions 0/275 dead transitions. [2021-12-17 22:40:23,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 275 transitions, 1756 flow [2021-12-17 22:40:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 22:40:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-12-17 22:40:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 927 transitions. [2021-12-17 22:40:23,661 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7836010143702451 [2021-12-17 22:40:23,661 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 927 transitions. [2021-12-17 22:40:23,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 927 transitions. [2021-12-17 22:40:23,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-17 22:40:23,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 927 transitions. [2021-12-17 22:40:23,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.42857142857142) internal successors, (927), 7 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:23,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:23,665 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:23,665 INFO L186 Difference]: Start difference. First operand has 187 places, 180 transitions, 822 flow. Second operand 7 states and 927 transitions. [2021-12-17 22:40:23,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 275 transitions, 1756 flow [2021-12-17 22:40:24,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 275 transitions, 1750 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-12-17 22:40:24,774 INFO L242 Difference]: Finished difference. Result has 193 places, 187 transitions, 934 flow [2021-12-17 22:40:24,774 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=169, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=934, PETRI_PLACES=193, PETRI_TRANSITIONS=187} [2021-12-17 22:40:24,775 INFO L334 CegarLoopForPetriNet]: 151 programPoint places, 42 predicate places. [2021-12-17 22:40:24,775 INFO L470 AbstractCegarLoop]: Abstraction has has 193 places, 187 transitions, 934 flow [2021-12-17 22:40:24,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 123.66666666666667) internal successors, (742), 6 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:24,776 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-17 22:40:24,776 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 22:40:24,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 22:40:24,776 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 3 more)] === [2021-12-17 22:40:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 22:40:24,777 INFO L85 PathProgramCache]: Analyzing trace with hash 883055160, now seen corresponding path program 1 times [2021-12-17 22:40:24,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 22:40:24,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466532247] [2021-12-17 22:40:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:40:24,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 22:40:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:40:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:40:24,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 22:40:24,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466532247] [2021-12-17 22:40:24,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466532247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 22:40:24,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880374848] [2021-12-17 22:40:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 22:40:24,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 22:40:24,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 22:40:25,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 22:40:25,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 22:40:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 22:40:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 22:40:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 22:40:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:40:25,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 22:40:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 22:40:25,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880374848] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 22:40:25,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 22:40:25,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2021-12-17 22:40:25,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243511738] [2021-12-17 22:40:25,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 22:40:25,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 22:40:25,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 22:40:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 22:40:25,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-12-17 22:40:25,795 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 169 [2021-12-17 22:40:25,796 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 187 transitions, 934 flow. Second operand has 14 states, 14 states have (on average 112.07142857142857) internal successors, (1569), 14 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 22:40:25,796 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-17 22:40:25,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 169 [2021-12-17 22:40:25,797 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand