./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-deagle/floating_read-25.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/pthread-deagle/floating_read-25.i -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 778e3ae04d32637f959b85d1a08971a3e61432e093e04b2798423806241a3f5a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:51:51,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:51:51,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:51:51,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:51:51,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:51:51,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:51:51,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:51:51,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:51:51,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:51:51,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:51:51,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:51:51,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:51:51,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:51:51,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:51:51,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:51:51,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:51:51,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:51:51,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:51:51,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:51:51,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:51:51,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:51:51,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:51:51,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:51:51,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:51:51,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:51:51,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:51:51,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:51:51,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:51:51,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:51:51,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:51:51,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:51:51,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:51:51,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:51:51,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:51:51,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:51:51,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:51:51,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:51:51,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:51:51,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:51:51,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:51:51,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:51:51,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:51:51,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:51:51,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:51:51,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:51:51,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:51:51,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:51:51,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:51:51,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:51:51,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:51:51,208 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:51:51,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:51:51,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:51:51,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:51:51,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:51:51,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:51:51,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:51:51,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:51:51,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:51:51,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:51:51,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:51:51,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:51:51,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:51:51,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:51:51,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:51:51,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:51:51,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:51:51,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:51:51,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:51:51,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:51:51,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:51:51,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:51:51,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:51:51,212 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:51:51,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:51:51,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:51:51,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 778e3ae04d32637f959b85d1a08971a3e61432e093e04b2798423806241a3f5a [2021-12-22 13:51:51,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:51:51,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:51:51,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:51:51,380 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:51:51,380 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:51:51,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-deagle/floating_read-25.i [2021-12-22 13:51:51,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29402962/85325dc5e18548079083f4f4fb4205fb/FLAG7640a8507 [2021-12-22 13:51:51,801 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:51:51,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-deagle/floating_read-25.i [2021-12-22 13:51:51,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29402962/85325dc5e18548079083f4f4fb4205fb/FLAG7640a8507 [2021-12-22 13:51:52,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29402962/85325dc5e18548079083f4f4fb4205fb [2021-12-22 13:51:52,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:51:52,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:51:52,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:51:52,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:51:52,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:51:52,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2588d79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52, skipping insertion in model container [2021-12-22 13:51:52,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:51:52,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:51:52,430 WARN L1533 CHandler]: Possible shadowing of function thread [2021-12-22 13:51:52,445 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/pthread-deagle/floating_read-25.i[31197,31210] [2021-12-22 13:51:52,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:51:52,457 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:51:52,484 WARN L1533 CHandler]: Possible shadowing of function thread [2021-12-22 13:51:52,489 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/pthread-deagle/floating_read-25.i[31197,31210] [2021-12-22 13:51:52,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:51:52,519 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:51:52,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52 WrapperNode [2021-12-22 13:51:52,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:51:52,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:51:52,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:51:52,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:51:52,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,551 INFO L137 Inliner]: procedures = 162, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2021-12-22 13:51:52,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:51:52,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:51:52,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:51:52,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:51:52,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:51:52,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:51:52,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:51:52,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:51:52,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (1/1) ... [2021-12-22 13:51:52,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:51:52,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:52,593 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) [2021-12-22 13:51:52,597 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 [2021-12-22 13:51:52,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 13:51:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 13:51:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-12-22 13:51:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:51:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 13:51:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 13:51:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:51:52,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-12-22 13:51:52,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-12-22 13:51:52,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-12-22 13:51:52,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:51:52,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:51:52,619 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-12-22 13:51:52,695 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:51:52,696 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:51:52,843 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:51:52,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:51:52,848 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:51:52,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:51:52 BoogieIcfgContainer [2021-12-22 13:51:52,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:51:52,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:51:52,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:51:52,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:51:52,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:51:52" (1/3) ... [2021-12-22 13:51:52,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7160974a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:51:52, skipping insertion in model container [2021-12-22 13:51:52,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:51:52" (2/3) ... [2021-12-22 13:51:52,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7160974a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:51:52, skipping insertion in model container [2021-12-22 13:51:52,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:51:52" (3/3) ... [2021-12-22 13:51:52,864 INFO L111 eAbstractionObserver]: Analyzing ICFG floating_read-25.i [2021-12-22 13:51:52,868 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-12-22 13:51:52,868 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:51:52,868 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 13:51:52,868 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-12-22 13:51:52,886 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,887 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,887 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,887 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,887 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,887 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,888 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,888 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,888 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,888 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,888 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,889 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,889 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,889 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,889 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,889 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,889 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,890 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,890 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,890 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,892 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,892 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,893 WARN L322 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,893 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,893 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:52,895 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-12-22 13:51:52,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:51:52,932 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 [2021-12-22 13:51:52,932 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:51:52,939 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 58 places, 59 transitions, 126 flow [2021-12-22 13:51:52,963 INFO L129 PetriNetUnfolder]: 7/81 cut-off events. [2021-12-22 13:51:52,964 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-22 13:51:52,966 INFO L84 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 81 events. 7/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 104 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 42. Up to 4 conditions per place. [2021-12-22 13:51:52,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 59 transitions, 126 flow [2021-12-22 13:51:52,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 40 transitions, 85 flow [2021-12-22 13:51:52,973 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-12-22 13:51:52,976 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:51:52,976 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:52,977 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] [2021-12-22 13:51:52,977 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:52,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:52,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1781753840, now seen corresponding path program 1 times [2021-12-22 13:51:52,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:52,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772424339] [2021-12-22 13:51:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:52,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:53,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772424339] [2021-12-22 13:51:53,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772424339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:53,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:53,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:51:53,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602421869] [2021-12-22 13:51:53,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:53,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:51:53,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:53,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:51:53,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:51:53,212 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 59 [2021-12-22 13:51:53,215 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 85 flow. Second operand has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 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) [2021-12-22 13:51:53,215 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:53,215 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 59 [2021-12-22 13:51:53,216 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:53,243 INFO L129 PetriNetUnfolder]: 0/46 cut-off events. [2021-12-22 13:51:53,244 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-12-22 13:51:53,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 46 events. 0/46 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-12-22 13:51:53,245 INFO L132 encePairwiseOnDemand]: 58/59 looper letters, 1 selfloop transitions, 0 changer transitions 0/39 dead transitions. [2021-12-22 13:51:53,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 85 flow [2021-12-22 13:51:53,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:51:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:51:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 108 transitions. [2021-12-22 13:51:53,256 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9152542372881356 [2021-12-22 13:51:53,257 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 108 transitions. [2021-12-22 13:51:53,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 108 transitions. [2021-12-22 13:51:53,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:53,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 108 transitions. [2021-12-22 13:51:53,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 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) [2021-12-22 13:51:53,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2021-12-22 13:51:53,272 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 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) [2021-12-22 13:51:53,274 INFO L186 Difference]: Start difference. First operand has 42 places, 40 transitions, 85 flow. Second operand 2 states and 108 transitions. [2021-12-22 13:51:53,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 85 flow [2021-12-22 13:51:53,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:53,282 INFO L242 Difference]: Finished difference. Result has 43 places, 39 transitions, 83 flow [2021-12-22 13:51:53,284 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=83, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2021-12-22 13:51:53,287 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2021-12-22 13:51:53,288 INFO L470 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 83 flow [2021-12-22 13:51:53,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 53.5) internal successors, (107), 2 states have internal predecessors, (107), 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) [2021-12-22 13:51:53,289 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:53,289 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] [2021-12-22 13:51:53,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:51:53,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:53,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1781754801, now seen corresponding path program 1 times [2021-12-22 13:51:53,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:53,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17107916] [2021-12-22 13:51:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:53,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:53,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17107916] [2021-12-22 13:51:53,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17107916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:53,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:53,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:53,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6942837] [2021-12-22 13:51:53,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:53,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:53,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:53,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:53,369 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 59 [2021-12-22 13:51:53,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-12-22 13:51:53,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:53,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 59 [2021-12-22 13:51:53,370 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:53,399 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-12-22 13:51:53,399 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:51:53,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 43 events. 0/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-12-22 13:51:53,400 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 8 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2021-12-22 13:51:53,400 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 107 flow [2021-12-22 13:51:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:53,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 149 transitions. [2021-12-22 13:51:53,406 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8418079096045198 [2021-12-22 13:51:53,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 149 transitions. [2021-12-22 13:51:53,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 149 transitions. [2021-12-22 13:51:53,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:53,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 149 transitions. [2021-12-22 13:51:53,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:53,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-12-22 13:51:53,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-12-22 13:51:53,412 INFO L186 Difference]: Start difference. First operand has 43 places, 39 transitions, 83 flow. Second operand 3 states and 149 transitions. [2021-12-22 13:51:53,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 107 flow [2021-12-22 13:51:53,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:53,415 INFO L242 Difference]: Finished difference. Result has 46 places, 39 transitions, 91 flow [2021-12-22 13:51:53,416 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2021-12-22 13:51:53,416 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2021-12-22 13:51:53,417 INFO L470 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 91 flow [2021-12-22 13:51:53,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 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) [2021-12-22 13:51:53,417 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:53,417 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] [2021-12-22 13:51:53,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:51:53,418 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:53,419 INFO L85 PathProgramCache]: Analyzing trace with hash -315270955, now seen corresponding path program 1 times [2021-12-22 13:51:53,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:53,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582212758] [2021-12-22 13:51:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:53,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:53,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:53,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582212758] [2021-12-22 13:51:53,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582212758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:53,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:53,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:53,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271526578] [2021-12-22 13:51:53,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:53,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:53,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:53,493 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 59 [2021-12-22 13:51:53,493 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2021-12-22 13:51:53,493 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:53,494 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 59 [2021-12-22 13:51:53,494 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:53,510 INFO L129 PetriNetUnfolder]: 0/43 cut-off events. [2021-12-22 13:51:53,511 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:51:53,511 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 43 events. 0/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 15 event pairs, 0 based on Foata normal form. 1/44 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-12-22 13:51:53,511 INFO L132 encePairwiseOnDemand]: 56/59 looper letters, 3 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2021-12-22 13:51:53,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 39 transitions, 101 flow [2021-12-22 13:51:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2021-12-22 13:51:53,514 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.847457627118644 [2021-12-22 13:51:53,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2021-12-22 13:51:53,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2021-12-22 13:51:53,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:53,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2021-12-22 13:51:53,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2021-12-22 13:51:53,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-12-22 13:51:53,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 59.0) internal successors, (236), 4 states have internal predecessors, (236), 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) [2021-12-22 13:51:53,517 INFO L186 Difference]: Start difference. First operand has 46 places, 39 transitions, 91 flow. Second operand 3 states and 150 transitions. [2021-12-22 13:51:53,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 39 transitions, 101 flow [2021-12-22 13:51:53,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 97 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-12-22 13:51:53,518 INFO L242 Difference]: Finished difference. Result has 47 places, 39 transitions, 95 flow [2021-12-22 13:51:53,518 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2021-12-22 13:51:53,520 INFO L334 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2021-12-22 13:51:53,520 INFO L470 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 95 flow [2021-12-22 13:51:53,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 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) [2021-12-22 13:51:53,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:53,521 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:53,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:51:53,521 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:53,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1968634815, now seen corresponding path program 1 times [2021-12-22 13:51:53,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:53,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345823419] [2021-12-22 13:51:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:53,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:51:53,555 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:51:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:51:53,577 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:51:53,577 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:51:53,578 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:51:53,582 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:51:53,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:51:53,585 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-22 13:51:53,587 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:51:53,587 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-12-22 13:51:53,599 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,600 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,600 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,600 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,602 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,602 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,603 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,603 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,603 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,603 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,603 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,603 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,603 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,604 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,604 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,604 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,604 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,604 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,604 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,605 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,605 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,605 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,605 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,605 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,606 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,606 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,606 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,606 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,606 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,607 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,607 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,607 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,607 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,607 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,607 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,608 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,608 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,608 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,608 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,608 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,610 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,610 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,611 WARN L322 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,611 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,611 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,612 WARN L322 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,612 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:53,616 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-12-22 13:51:53,618 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:51:53,623 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 [2021-12-22 13:51:53,623 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:51:53,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 66 transitions, 150 flow [2021-12-22 13:51:53,663 INFO L129 PetriNetUnfolder]: 13/135 cut-off events. [2021-12-22 13:51:53,663 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-22 13:51:53,665 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 135 events. 13/135 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 236 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2021-12-22 13:51:53,665 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 66 transitions, 150 flow [2021-12-22 13:51:53,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 46 transitions, 104 flow [2021-12-22 13:51:53,670 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-22 13:51:53,670 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:51:53,670 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:53,671 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] [2021-12-22 13:51:53,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 775346483, now seen corresponding path program 1 times [2021-12-22 13:51:53,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638283299] [2021-12-22 13:51:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:53,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:53,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:53,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638283299] [2021-12-22 13:51:53,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638283299] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:53,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:53,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:53,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105770965] [2021-12-22 13:51:53,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:53,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:53,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:53,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:53,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:53,696 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 66 [2021-12-22 13:51:53,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:53,697 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:53,697 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 66 [2021-12-22 13:51:53,697 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:53,716 INFO L129 PetriNetUnfolder]: 0/61 cut-off events. [2021-12-22 13:51:53,718 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:51:53,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 61 events. 0/61 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 0. Up to 12 conditions per place. [2021-12-22 13:51:53,719 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 11 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2021-12-22 13:51:53,719 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 136 flow [2021-12-22 13:51:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2021-12-22 13:51:53,720 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8535353535353535 [2021-12-22 13:51:53,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2021-12-22 13:51:53,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2021-12-22 13:51:53,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:53,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2021-12-22 13:51:53,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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) [2021-12-22 13:51:53,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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) [2021-12-22 13:51:53,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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) [2021-12-22 13:51:53,722 INFO L186 Difference]: Start difference. First operand has 50 places, 46 transitions, 104 flow. Second operand 3 states and 169 transitions. [2021-12-22 13:51:53,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 136 flow [2021-12-22 13:51:53,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 49 transitions, 134 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:53,724 INFO L242 Difference]: Finished difference. Result has 53 places, 46 transitions, 112 flow [2021-12-22 13:51:53,724 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2021-12-22 13:51:53,725 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 3 predicate places. [2021-12-22 13:51:53,725 INFO L470 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 112 flow [2021-12-22 13:51:53,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:53,725 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:53,726 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] [2021-12-22 13:51:53,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:51:53,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:53,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1083506660, now seen corresponding path program 1 times [2021-12-22 13:51:53,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:53,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274032016] [2021-12-22 13:51:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:53,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:53,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:53,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274032016] [2021-12-22 13:51:53,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274032016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:53,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:53,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:53,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081197775] [2021-12-22 13:51:53,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:53,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:53,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:53,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:53,761 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 66 [2021-12-22 13:51:53,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:53,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:53,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 66 [2021-12-22 13:51:53,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:53,775 INFO L129 PetriNetUnfolder]: 4/87 cut-off events. [2021-12-22 13:51:53,775 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-22 13:51:53,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 87 events. 4/87 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 1 based on Foata normal form. 2/88 useless extension candidates. Maximal degree in co-relation 84. Up to 13 conditions per place. [2021-12-22 13:51:53,776 INFO L132 encePairwiseOnDemand]: 62/66 looper letters, 7 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2021-12-22 13:51:53,776 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 143 flow [2021-12-22 13:51:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2021-12-22 13:51:53,777 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8434343434343434 [2021-12-22 13:51:53,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2021-12-22 13:51:53,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2021-12-22 13:51:53,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:53,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2021-12-22 13:51:53,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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) [2021-12-22 13:51:53,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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) [2021-12-22 13:51:53,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 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) [2021-12-22 13:51:53,779 INFO L186 Difference]: Start difference. First operand has 53 places, 46 transitions, 112 flow. Second operand 3 states and 167 transitions. [2021-12-22 13:51:53,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 143 flow [2021-12-22 13:51:53,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:51:53,781 INFO L242 Difference]: Finished difference. Result has 55 places, 48 transitions, 129 flow [2021-12-22 13:51:53,782 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2021-12-22 13:51:53,784 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2021-12-22 13:51:53,785 INFO L470 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 129 flow [2021-12-22 13:51:53,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:53,785 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:53,785 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] [2021-12-22 13:51:53,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:51:53,786 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:53,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2017126046, now seen corresponding path program 1 times [2021-12-22 13:51:53,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:53,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858230560] [2021-12-22 13:51:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:53,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:53,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:53,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858230560] [2021-12-22 13:51:53,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858230560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:53,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670101866] [2021-12-22 13:51:53,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:53,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:53,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:53,842 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) [2021-12-22 13:51:53,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:51:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:51:53,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:53,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:54,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670101866] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:54,040 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:54,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:51:54,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167754322] [2021-12-22 13:51:54,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:54,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:51:54,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:51:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:51:54,044 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 66 [2021-12-22 13:51:54,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 129 flow. Second operand has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 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) [2021-12-22 13:51:54,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:54,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 66 [2021-12-22 13:51:54,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:54,122 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-12-22 13:51:54,122 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-12-22 13:51:54,123 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 59 events. 1/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 32 event pairs, 0 based on Foata normal form. 2/61 useless extension candidates. Maximal degree in co-relation 37. Up to 5 conditions per place. [2021-12-22 13:51:54,123 INFO L132 encePairwiseOnDemand]: 61/66 looper letters, 9 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2021-12-22 13:51:54,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 163 flow [2021-12-22 13:51:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:51:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:51:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2021-12-22 13:51:54,125 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7878787878787878 [2021-12-22 13:51:54,125 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 468 transitions. [2021-12-22 13:51:54,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 468 transitions. [2021-12-22 13:51:54,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:54,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 468 transitions. [2021-12-22 13:51:54,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:51:54,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 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) [2021-12-22 13:51:54,147 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 66.0) internal successors, (660), 10 states have internal predecessors, (660), 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) [2021-12-22 13:51:54,147 INFO L186 Difference]: Start difference. First operand has 55 places, 48 transitions, 129 flow. Second operand 9 states and 468 transitions. [2021-12-22 13:51:54,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 163 flow [2021-12-22 13:51:54,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:51:54,148 INFO L242 Difference]: Finished difference. Result has 59 places, 47 transitions, 134 flow [2021-12-22 13:51:54,148 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2021-12-22 13:51:54,149 INFO L334 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2021-12-22 13:51:54,149 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 134 flow [2021-12-22 13:51:54,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 52.3) internal successors, (523), 10 states have internal predecessors, (523), 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) [2021-12-22 13:51:54,149 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:54,150 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:54,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:54,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:54,356 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:54,356 INFO L85 PathProgramCache]: Analyzing trace with hash 286308789, now seen corresponding path program 1 times [2021-12-22 13:51:54,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:54,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272243359] [2021-12-22 13:51:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:54,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:51:54,383 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:51:54,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:51:54,401 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:51:54,401 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:51:54,401 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:51:54,402 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:51:54,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:51:54,402 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-22 13:51:54,403 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:51:54,403 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-12-22 13:51:54,412 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,413 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,413 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,418 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,418 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,418 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,418 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,418 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,419 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,419 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,419 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,419 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,419 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,419 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,419 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,419 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,420 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,420 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,420 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,420 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,420 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,420 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,420 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,421 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,421 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,421 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,421 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,421 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,421 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,421 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,421 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,422 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,422 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,422 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,422 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,422 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,422 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,423 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,423 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,423 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,423 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,423 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,423 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,423 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,423 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,424 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,424 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,424 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,424 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,424 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,424 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,425 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,425 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,425 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,425 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,425 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,425 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,425 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,425 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,426 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,426 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,426 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,426 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,426 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,426 WARN L322 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,427 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,427 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,427 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,427 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,427 WARN L322 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,429 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,429 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,429 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,429 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,429 WARN L322 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:54,433 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-12-22 13:51:54,435 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:51:54,441 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 [2021-12-22 13:51:54,442 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:51:54,443 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 176 flow [2021-12-22 13:51:54,468 INFO L129 PetriNetUnfolder]: 24/222 cut-off events. [2021-12-22 13:51:54,468 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-12-22 13:51:54,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 222 events. 24/222 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 498 event pairs, 1 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 143. Up to 16 conditions per place. [2021-12-22 13:51:54,469 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 73 transitions, 176 flow [2021-12-22 13:51:54,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 52 transitions, 125 flow [2021-12-22 13:51:54,472 INFO L129 PetriNetUnfolder]: 1/25 cut-off events. [2021-12-22 13:51:54,473 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:51:54,473 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:54,473 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] [2021-12-22 13:51:54,474 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:54,474 INFO L85 PathProgramCache]: Analyzing trace with hash 898626907, now seen corresponding path program 1 times [2021-12-22 13:51:54,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:54,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810852964] [2021-12-22 13:51:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:54,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:54,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:54,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810852964] [2021-12-22 13:51:54,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810852964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:54,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:54,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:51:54,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502045346] [2021-12-22 13:51:54,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:54,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:51:54,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:54,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:51:54,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:51:54,500 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 73 [2021-12-22 13:51:54,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 125 flow. Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 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) [2021-12-22 13:51:54,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:54,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 73 [2021-12-22 13:51:54,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:54,512 INFO L129 PetriNetUnfolder]: 0/82 cut-off events. [2021-12-22 13:51:54,512 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-12-22 13:51:54,513 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 82 events. 0/82 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 4/82 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-12-22 13:51:54,513 INFO L132 encePairwiseOnDemand]: 72/73 looper letters, 3 selfloop transitions, 0 changer transitions 0/51 dead transitions. [2021-12-22 13:51:54,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 129 flow [2021-12-22 13:51:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:51:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:51:54,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 130 transitions. [2021-12-22 13:51:54,514 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8904109589041096 [2021-12-22 13:51:54,514 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 130 transitions. [2021-12-22 13:51:54,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 130 transitions. [2021-12-22 13:51:54,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:54,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 130 transitions. [2021-12-22 13:51:54,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 65.0) internal successors, (130), 2 states have internal predecessors, (130), 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) [2021-12-22 13:51:54,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2021-12-22 13:51:54,515 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 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) [2021-12-22 13:51:54,515 INFO L186 Difference]: Start difference. First operand has 58 places, 52 transitions, 125 flow. Second operand 2 states and 130 transitions. [2021-12-22 13:51:54,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 129 flow [2021-12-22 13:51:54,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 51 transitions, 123 flow, removed 3 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:54,518 INFO L242 Difference]: Finished difference. Result has 59 places, 51 transitions, 117 flow [2021-12-22 13:51:54,519 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=117, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2021-12-22 13:51:54,520 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2021-12-22 13:51:54,520 INFO L470 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 117 flow [2021-12-22 13:51:54,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 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) [2021-12-22 13:51:54,520 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:54,520 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] [2021-12-22 13:51:54,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:51:54,521 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash 898627868, now seen corresponding path program 1 times [2021-12-22 13:51:54,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:54,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741069635] [2021-12-22 13:51:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:54,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:54,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:54,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741069635] [2021-12-22 13:51:54,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741069635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:54,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:54,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:54,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250295092] [2021-12-22 13:51:54,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:54,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:54,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:54,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:54,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:54,547 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2021-12-22 13:51:54,548 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2021-12-22 13:51:54,548 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:54,548 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2021-12-22 13:51:54,548 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:54,571 INFO L129 PetriNetUnfolder]: 0/79 cut-off events. [2021-12-22 13:51:54,571 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-12-22 13:51:54,572 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 79 events. 0/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 51 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 0. Up to 18 conditions per place. [2021-12-22 13:51:54,572 INFO L132 encePairwiseOnDemand]: 70/73 looper letters, 12 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2021-12-22 13:51:54,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 153 flow [2021-12-22 13:51:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2021-12-22 13:51:54,573 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2021-12-22 13:51:54,573 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2021-12-22 13:51:54,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2021-12-22 13:51:54,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:54,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2021-12-22 13:51:54,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-12-22 13:51:54,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-12-22 13:51:54,575 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-12-22 13:51:54,575 INFO L186 Difference]: Start difference. First operand has 59 places, 51 transitions, 117 flow. Second operand 3 states and 183 transitions. [2021-12-22 13:51:54,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 153 flow [2021-12-22 13:51:54,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:54,576 INFO L242 Difference]: Finished difference. Result has 62 places, 52 transitions, 129 flow [2021-12-22 13:51:54,576 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2021-12-22 13:51:54,577 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2021-12-22 13:51:54,577 INFO L470 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 129 flow [2021-12-22 13:51:54,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 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) [2021-12-22 13:51:54,577 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:54,577 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] [2021-12-22 13:51:54,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:51:54,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:54,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1823512938, now seen corresponding path program 1 times [2021-12-22 13:51:54,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:54,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644939163] [2021-12-22 13:51:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:54,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:54,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:54,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644939163] [2021-12-22 13:51:54,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644939163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:54,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:54,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:54,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097434582] [2021-12-22 13:51:54,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:54,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:54,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:54,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:54,598 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 73 [2021-12-22 13:51:54,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-12-22 13:51:54,598 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:54,598 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 73 [2021-12-22 13:51:54,598 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:54,620 INFO L129 PetriNetUnfolder]: 21/177 cut-off events. [2021-12-22 13:51:54,620 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-12-22 13:51:54,621 INFO L84 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 177 events. 21/177 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 569 event pairs, 8 based on Foata normal form. 3/175 useless extension candidates. Maximal degree in co-relation 262. Up to 44 conditions per place. [2021-12-22 13:51:54,622 INFO L132 encePairwiseOnDemand]: 68/73 looper letters, 10 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2021-12-22 13:51:54,622 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 57 transitions, 177 flow [2021-12-22 13:51:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:54,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2021-12-22 13:51:54,623 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8356164383561644 [2021-12-22 13:51:54,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2021-12-22 13:51:54,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2021-12-22 13:51:54,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:54,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2021-12-22 13:51:54,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 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) [2021-12-22 13:51:54,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-12-22 13:51:54,624 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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) [2021-12-22 13:51:54,624 INFO L186 Difference]: Start difference. First operand has 62 places, 52 transitions, 129 flow. Second operand 3 states and 183 transitions. [2021-12-22 13:51:54,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 57 transitions, 177 flow [2021-12-22 13:51:54,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:51:54,626 INFO L242 Difference]: Finished difference. Result has 64 places, 55 transitions, 153 flow [2021-12-22 13:51:54,626 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2021-12-22 13:51:54,626 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2021-12-22 13:51:54,627 INFO L470 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 153 flow [2021-12-22 13:51:54,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2021-12-22 13:51:54,627 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:54,627 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] [2021-12-22 13:51:54,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:51:54,627 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1587743943, now seen corresponding path program 1 times [2021-12-22 13:51:54,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:54,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276682197] [2021-12-22 13:51:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:54,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:54,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:54,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276682197] [2021-12-22 13:51:54,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276682197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:54,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098966385] [2021-12-22 13:51:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:54,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:54,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:54,672 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) [2021-12-22 13:51:54,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:51:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:54,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:51:54,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:54,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:54,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098966385] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:54,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:54,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:51:54,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023332445] [2021-12-22 13:51:54,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:54,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:51:54,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:54,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:51:54,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:51:54,860 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 73 [2021-12-22 13:51:54,861 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 153 flow. Second operand has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 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) [2021-12-22 13:51:54,861 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:54,861 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 73 [2021-12-22 13:51:54,861 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:54,926 INFO L129 PetriNetUnfolder]: 14/115 cut-off events. [2021-12-22 13:51:54,927 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:51:54,928 INFO L84 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 115 events. 14/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 231 event pairs, 6 based on Foata normal form. 2/112 useless extension candidates. Maximal degree in co-relation 184. Up to 29 conditions per place. [2021-12-22 13:51:54,929 INFO L132 encePairwiseOnDemand]: 67/73 looper letters, 13 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2021-12-22 13:51:54,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 219 flow [2021-12-22 13:51:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:51:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:51:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 519 transitions. [2021-12-22 13:51:54,931 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7899543378995434 [2021-12-22 13:51:54,931 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 519 transitions. [2021-12-22 13:51:54,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 519 transitions. [2021-12-22 13:51:54,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:54,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 519 transitions. [2021-12-22 13:51:54,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.666666666666664) internal successors, (519), 9 states have internal predecessors, (519), 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) [2021-12-22 13:51:54,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 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) [2021-12-22 13:51:54,934 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 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) [2021-12-22 13:51:54,934 INFO L186 Difference]: Start difference. First operand has 64 places, 55 transitions, 153 flow. Second operand 9 states and 519 transitions. [2021-12-22 13:51:54,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 219 flow [2021-12-22 13:51:54,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:51:54,935 INFO L242 Difference]: Finished difference. Result has 74 places, 61 transitions, 199 flow [2021-12-22 13:51:54,936 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=199, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2021-12-22 13:51:54,937 INFO L334 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2021-12-22 13:51:54,937 INFO L470 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 199 flow [2021-12-22 13:51:54,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 57.3) internal successors, (573), 10 states have internal predecessors, (573), 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) [2021-12-22 13:51:54,937 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:54,937 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:54,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:55,151 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,SelfDestructingSolverStorable11 [2021-12-22 13:51:55,151 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:55,152 INFO L85 PathProgramCache]: Analyzing trace with hash 176735389, now seen corresponding path program 1 times [2021-12-22 13:51:55,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:55,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780081354] [2021-12-22 13:51:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:55,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:51:55,166 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:51:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:51:55,185 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:51:55,186 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:51:55,186 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:51:55,186 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:51:55,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:51:55,186 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-22 13:51:55,187 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:51:55,187 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-12-22 13:51:55,193 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,193 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,194 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,195 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,196 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,197 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,197 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,197 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,197 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,197 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,197 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,197 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,197 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,198 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,198 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,198 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,198 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,198 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,198 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,198 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,199 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,200 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,201 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,202 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,203 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,203 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,203 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,203 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,203 WARN L322 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,204 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,204 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,204 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,204 WARN L322 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,204 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,204 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,204 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,204 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,205 WARN L322 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,205 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,205 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,205 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,205 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,205 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,205 WARN L322 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:51:55,208 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-12-22 13:51:55,209 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:51:55,209 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 [2021-12-22 13:51:55,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:51:55,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 80 transitions, 204 flow [2021-12-22 13:51:55,234 INFO L129 PetriNetUnfolder]: 47/377 cut-off events. [2021-12-22 13:51:55,234 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-12-22 13:51:55,234 INFO L84 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 377 events. 47/377 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1165 event pairs, 6 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 242. Up to 32 conditions per place. [2021-12-22 13:51:55,235 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 80 transitions, 204 flow [2021-12-22 13:51:55,235 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 58 transitions, 148 flow [2021-12-22 13:51:55,236 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-22 13:51:55,237 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:51:55,237 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:55,237 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] [2021-12-22 13:51:55,237 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:55,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2143368340, now seen corresponding path program 1 times [2021-12-22 13:51:55,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:55,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163196505] [2021-12-22 13:51:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:55,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:55,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:55,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163196505] [2021-12-22 13:51:55,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163196505] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:55,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:55,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:55,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270648151] [2021-12-22 13:51:55,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:55,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:55,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:55,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:55,261 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 80 [2021-12-22 13:51:55,262 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2021-12-22 13:51:55,262 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:55,262 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 80 [2021-12-22 13:51:55,262 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:55,282 INFO L129 PetriNetUnfolder]: 0/97 cut-off events. [2021-12-22 13:51:55,282 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-12-22 13:51:55,282 INFO L84 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 97 events. 0/97 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 0. Up to 24 conditions per place. [2021-12-22 13:51:55,283 INFO L132 encePairwiseOnDemand]: 76/80 looper letters, 13 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2021-12-22 13:51:55,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 184 flow [2021-12-22 13:51:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2021-12-22 13:51:55,284 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8375 [2021-12-22 13:51:55,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2021-12-22 13:51:55,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2021-12-22 13:51:55,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:55,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2021-12-22 13:51:55,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2021-12-22 13:51:55,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2021-12-22 13:51:55,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2021-12-22 13:51:55,286 INFO L186 Difference]: Start difference. First operand has 66 places, 58 transitions, 148 flow. Second operand 3 states and 201 transitions. [2021-12-22 13:51:55,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 184 flow [2021-12-22 13:51:55,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 172 flow, removed 6 selfloop flow, removed 0 redundant places. [2021-12-22 13:51:55,289 INFO L242 Difference]: Finished difference. Result has 69 places, 58 transitions, 146 flow [2021-12-22 13:51:55,289 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2021-12-22 13:51:55,290 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2021-12-22 13:51:55,290 INFO L470 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 146 flow [2021-12-22 13:51:55,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 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) [2021-12-22 13:51:55,290 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:55,291 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] [2021-12-22 13:51:55,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:51:55,291 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:55,291 INFO L85 PathProgramCache]: Analyzing trace with hash -184146753, now seen corresponding path program 1 times [2021-12-22 13:51:55,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:55,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116820276] [2021-12-22 13:51:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:55,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:51:55,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:55,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116820276] [2021-12-22 13:51:55,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116820276] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:51:55,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:51:55,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:51:55,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648592933] [2021-12-22 13:51:55,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:51:55,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:51:55,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:55,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:51:55,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:51:55,332 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2021-12-22 13:51:55,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2021-12-22 13:51:55,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:55,333 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2021-12-22 13:51:55,333 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:55,375 INFO L129 PetriNetUnfolder]: 73/359 cut-off events. [2021-12-22 13:51:55,375 INFO L130 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2021-12-22 13:51:55,376 INFO L84 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 359 events. 73/359 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1623 event pairs, 35 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 523. Up to 126 conditions per place. [2021-12-22 13:51:55,378 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 13 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2021-12-22 13:51:55,378 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 65 transitions, 211 flow [2021-12-22 13:51:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:51:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:51:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2021-12-22 13:51:55,379 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8291666666666667 [2021-12-22 13:51:55,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2021-12-22 13:51:55,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2021-12-22 13:51:55,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:55,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2021-12-22 13:51:55,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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) [2021-12-22 13:51:55,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2021-12-22 13:51:55,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 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) [2021-12-22 13:51:55,381 INFO L186 Difference]: Start difference. First operand has 69 places, 58 transitions, 146 flow. Second operand 3 states and 199 transitions. [2021-12-22 13:51:55,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 65 transitions, 211 flow [2021-12-22 13:51:55,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:51:55,383 INFO L242 Difference]: Finished difference. Result has 71 places, 62 transitions, 177 flow [2021-12-22 13:51:55,383 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=71, PETRI_TRANSITIONS=62} [2021-12-22 13:51:55,383 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2021-12-22 13:51:55,383 INFO L470 AbstractCegarLoop]: Abstraction has has 71 places, 62 transitions, 177 flow [2021-12-22 13:51:55,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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) [2021-12-22 13:51:55,384 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:55,384 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] [2021-12-22 13:51:55,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:51:55,384 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:55,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:55,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1187205763, now seen corresponding path program 1 times [2021-12-22 13:51:55,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:55,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295185198] [2021-12-22 13:51:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:55,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:55,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:55,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295185198] [2021-12-22 13:51:55,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295185198] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:55,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701389303] [2021-12-22 13:51:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:55,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:55,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:55,424 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) [2021-12-22 13:51:55,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:51:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:55,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:51:55,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:55,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:55,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701389303] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:55,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:55,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:51:55,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525109807] [2021-12-22 13:51:55,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:51:55,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:51:55,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:51:55,586 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 80 [2021-12-22 13:51:55,586 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 62 transitions, 177 flow. Second operand has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 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) [2021-12-22 13:51:55,586 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:55,587 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 80 [2021-12-22 13:51:55,587 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:55,650 INFO L129 PetriNetUnfolder]: 54/233 cut-off events. [2021-12-22 13:51:55,651 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-12-22 13:51:55,651 INFO L84 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 233 events. 54/233 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 820 event pairs, 28 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 324. Up to 92 conditions per place. [2021-12-22 13:51:55,652 INFO L132 encePairwiseOnDemand]: 74/80 looper letters, 14 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2021-12-22 13:51:55,652 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 72 transitions, 245 flow [2021-12-22 13:51:55,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:51:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:51:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 565 transitions. [2021-12-22 13:51:55,654 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2021-12-22 13:51:55,654 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 565 transitions. [2021-12-22 13:51:55,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 565 transitions. [2021-12-22 13:51:55,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:55,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 565 transitions. [2021-12-22 13:51:55,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 62.77777777777778) internal successors, (565), 9 states have internal predecessors, (565), 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) [2021-12-22 13:51:55,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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) [2021-12-22 13:51:55,657 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 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) [2021-12-22 13:51:55,657 INFO L186 Difference]: Start difference. First operand has 71 places, 62 transitions, 177 flow. Second operand 9 states and 565 transitions. [2021-12-22 13:51:55,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 72 transitions, 245 flow [2021-12-22 13:51:55,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:51:55,658 INFO L242 Difference]: Finished difference. Result has 81 places, 68 transitions, 222 flow [2021-12-22 13:51:55,659 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=222, PETRI_PLACES=81, PETRI_TRANSITIONS=68} [2021-12-22 13:51:55,659 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2021-12-22 13:51:55,659 INFO L470 AbstractCegarLoop]: Abstraction has has 81 places, 68 transitions, 222 flow [2021-12-22 13:51:55,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.3) internal successors, (623), 10 states have internal predecessors, (623), 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) [2021-12-22 13:51:55,660 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:55,660 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:55,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:55,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:55,875 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash -909312246, now seen corresponding path program 1 times [2021-12-22 13:51:55,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:55,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591814717] [2021-12-22 13:51:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:55,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:51:55,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:55,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591814717] [2021-12-22 13:51:55,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591814717] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:55,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425056637] [2021-12-22 13:51:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:55,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:55,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:55,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:55,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 13:51:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:51:55,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:51:56,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:51:56,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425056637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:56,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:56,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-22 13:51:56,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254622035] [2021-12-22 13:51:56,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:56,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 13:51:56,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:56,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 13:51:56,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:51:56,201 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 80 [2021-12-22 13:51:56,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 68 transitions, 222 flow. Second operand has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 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) [2021-12-22 13:51:56,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:56,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 80 [2021-12-22 13:51:56,202 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:56,564 INFO L129 PetriNetUnfolder]: 768/1925 cut-off events. [2021-12-22 13:51:56,564 INFO L130 PetriNetUnfolder]: For 1179/1187 co-relation queries the response was YES. [2021-12-22 13:51:56,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4594 conditions, 1925 events. 768/1925 cut-off events. For 1179/1187 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12692 event pairs, 54 based on Foata normal form. 13/1938 useless extension candidates. Maximal degree in co-relation 1672. Up to 663 conditions per place. [2021-12-22 13:51:56,578 INFO L132 encePairwiseOnDemand]: 68/80 looper letters, 70 selfloop transitions, 66 changer transitions 0/175 dead transitions. [2021-12-22 13:51:56,578 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 999 flow [2021-12-22 13:51:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:51:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:51:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1082 transitions. [2021-12-22 13:51:56,580 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7118421052631579 [2021-12-22 13:51:56,580 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1082 transitions. [2021-12-22 13:51:56,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1082 transitions. [2021-12-22 13:51:56,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:56,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1082 transitions. [2021-12-22 13:51:56,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.94736842105263) internal successors, (1082), 19 states have internal predecessors, (1082), 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) [2021-12-22 13:51:56,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 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) [2021-12-22 13:51:56,585 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 80.0) internal successors, (1600), 20 states have internal predecessors, (1600), 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) [2021-12-22 13:51:56,585 INFO L186 Difference]: Start difference. First operand has 81 places, 68 transitions, 222 flow. Second operand 19 states and 1082 transitions. [2021-12-22 13:51:56,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 999 flow [2021-12-22 13:51:56,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 175 transitions, 971 flow, removed 12 selfloop flow, removed 1 redundant places. [2021-12-22 13:51:56,590 INFO L242 Difference]: Finished difference. Result has 100 places, 121 transitions, 607 flow [2021-12-22 13:51:56,590 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=607, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2021-12-22 13:51:56,591 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 34 predicate places. [2021-12-22 13:51:56,591 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 607 flow [2021-12-22 13:51:56,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 53.6) internal successors, (804), 15 states have internal predecessors, (804), 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) [2021-12-22 13:51:56,591 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:56,591 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:56,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:56,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-22 13:51:56,809 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:56,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1362214409, now seen corresponding path program 1 times [2021-12-22 13:51:56,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:56,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905214993] [2021-12-22 13:51:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:56,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:51:56,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:56,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905214993] [2021-12-22 13:51:56,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905214993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:56,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148642056] [2021-12-22 13:51:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:56,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:56,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:56,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:56,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 13:51:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 13:51:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:51:57,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:51:57,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148642056] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:57,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:57,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-22 13:51:57,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124204745] [2021-12-22 13:51:57,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:57,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 13:51:57,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 13:51:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-22 13:51:57,165 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2021-12-22 13:51:57,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 607 flow. Second operand has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 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) [2021-12-22 13:51:57,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:57,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2021-12-22 13:51:57,166 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:51:58,041 INFO L129 PetriNetUnfolder]: 1764/4298 cut-off events. [2021-12-22 13:51:58,041 INFO L130 PetriNetUnfolder]: For 4575/4585 co-relation queries the response was YES. [2021-12-22 13:51:58,056 INFO L84 FinitePrefix]: Finished finitePrefix Result has 12409 conditions, 4298 events. 1764/4298 cut-off events. For 4575/4585 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 34284 event pairs, 65 based on Foata normal form. 28/4326 useless extension candidates. Maximal degree in co-relation 4818. Up to 1292 conditions per place. [2021-12-22 13:51:58,077 INFO L132 encePairwiseOnDemand]: 66/80 looper letters, 113 selfloop transitions, 180 changer transitions 0/337 dead transitions. [2021-12-22 13:51:58,077 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 337 transitions, 2519 flow [2021-12-22 13:51:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-22 13:51:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-12-22 13:51:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2224 transitions. [2021-12-22 13:51:58,081 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2021-12-22 13:51:58,081 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2224 transitions. [2021-12-22 13:51:58,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2224 transitions. [2021-12-22 13:51:58,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:51:58,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2224 transitions. [2021-12-22 13:51:58,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 54.24390243902439) internal successors, (2224), 41 states have internal predecessors, (2224), 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) [2021-12-22 13:51:58,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 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) [2021-12-22 13:51:58,090 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 80.0) internal successors, (3360), 42 states have internal predecessors, (3360), 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) [2021-12-22 13:51:58,091 INFO L186 Difference]: Start difference. First operand has 100 places, 121 transitions, 607 flow. Second operand 41 states and 2224 transitions. [2021-12-22 13:51:58,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 337 transitions, 2519 flow [2021-12-22 13:51:58,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 337 transitions, 2497 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-22 13:51:58,108 INFO L242 Difference]: Finished difference. Result has 140 places, 255 transitions, 1863 flow [2021-12-22 13:51:58,109 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1863, PETRI_PLACES=140, PETRI_TRANSITIONS=255} [2021-12-22 13:51:58,109 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 74 predicate places. [2021-12-22 13:51:58,109 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 255 transitions, 1863 flow [2021-12-22 13:51:58,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 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) [2021-12-22 13:51:58,110 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:51:58,110 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:51:58,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 13:51:58,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 13:51:58,328 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:51:58,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:51:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1109338339, now seen corresponding path program 1 times [2021-12-22 13:51:58,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:51:58,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607423080] [2021-12-22 13:51:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:58,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:51:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:58,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:51:58,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607423080] [2021-12-22 13:51:58,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607423080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:51:58,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860261874] [2021-12-22 13:51:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:51:58,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:51:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:51:58,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:51:58,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 13:51:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:51:58,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:51:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:51:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:58,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:51:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:51:58,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860261874] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:51:58,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:51:58,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2021-12-22 13:51:58,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564690159] [2021-12-22 13:51:58,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:51:58,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 13:51:58,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:51:58,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 13:51:58,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-12-22 13:51:58,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 80 [2021-12-22 13:51:58,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 255 transitions, 1863 flow. Second operand has 24 states, 24 states have (on average 52.75) internal successors, (1266), 24 states have internal predecessors, (1266), 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) [2021-12-22 13:51:58,769 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:51:58,769 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 80 [2021-12-22 13:51:58,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,199 INFO L129 PetriNetUnfolder]: 2710/6167 cut-off events. [2021-12-22 13:52:00,200 INFO L130 PetriNetUnfolder]: For 14796/14898 co-relation queries the response was YES. [2021-12-22 13:52:00,230 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20066 conditions, 6167 events. 2710/6167 cut-off events. For 14796/14898 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 49685 event pairs, 0 based on Foata normal form. 295/6461 useless extension candidates. Maximal degree in co-relation 9451. Up to 1549 conditions per place. [2021-12-22 13:52:00,265 INFO L132 encePairwiseOnDemand]: 67/80 looper letters, 380 selfloop transitions, 600 changer transitions 0/1041 dead transitions. [2021-12-22 13:52:00,265 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1041 transitions, 10637 flow [2021-12-22 13:52:00,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-12-22 13:52:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-12-22 13:52:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3228 transitions. [2021-12-22 13:52:00,271 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6838983050847458 [2021-12-22 13:52:00,271 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3228 transitions. [2021-12-22 13:52:00,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3228 transitions. [2021-12-22 13:52:00,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3228 transitions. [2021-12-22 13:52:00,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 54.71186440677966) internal successors, (3228), 59 states have internal predecessors, (3228), 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) [2021-12-22 13:52:00,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 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) [2021-12-22 13:52:00,285 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 80.0) internal successors, (4800), 60 states have internal predecessors, (4800), 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) [2021-12-22 13:52:00,285 INFO L186 Difference]: Start difference. First operand has 140 places, 255 transitions, 1863 flow. Second operand 59 states and 3228 transitions. [2021-12-22 13:52:00,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1041 transitions, 10637 flow [2021-12-22 13:52:00,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 1041 transitions, 10210 flow, removed 15 selfloop flow, removed 15 redundant places. [2021-12-22 13:52:00,355 INFO L242 Difference]: Finished difference. Result has 187 places, 737 transitions, 6892 flow [2021-12-22 13:52:00,356 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=6892, PETRI_PLACES=187, PETRI_TRANSITIONS=737} [2021-12-22 13:52:00,356 INFO L334 CegarLoopForPetriNet]: 66 programPoint places, 121 predicate places. [2021-12-22 13:52:00,357 INFO L470 AbstractCegarLoop]: Abstraction has has 187 places, 737 transitions, 6892 flow [2021-12-22 13:52:00,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 52.75) internal successors, (1266), 24 states have internal predecessors, (1266), 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) [2021-12-22 13:52:00,357 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,357 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:00,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 13:52:00,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:00,571 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1693116247, now seen corresponding path program 1 times [2021-12-22 13:52:00,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409234261] [2021-12-22 13:52:00,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:00,589 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:52:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:00,611 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:52:00,612 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:52:00,612 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:52:00,612 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:52:00,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:52:00,613 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:00,613 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:52:00,613 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-12-22 13:52:00,624 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,625 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,625 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,625 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,625 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,626 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,627 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,627 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,628 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,628 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,628 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,628 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,629 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,629 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,630 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,630 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,630 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,630 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,631 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,631 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,631 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,631 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,631 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,631 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,631 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,632 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,633 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,633 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,633 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,633 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,633 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,633 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,633 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,634 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,634 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,634 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,634 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,634 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,634 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,634 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,634 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,635 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,635 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,635 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,635 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,635 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,635 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,635 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,635 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,636 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,636 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,636 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,636 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,636 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,636 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,636 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,636 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,637 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,637 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,637 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,637 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,637 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,637 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,637 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,637 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,638 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,638 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,638 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,638 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,638 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,638 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,638 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,639 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,639 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,639 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,639 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,639 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,639 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,639 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,640 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,640 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,640 WARN L322 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,640 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,641 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,641 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,641 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,641 WARN L322 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,641 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,641 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,642 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,642 WARN L322 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,642 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,642 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,642 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,642 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,643 WARN L322 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,643 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,644 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,644 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,644 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,644 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,644 WARN L322 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:00,648 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-12-22 13:52:00,650 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:52:00,651 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 [2021-12-22 13:52:00,651 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:52:00,652 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 87 transitions, 234 flow [2021-12-22 13:52:00,688 INFO L129 PetriNetUnfolder]: 98/672 cut-off events. [2021-12-22 13:52:00,688 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-12-22 13:52:00,690 INFO L84 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 672 events. 98/672 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2833 event pairs, 23 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 422. Up to 80 conditions per place. [2021-12-22 13:52:00,690 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 87 transitions, 234 flow [2021-12-22 13:52:00,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 64 transitions, 173 flow [2021-12-22 13:52:00,696 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-22 13:52:00,696 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:52:00,696 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,696 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] [2021-12-22 13:52:00,697 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,697 INFO L85 PathProgramCache]: Analyzing trace with hash 239291490, now seen corresponding path program 1 times [2021-12-22 13:52:00,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117664708] [2021-12-22 13:52:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:00,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:00,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117664708] [2021-12-22 13:52:00,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117664708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:00,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:00,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:52:00,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120951337] [2021-12-22 13:52:00,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:00,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:52:00,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:52:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:52:00,738 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 87 [2021-12-22 13:52:00,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 64 transitions, 173 flow. Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-12-22 13:52:00,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:00,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 87 [2021-12-22 13:52:00,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,747 INFO L129 PetriNetUnfolder]: 0/118 cut-off events. [2021-12-22 13:52:00,747 INFO L130 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2021-12-22 13:52:00,748 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 118 events. 0/118 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 6/118 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-12-22 13:52:00,748 INFO L132 encePairwiseOnDemand]: 86/87 looper letters, 5 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2021-12-22 13:52:00,748 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 181 flow [2021-12-22 13:52:00,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:52:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:52:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2021-12-22 13:52:00,749 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8735632183908046 [2021-12-22 13:52:00,749 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2021-12-22 13:52:00,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2021-12-22 13:52:00,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2021-12-22 13:52:00,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:52:00,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-12-22 13:52:00,750 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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) [2021-12-22 13:52:00,750 INFO L186 Difference]: Start difference. First operand has 74 places, 64 transitions, 173 flow. Second operand 2 states and 152 transitions. [2021-12-22 13:52:00,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 181 flow [2021-12-22 13:52:00,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 63 transitions, 161 flow, removed 10 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:00,752 INFO L242 Difference]: Finished difference. Result has 75 places, 63 transitions, 151 flow [2021-12-22 13:52:00,752 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=151, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2021-12-22 13:52:00,752 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2021-12-22 13:52:00,752 INFO L470 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 151 flow [2021-12-22 13:52:00,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 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) [2021-12-22 13:52:00,752 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,753 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] [2021-12-22 13:52:00,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:52:00,753 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,753 INFO L85 PathProgramCache]: Analyzing trace with hash 239292451, now seen corresponding path program 1 times [2021-12-22 13:52:00,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477450248] [2021-12-22 13:52:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:00,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:00,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477450248] [2021-12-22 13:52:00,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477450248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:00,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:00,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:00,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620038647] [2021-12-22 13:52:00,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:00,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:00,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:00,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:00,767 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 87 [2021-12-22 13:52:00,767 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2021-12-22 13:52:00,767 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:00,767 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 87 [2021-12-22 13:52:00,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,783 INFO L129 PetriNetUnfolder]: 0/115 cut-off events. [2021-12-22 13:52:00,783 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-12-22 13:52:00,783 INFO L84 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 115 events. 0/115 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 0. Up to 30 conditions per place. [2021-12-22 13:52:00,783 INFO L132 encePairwiseOnDemand]: 84/87 looper letters, 14 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2021-12-22 13:52:00,784 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 67 transitions, 191 flow [2021-12-22 13:52:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-12-22 13:52:00,784 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2021-12-22 13:52:00,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-12-22 13:52:00,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-12-22 13:52:00,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-12-22 13:52:00,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-12-22 13:52:00,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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) [2021-12-22 13:52:00,786 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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) [2021-12-22 13:52:00,787 INFO L186 Difference]: Start difference. First operand has 75 places, 63 transitions, 151 flow. Second operand 3 states and 215 transitions. [2021-12-22 13:52:00,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 67 transitions, 191 flow [2021-12-22 13:52:00,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 191 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:00,788 INFO L242 Difference]: Finished difference. Result has 78 places, 64 transitions, 163 flow [2021-12-22 13:52:00,788 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=78, PETRI_TRANSITIONS=64} [2021-12-22 13:52:00,788 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2021-12-22 13:52:00,788 INFO L470 AbstractCegarLoop]: Abstraction has has 78 places, 64 transitions, 163 flow [2021-12-22 13:52:00,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2021-12-22 13:52:00,789 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,789 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] [2021-12-22 13:52:00,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:52:00,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1483448859, now seen corresponding path program 1 times [2021-12-22 13:52:00,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241178158] [2021-12-22 13:52:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:52:00,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:00,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241178158] [2021-12-22 13:52:00,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241178158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:00,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:00,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:00,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165598041] [2021-12-22 13:52:00,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:00,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:00,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:00,808 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 87 [2021-12-22 13:52:00,808 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 64 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2021-12-22 13:52:00,808 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:00,808 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 87 [2021-12-22 13:52:00,808 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:00,857 INFO L129 PetriNetUnfolder]: 212/733 cut-off events. [2021-12-22 13:52:00,857 INFO L130 PetriNetUnfolder]: For 92/92 co-relation queries the response was YES. [2021-12-22 13:52:00,859 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 733 events. 212/733 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4068 event pairs, 118 based on Foata normal form. 5/703 useless extension candidates. Maximal degree in co-relation 1195. Up to 327 conditions per place. [2021-12-22 13:52:00,862 INFO L132 encePairwiseOnDemand]: 80/87 looper letters, 16 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2021-12-22 13:52:00,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 73 transitions, 245 flow [2021-12-22 13:52:00,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:00,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 215 transitions. [2021-12-22 13:52:00,863 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8237547892720306 [2021-12-22 13:52:00,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 215 transitions. [2021-12-22 13:52:00,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 215 transitions. [2021-12-22 13:52:00,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:00,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 215 transitions. [2021-12-22 13:52:00,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2021-12-22 13:52:00,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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) [2021-12-22 13:52:00,864 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 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) [2021-12-22 13:52:00,864 INFO L186 Difference]: Start difference. First operand has 78 places, 64 transitions, 163 flow. Second operand 3 states and 215 transitions. [2021-12-22 13:52:00,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 73 transitions, 245 flow [2021-12-22 13:52:00,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:00,866 INFO L242 Difference]: Finished difference. Result has 80 places, 69 transitions, 201 flow [2021-12-22 13:52:00,866 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2021-12-22 13:52:00,867 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2021-12-22 13:52:00,867 INFO L470 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 201 flow [2021-12-22 13:52:00,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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) [2021-12-22 13:52:00,867 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:00,867 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] [2021-12-22 13:52:00,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:52:00,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1737726477, now seen corresponding path program 1 times [2021-12-22 13:52:00,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429470796] [2021-12-22 13:52:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:00,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:00,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429470796] [2021-12-22 13:52:00,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429470796] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:00,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150950624] [2021-12-22 13:52:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:00,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:00,893 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:52:00,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 13:52:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:00,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:52:00,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:00,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:01,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150950624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:01,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:01,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:52:01,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139037577] [2021-12-22 13:52:01,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:01,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:52:01,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:01,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:52:01,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:52:01,055 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2021-12-22 13:52:01,055 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 201 flow. Second operand has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 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) [2021-12-22 13:52:01,055 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:01,055 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2021-12-22 13:52:01,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:01,123 INFO L129 PetriNetUnfolder]: 161/489 cut-off events. [2021-12-22 13:52:01,123 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-22 13:52:01,125 INFO L84 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 489 events. 161/489 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2426 event pairs, 94 based on Foata normal form. 2/442 useless extension candidates. Maximal degree in co-relation 801. Up to 246 conditions per place. [2021-12-22 13:52:01,126 INFO L132 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2021-12-22 13:52:01,126 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 79 transitions, 271 flow [2021-12-22 13:52:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:52:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:52:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 611 transitions. [2021-12-22 13:52:01,128 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7803320561941252 [2021-12-22 13:52:01,128 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 611 transitions. [2021-12-22 13:52:01,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 611 transitions. [2021-12-22 13:52:01,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:01,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 611 transitions. [2021-12-22 13:52:01,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 67.88888888888889) internal successors, (611), 9 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:52:01,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2021-12-22 13:52:01,130 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 87.0) internal successors, (870), 10 states have internal predecessors, (870), 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) [2021-12-22 13:52:01,130 INFO L186 Difference]: Start difference. First operand has 80 places, 69 transitions, 201 flow. Second operand 9 states and 611 transitions. [2021-12-22 13:52:01,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 79 transitions, 271 flow [2021-12-22 13:52:01,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 79 transitions, 265 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:01,132 INFO L242 Difference]: Finished difference. Result has 90 places, 75 transitions, 245 flow [2021-12-22 13:52:01,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=245, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2021-12-22 13:52:01,132 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 16 predicate places. [2021-12-22 13:52:01,133 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 245 flow [2021-12-22 13:52:01,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.3) internal successors, (673), 10 states have internal predecessors, (673), 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) [2021-12-22 13:52:01,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:01,133 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:01,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 13:52:01,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:01,353 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash 157483872, now seen corresponding path program 1 times [2021-12-22 13:52:01,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:01,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779745074] [2021-12-22 13:52:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:01,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:01,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779745074] [2021-12-22 13:52:01,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779745074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:01,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9102485] [2021-12-22 13:52:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:01,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:01,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:01,424 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:52:01,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 13:52:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:01,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:52:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:01,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:01,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9102485] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:01,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:01,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2021-12-22 13:52:01,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331036025] [2021-12-22 13:52:01,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:01,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 13:52:01,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 13:52:01,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:52:01,733 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 87 [2021-12-22 13:52:01,734 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 245 flow. Second operand has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 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) [2021-12-22 13:52:01,734 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:01,734 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 87 [2021-12-22 13:52:01,734 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:03,419 INFO L129 PetriNetUnfolder]: 1890/3716 cut-off events. [2021-12-22 13:52:03,419 INFO L130 PetriNetUnfolder]: For 2302/2302 co-relation queries the response was YES. [2021-12-22 13:52:03,430 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9452 conditions, 3716 events. 1890/3716 cut-off events. For 2302/2302 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 23790 event pairs, 0 based on Foata normal form. 137/3853 useless extension candidates. Maximal degree in co-relation 9439. Up to 1597 conditions per place. [2021-12-22 13:52:03,446 INFO L132 encePairwiseOnDemand]: 73/87 looper letters, 188 selfloop transitions, 291 changer transitions 0/518 dead transitions. [2021-12-22 13:52:03,447 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 518 transitions, 2986 flow [2021-12-22 13:52:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-22 13:52:03,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-12-22 13:52:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 5377 transitions. [2021-12-22 13:52:03,453 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6791714033093343 [2021-12-22 13:52:03,453 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 5377 transitions. [2021-12-22 13:52:03,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 5377 transitions. [2021-12-22 13:52:03,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:03,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 5377 transitions. [2021-12-22 13:52:03,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 92 states, 91 states have (on average 59.08791208791209) internal successors, (5377), 91 states have internal predecessors, (5377), 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) [2021-12-22 13:52:03,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 92 states, 92 states have (on average 87.0) internal successors, (8004), 92 states have internal predecessors, (8004), 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) [2021-12-22 13:52:03,472 INFO L81 ComplementDD]: Finished complementDD. Result has 92 states, 92 states have (on average 87.0) internal successors, (8004), 92 states have internal predecessors, (8004), 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) [2021-12-22 13:52:03,472 INFO L186 Difference]: Start difference. First operand has 90 places, 75 transitions, 245 flow. Second operand 91 states and 5377 transitions. [2021-12-22 13:52:03,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 518 transitions, 2986 flow [2021-12-22 13:52:03,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 518 transitions, 2879 flow, removed 24 selfloop flow, removed 4 redundant places. [2021-12-22 13:52:03,481 INFO L242 Difference]: Finished difference. Result has 186 places, 344 transitions, 1980 flow [2021-12-22 13:52:03,481 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=1980, PETRI_PLACES=186, PETRI_TRANSITIONS=344} [2021-12-22 13:52:03,481 INFO L334 CegarLoopForPetriNet]: 74 programPoint places, 112 predicate places. [2021-12-22 13:52:03,482 INFO L470 AbstractCegarLoop]: Abstraction has has 186 places, 344 transitions, 1980 flow [2021-12-22 13:52:03,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.0) internal successors, (1197), 21 states have internal predecessors, (1197), 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) [2021-12-22 13:52:03,482 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:03,482 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:03,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 13:52:03,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-22 13:52:03,699 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash -184578877, now seen corresponding path program 1 times [2021-12-22 13:52:03,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730679854] [2021-12-22 13:52:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:03,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:03,711 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:52:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:03,723 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:52:03,724 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:52:03,724 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:52:03,724 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:52:03,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 13:52:03,725 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2021-12-22 13:52:03,725 WARN L234 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:52:03,725 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-12-22 13:52:03,732 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,733 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,733 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,733 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,733 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,733 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,733 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,733 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,733 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,734 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,734 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,734 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,734 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,734 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,734 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,734 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,734 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,735 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,735 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,735 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,735 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,735 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,735 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,735 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,736 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,737 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,737 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,737 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,737 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,737 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,737 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,737 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,737 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,738 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,738 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,738 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,738 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,738 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,738 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,738 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,738 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,739 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,739 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,739 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,739 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,739 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,739 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,739 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,739 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,740 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,740 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,740 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,740 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,740 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,740 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,740 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,740 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,741 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,742 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,742 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,742 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,742 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,742 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,742 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,742 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,742 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,743 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,743 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,743 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,743 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,743 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,743 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,743 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,743 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,744 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,744 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,744 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,744 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,744 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,744 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,744 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,744 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,745 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,745 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,745 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,745 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,745 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,745 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,745 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,745 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,746 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,746 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,746 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,746 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,746 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,746 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,746 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,746 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,747 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,747 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,747 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,747 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,747 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,747 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,748 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,748 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,748 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,748 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,748 WARN L322 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,748 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,749 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,749 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,749 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,749 WARN L322 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,749 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,749 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,749 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,750 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,750 WARN L322 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,750 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,750 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,750 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,750 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,751 WARN L322 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,751 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,751 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,751 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,751 WARN L322 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,751 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,752 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,752 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,752 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,752 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,752 WARN L322 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:03,754 INFO L148 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2021-12-22 13:52:03,755 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:52:03,755 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 [2021-12-22 13:52:03,755 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:52:03,756 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 98 places, 94 transitions, 266 flow [2021-12-22 13:52:03,831 INFO L129 PetriNetUnfolder]: 213/1255 cut-off events. [2021-12-22 13:52:03,832 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2021-12-22 13:52:03,835 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 1255 events. 213/1255 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6828 event pairs, 72 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 771. Up to 192 conditions per place. [2021-12-22 13:52:03,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 94 transitions, 266 flow [2021-12-22 13:52:03,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 70 transitions, 200 flow [2021-12-22 13:52:03,837 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-22 13:52:03,837 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:52:03,837 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:03,837 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] [2021-12-22 13:52:03,837 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:03,838 INFO L85 PathProgramCache]: Analyzing trace with hash -543324351, now seen corresponding path program 1 times [2021-12-22 13:52:03,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:03,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960749795] [2021-12-22 13:52:03,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:03,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:03,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960749795] [2021-12-22 13:52:03,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960749795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:03,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:03,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:03,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473553152] [2021-12-22 13:52:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:03,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:03,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:03,851 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 94 [2021-12-22 13:52:03,852 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2021-12-22 13:52:03,852 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:03,852 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 94 [2021-12-22 13:52:03,852 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:03,873 INFO L129 PetriNetUnfolder]: 0/133 cut-off events. [2021-12-22 13:52:03,874 INFO L130 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2021-12-22 13:52:03,874 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 133 events. 0/133 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 102 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 0. Up to 36 conditions per place. [2021-12-22 13:52:03,874 INFO L132 encePairwiseOnDemand]: 90/94 looper letters, 15 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2021-12-22 13:52:03,874 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 240 flow [2021-12-22 13:52:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:03,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2021-12-22 13:52:03,875 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8262411347517731 [2021-12-22 13:52:03,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2021-12-22 13:52:03,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2021-12-22 13:52:03,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:03,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2021-12-22 13:52:03,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2021-12-22 13:52:03,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2021-12-22 13:52:03,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2021-12-22 13:52:03,877 INFO L186 Difference]: Start difference. First operand has 82 places, 70 transitions, 200 flow. Second operand 3 states and 233 transitions. [2021-12-22 13:52:03,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 240 flow [2021-12-22 13:52:03,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 73 transitions, 210 flow, removed 15 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:03,878 INFO L242 Difference]: Finished difference. Result has 85 places, 70 transitions, 180 flow [2021-12-22 13:52:03,878 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=85, PETRI_TRANSITIONS=70} [2021-12-22 13:52:03,879 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 3 predicate places. [2021-12-22 13:52:03,879 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 70 transitions, 180 flow [2021-12-22 13:52:03,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 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) [2021-12-22 13:52:03,879 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:03,879 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] [2021-12-22 13:52:03,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:52:03,879 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1763634818, now seen corresponding path program 1 times [2021-12-22 13:52:03,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:03,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246132252] [2021-12-22 13:52:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:03,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:52:03,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246132252] [2021-12-22 13:52:03,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246132252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:03,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:03,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:03,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824434088] [2021-12-22 13:52:03,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:03,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:03,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:03,895 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 94 [2021-12-22 13:52:03,895 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-12-22 13:52:03,896 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:03,896 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 94 [2021-12-22 13:52:03,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:03,995 INFO L129 PetriNetUnfolder]: 558/1515 cut-off events. [2021-12-22 13:52:03,996 INFO L130 PetriNetUnfolder]: For 188/188 co-relation queries the response was YES. [2021-12-22 13:52:04,001 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 1515 events. 558/1515 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9726 event pairs, 345 based on Foata normal form. 6/1451 useless extension candidates. Maximal degree in co-relation 2522. Up to 799 conditions per place. [2021-12-22 13:52:04,006 INFO L132 encePairwiseOnDemand]: 86/94 looper letters, 19 selfloop transitions, 7 changer transitions 0/81 dead transitions. [2021-12-22 13:52:04,006 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 81 transitions, 279 flow [2021-12-22 13:52:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:04,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2021-12-22 13:52:04,007 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8191489361702128 [2021-12-22 13:52:04,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2021-12-22 13:52:04,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2021-12-22 13:52:04,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:04,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2021-12-22 13:52:04,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-12-22 13:52:04,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2021-12-22 13:52:04,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 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) [2021-12-22 13:52:04,009 INFO L186 Difference]: Start difference. First operand has 85 places, 70 transitions, 180 flow. Second operand 3 states and 231 transitions. [2021-12-22 13:52:04,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 81 transitions, 279 flow [2021-12-22 13:52:04,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 81 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:04,010 INFO L242 Difference]: Finished difference. Result has 87 places, 76 transitions, 225 flow [2021-12-22 13:52:04,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2021-12-22 13:52:04,011 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2021-12-22 13:52:04,011 INFO L470 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 225 flow [2021-12-22 13:52:04,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 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) [2021-12-22 13:52:04,011 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:04,011 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] [2021-12-22 13:52:04,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 13:52:04,012 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:04,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:04,012 INFO L85 PathProgramCache]: Analyzing trace with hash -35190009, now seen corresponding path program 1 times [2021-12-22 13:52:04,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:04,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311242733] [2021-12-22 13:52:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:04,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:04,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311242733] [2021-12-22 13:52:04,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311242733] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:04,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187647026] [2021-12-22 13:52:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:04,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:04,034 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:52:04,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 13:52:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:52:04,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:04,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:04,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187647026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:04,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:04,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:52:04,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672807850] [2021-12-22 13:52:04,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:04,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:52:04,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:52:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:52:04,196 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 94 [2021-12-22 13:52:04,196 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 225 flow. Second operand has 10 states, 10 states have (on average 72.3) internal successors, (723), 10 states have internal predecessors, (723), 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) [2021-12-22 13:52:04,196 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:04,196 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 94 [2021-12-22 13:52:04,196 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:04,299 INFO L129 PetriNetUnfolder]: 427/1047 cut-off events. [2021-12-22 13:52:04,300 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-12-22 13:52:04,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1744 conditions, 1047 events. 427/1047 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6076 event pairs, 272 based on Foata normal form. 2/947 useless extension candidates. Maximal degree in co-relation 1679. Up to 607 conditions per place. [2021-12-22 13:52:04,306 INFO L132 encePairwiseOnDemand]: 88/94 looper letters, 16 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2021-12-22 13:52:04,306 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 86 transitions, 297 flow [2021-12-22 13:52:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:52:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:52:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 657 transitions. [2021-12-22 13:52:04,307 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.776595744680851 [2021-12-22 13:52:04,307 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 657 transitions. [2021-12-22 13:52:04,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 657 transitions. [2021-12-22 13:52:04,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:04,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 657 transitions. [2021-12-22 13:52:04,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.0) internal successors, (657), 9 states have internal predecessors, (657), 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) [2021-12-22 13:52:04,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 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) [2021-12-22 13:52:04,309 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 94.0) internal successors, (940), 10 states have internal predecessors, (940), 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) [2021-12-22 13:52:04,309 INFO L186 Difference]: Start difference. First operand has 87 places, 76 transitions, 225 flow. Second operand 9 states and 657 transitions. [2021-12-22 13:52:04,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 86 transitions, 297 flow [2021-12-22 13:52:04,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 86 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:04,311 INFO L242 Difference]: Finished difference. Result has 97 places, 82 transitions, 268 flow [2021-12-22 13:52:04,311 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=268, PETRI_PLACES=97, PETRI_TRANSITIONS=82} [2021-12-22 13:52:04,311 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 15 predicate places. [2021-12-22 13:52:04,311 INFO L470 AbstractCegarLoop]: Abstraction has has 97 places, 82 transitions, 268 flow [2021-12-22 13:52:04,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 72.3) internal successors, (723), 10 states have internal predecessors, (723), 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) [2021-12-22 13:52:04,312 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:04,312 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:04,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 13:52:04,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-22 13:52:04,528 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 313922154, now seen corresponding path program 1 times [2021-12-22 13:52:04,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:04,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524806466] [2021-12-22 13:52:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:04,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:04,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:04,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:04,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524806466] [2021-12-22 13:52:04,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524806466] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:04,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142784286] [2021-12-22 13:52:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:04,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:04,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:04,569 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:52:04,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 13:52:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:52:04,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:04,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:04,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142784286] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:04,898 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:04,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2021-12-22 13:52:04,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565568537] [2021-12-22 13:52:04,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:04,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-22 13:52:04,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:04,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-22 13:52:04,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-22 13:52:04,901 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 94 [2021-12-22 13:52:04,901 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 82 transitions, 268 flow. Second operand has 21 states, 21 states have (on average 61.0) internal successors, (1281), 21 states have internal predecessors, (1281), 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) [2021-12-22 13:52:04,901 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:04,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 94 [2021-12-22 13:52:04,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:07,283 INFO L129 PetriNetUnfolder]: 4756/8422 cut-off events. [2021-12-22 13:52:07,284 INFO L130 PetriNetUnfolder]: For 5551/5551 co-relation queries the response was YES. [2021-12-22 13:52:07,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21970 conditions, 8422 events. 4756/8422 cut-off events. For 5551/5551 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 56489 event pairs, 0 based on Foata normal form. 296/8718 useless extension candidates. Maximal degree in co-relation 9277. Up to 4159 conditions per place. [2021-12-22 13:52:07,354 INFO L132 encePairwiseOnDemand]: 79/94 looper letters, 257 selfloop transitions, 388 changer transitions 0/688 dead transitions. [2021-12-22 13:52:07,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 688 transitions, 4008 flow [2021-12-22 13:52:07,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-12-22 13:52:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2021-12-22 13:52:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 6941 transitions. [2021-12-22 13:52:07,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6774350966230724 [2021-12-22 13:52:07,361 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 6941 transitions. [2021-12-22 13:52:07,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 6941 transitions. [2021-12-22 13:52:07,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:07,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 6941 transitions. [2021-12-22 13:52:07,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 63.678899082568805) internal successors, (6941), 109 states have internal predecessors, (6941), 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) [2021-12-22 13:52:07,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 94.0) internal successors, (10340), 110 states have internal predecessors, (10340), 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) [2021-12-22 13:52:07,383 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 94.0) internal successors, (10340), 110 states have internal predecessors, (10340), 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) [2021-12-22 13:52:07,384 INFO L186 Difference]: Start difference. First operand has 97 places, 82 transitions, 268 flow. Second operand 109 states and 6941 transitions. [2021-12-22 13:52:07,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 688 transitions, 4008 flow [2021-12-22 13:52:07,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 688 transitions, 3877 flow, removed 30 selfloop flow, removed 4 redundant places. [2021-12-22 13:52:07,396 INFO L242 Difference]: Finished difference. Result has 214 places, 447 transitions, 2639 flow [2021-12-22 13:52:07,397 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=2639, PETRI_PLACES=214, PETRI_TRANSITIONS=447} [2021-12-22 13:52:07,397 INFO L334 CegarLoopForPetriNet]: 82 programPoint places, 132 predicate places. [2021-12-22 13:52:07,397 INFO L470 AbstractCegarLoop]: Abstraction has has 214 places, 447 transitions, 2639 flow [2021-12-22 13:52:07,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.0) internal successors, (1281), 21 states have internal predecessors, (1281), 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) [2021-12-22 13:52:07,398 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:07,398 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:07,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 13:52:07,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:07,611 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash 2072494017, now seen corresponding path program 1 times [2021-12-22 13:52:07,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:07,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023354208] [2021-12-22 13:52:07,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:07,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:07,625 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 13:52:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 13:52:07,639 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 13:52:07,639 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 13:52:07,640 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-12-22 13:52:07,640 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-12-22 13:52:07,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 13:52:07,640 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-12-22 13:52:07,640 WARN L234 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-12-22 13:52:07,640 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-12-22 13:52:07,647 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,647 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,647 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,647 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,647 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,648 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,649 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,650 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,651 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,652 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,653 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,654 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,655 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,656 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,657 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,658 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,659 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,660 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,661 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,662 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,662 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,662 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,662 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,662 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,662 WARN L322 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,662 WARN L322 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,663 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,663 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,663 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,663 WARN L322 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,663 WARN L322 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,663 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,663 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,664 WARN L322 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,664 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,664 WARN L322 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,664 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,664 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,664 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,664 WARN L322 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,664 WARN L322 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,665 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,665 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,665 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,665 WARN L322 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,665 WARN L322 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,665 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,665 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,666 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,666 WARN L322 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,666 WARN L322 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,666 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,666 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,666 WARN L322 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,666 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,666 WARN L322 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~thread~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-12-22 13:52:07,668 INFO L148 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2021-12-22 13:52:07,669 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:52:07,669 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 [2021-12-22 13:52:07,669 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:52:07,670 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 106 places, 101 transitions, 300 flow [2021-12-22 13:52:07,813 INFO L129 PetriNetUnfolder]: 472/2430 cut-off events. [2021-12-22 13:52:07,813 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2021-12-22 13:52:07,820 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 2430 events. 472/2430 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 16323 event pairs, 201 based on Foata normal form. 0/2142 useless extension candidates. Maximal degree in co-relation 1473. Up to 448 conditions per place. [2021-12-22 13:52:07,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 101 transitions, 300 flow [2021-12-22 13:52:07,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 76 transitions, 229 flow [2021-12-22 13:52:07,823 INFO L129 PetriNetUnfolder]: 1/26 cut-off events. [2021-12-22 13:52:07,823 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-12-22 13:52:07,823 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:07,823 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] [2021-12-22 13:52:07,823 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -196252411, now seen corresponding path program 1 times [2021-12-22 13:52:07,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:07,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862840006] [2021-12-22 13:52:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:07,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:07,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:07,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862840006] [2021-12-22 13:52:07,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862840006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:07,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:07,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:52:07,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407083180] [2021-12-22 13:52:07,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:07,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 13:52:07,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:07,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 13:52:07,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 13:52:07,836 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 101 [2021-12-22 13:52:07,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 229 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 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) [2021-12-22 13:52:07,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:07,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 101 [2021-12-22 13:52:07,837 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:07,847 INFO L129 PetriNetUnfolder]: 0/154 cut-off events. [2021-12-22 13:52:07,848 INFO L130 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2021-12-22 13:52:07,848 INFO L84 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 154 events. 0/154 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 115 event pairs, 0 based on Foata normal form. 8/154 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2021-12-22 13:52:07,848 INFO L132 encePairwiseOnDemand]: 100/101 looper letters, 7 selfloop transitions, 0 changer transitions 0/75 dead transitions. [2021-12-22 13:52:07,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 241 flow [2021-12-22 13:52:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 13:52:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-12-22 13:52:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2021-12-22 13:52:07,849 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8613861386138614 [2021-12-22 13:52:07,849 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2021-12-22 13:52:07,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2021-12-22 13:52:07,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:07,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2021-12-22 13:52:07,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 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) [2021-12-22 13:52:07,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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) [2021-12-22 13:52:07,851 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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) [2021-12-22 13:52:07,851 INFO L186 Difference]: Start difference. First operand has 90 places, 76 transitions, 229 flow. Second operand 2 states and 174 transitions. [2021-12-22 13:52:07,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 241 flow [2021-12-22 13:52:07,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 75 transitions, 199 flow, removed 21 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:07,852 INFO L242 Difference]: Finished difference. Result has 91 places, 75 transitions, 185 flow [2021-12-22 13:52:07,852 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=185, PETRI_PLACES=91, PETRI_TRANSITIONS=75} [2021-12-22 13:52:07,852 INFO L334 CegarLoopForPetriNet]: 90 programPoint places, 1 predicate places. [2021-12-22 13:52:07,853 INFO L470 AbstractCegarLoop]: Abstraction has has 91 places, 75 transitions, 185 flow [2021-12-22 13:52:07,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 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) [2021-12-22 13:52:07,853 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:07,853 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] [2021-12-22 13:52:07,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 13:52:07,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:07,854 INFO L85 PathProgramCache]: Analyzing trace with hash -196251450, now seen corresponding path program 1 times [2021-12-22 13:52:07,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:07,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796705738] [2021-12-22 13:52:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:07,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:07,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796705738] [2021-12-22 13:52:07,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796705738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:07,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:07,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:07,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667915580] [2021-12-22 13:52:07,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:07,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:07,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:07,866 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 101 [2021-12-22 13:52:07,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 75 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-12-22 13:52:07,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:07,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 101 [2021-12-22 13:52:07,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:07,885 INFO L129 PetriNetUnfolder]: 0/151 cut-off events. [2021-12-22 13:52:07,885 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-12-22 13:52:07,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 151 events. 0/151 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 0. Up to 42 conditions per place. [2021-12-22 13:52:07,886 INFO L132 encePairwiseOnDemand]: 98/101 looper letters, 16 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2021-12-22 13:52:07,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 229 flow [2021-12-22 13:52:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:07,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2021-12-22 13:52:07,886 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8151815181518152 [2021-12-22 13:52:07,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2021-12-22 13:52:07,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2021-12-22 13:52:07,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:07,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2021-12-22 13:52:07,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2021-12-22 13:52:07,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 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) [2021-12-22 13:52:07,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 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) [2021-12-22 13:52:07,888 INFO L186 Difference]: Start difference. First operand has 91 places, 75 transitions, 185 flow. Second operand 3 states and 247 transitions. [2021-12-22 13:52:07,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 229 flow [2021-12-22 13:52:07,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 79 transitions, 229 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-12-22 13:52:07,889 INFO L242 Difference]: Finished difference. Result has 94 places, 76 transitions, 197 flow [2021-12-22 13:52:07,889 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=94, PETRI_TRANSITIONS=76} [2021-12-22 13:52:07,890 INFO L334 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2021-12-22 13:52:07,890 INFO L470 AbstractCegarLoop]: Abstraction has has 94 places, 76 transitions, 197 flow [2021-12-22 13:52:07,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2021-12-22 13:52:07,890 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:07,890 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] [2021-12-22 13:52:07,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 13:52:07,891 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1335463192, now seen corresponding path program 1 times [2021-12-22 13:52:07,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:07,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784783273] [2021-12-22 13:52:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:07,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 13:52:07,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:07,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784783273] [2021-12-22 13:52:07,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784783273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:52:07,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:52:07,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:52:07,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114378231] [2021-12-22 13:52:07,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:52:07,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:52:07,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:07,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:52:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:52:07,905 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 101 [2021-12-22 13:52:07,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 76 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2021-12-22 13:52:07,905 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:07,905 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 101 [2021-12-22 13:52:07,905 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:08,120 INFO L129 PetriNetUnfolder]: 1383/3169 cut-off events. [2021-12-22 13:52:08,121 INFO L130 PetriNetUnfolder]: For 380/380 co-relation queries the response was YES. [2021-12-22 13:52:08,162 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 3169 events. 1383/3169 cut-off events. For 380/380 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22276 event pairs, 924 based on Foata normal form. 7/3050 useless extension candidates. Maximal degree in co-relation 5500. Up to 1878 conditions per place. [2021-12-22 13:52:08,174 INFO L132 encePairwiseOnDemand]: 92/101 looper letters, 22 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2021-12-22 13:52:08,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 89 transitions, 313 flow [2021-12-22 13:52:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:52:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-12-22 13:52:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2021-12-22 13:52:08,175 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8151815181518152 [2021-12-22 13:52:08,175 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2021-12-22 13:52:08,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2021-12-22 13:52:08,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:08,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2021-12-22 13:52:08,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 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) [2021-12-22 13:52:08,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 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) [2021-12-22 13:52:08,176 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 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) [2021-12-22 13:52:08,177 INFO L186 Difference]: Start difference. First operand has 94 places, 76 transitions, 197 flow. Second operand 3 states and 247 transitions. [2021-12-22 13:52:08,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 89 transitions, 313 flow [2021-12-22 13:52:08,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 89 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:08,178 INFO L242 Difference]: Finished difference. Result has 96 places, 83 transitions, 249 flow [2021-12-22 13:52:08,179 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2021-12-22 13:52:08,179 INFO L334 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2021-12-22 13:52:08,179 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 249 flow [2021-12-22 13:52:08,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2021-12-22 13:52:08,179 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:08,180 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] [2021-12-22 13:52:08,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 13:52:08,180 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:08,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:08,180 INFO L85 PathProgramCache]: Analyzing trace with hash -446134130, now seen corresponding path program 1 times [2021-12-22 13:52:08,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:08,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222830400] [2021-12-22 13:52:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:08,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:08,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:08,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222830400] [2021-12-22 13:52:08,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222830400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:08,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877020439] [2021-12-22 13:52:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:08,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:08,204 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:52:08,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 13:52:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:08,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 13:52:08,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:08,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:08,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877020439] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:08,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:08,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-22 13:52:08,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799766657] [2021-12-22 13:52:08,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:08,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:52:08,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:08,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:52:08,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:52:08,360 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 101 [2021-12-22 13:52:08,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 83 transitions, 249 flow. Second operand has 10 states, 10 states have (on average 77.3) internal successors, (773), 10 states have internal predecessors, (773), 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) [2021-12-22 13:52:08,361 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:08,361 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 101 [2021-12-22 13:52:08,361 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:08,576 INFO L129 PetriNetUnfolder]: 1060/2259 cut-off events. [2021-12-22 13:52:08,577 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-12-22 13:52:08,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3795 conditions, 2259 events. 1060/2259 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 14831 event pairs, 722 based on Foata normal form. 2/2045 useless extension candidates. Maximal degree in co-relation 3782. Up to 1431 conditions per place. [2021-12-22 13:52:08,596 INFO L132 encePairwiseOnDemand]: 95/101 looper letters, 17 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2021-12-22 13:52:08,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 93 transitions, 323 flow [2021-12-22 13:52:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:52:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-12-22 13:52:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 703 transitions. [2021-12-22 13:52:08,597 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7733773377337734 [2021-12-22 13:52:08,597 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 703 transitions. [2021-12-22 13:52:08,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 703 transitions. [2021-12-22 13:52:08,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:08,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 703 transitions. [2021-12-22 13:52:08,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 78.11111111111111) internal successors, (703), 9 states have internal predecessors, (703), 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) [2021-12-22 13:52:08,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 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) [2021-12-22 13:52:08,599 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 101.0) internal successors, (1010), 10 states have internal predecessors, (1010), 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) [2021-12-22 13:52:08,599 INFO L186 Difference]: Start difference. First operand has 96 places, 83 transitions, 249 flow. Second operand 9 states and 703 transitions. [2021-12-22 13:52:08,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 93 transitions, 323 flow [2021-12-22 13:52:08,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 93 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:08,601 INFO L242 Difference]: Finished difference. Result has 106 places, 89 transitions, 291 flow [2021-12-22 13:52:08,601 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=291, PETRI_PLACES=106, PETRI_TRANSITIONS=89} [2021-12-22 13:52:08,601 INFO L334 CegarLoopForPetriNet]: 90 programPoint places, 16 predicate places. [2021-12-22 13:52:08,601 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 89 transitions, 291 flow [2021-12-22 13:52:08,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 77.3) internal successors, (773), 10 states have internal predecessors, (773), 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) [2021-12-22 13:52:08,602 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:08,602 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:08,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-22 13:52:08,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-22 13:52:08,818 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:08,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:08,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1229042553, now seen corresponding path program 1 times [2021-12-22 13:52:08,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:08,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306552225] [2021-12-22 13:52:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:08,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:08,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:08,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306552225] [2021-12-22 13:52:08,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306552225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:08,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443455570] [2021-12-22 13:52:08,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:08,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:08,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:08,859 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:52:08,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-22 13:52:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 13:52:08,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:09,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:09,130 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-22 13:52:09,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443455570] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:09,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:09,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-12-22 13:52:09,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025280190] [2021-12-22 13:52:09,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:09,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-22 13:52:09,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:09,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-22 13:52:09,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:52:09,132 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 101 [2021-12-22 13:52:09,133 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 89 transitions, 291 flow. Second operand has 15 states, 15 states have (on average 65.6) internal successors, (984), 15 states have internal predecessors, (984), 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) [2021-12-22 13:52:09,133 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:09,133 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 101 [2021-12-22 13:52:09,133 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:11,250 INFO L129 PetriNetUnfolder]: 13197/24216 cut-off events. [2021-12-22 13:52:11,250 INFO L130 PetriNetUnfolder]: For 13012/13148 co-relation queries the response was YES. [2021-12-22 13:52:11,382 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61219 conditions, 24216 events. 13197/24216 cut-off events. For 13012/13148 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 194366 event pairs, 2292 based on Foata normal form. 125/24341 useless extension candidates. Maximal degree in co-relation 61204. Up to 12355 conditions per place. [2021-12-22 13:52:11,496 INFO L132 encePairwiseOnDemand]: 86/101 looper letters, 106 selfloop transitions, 90 changer transitions 0/247 dead transitions. [2021-12-22 13:52:11,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 247 transitions, 1437 flow [2021-12-22 13:52:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-22 13:52:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-12-22 13:52:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1364 transitions. [2021-12-22 13:52:11,498 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7107868681605003 [2021-12-22 13:52:11,498 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1364 transitions. [2021-12-22 13:52:11,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1364 transitions. [2021-12-22 13:52:11,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:11,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1364 transitions. [2021-12-22 13:52:11,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 71.78947368421052) internal successors, (1364), 19 states have internal predecessors, (1364), 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) [2021-12-22 13:52:11,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 101.0) internal successors, (2020), 20 states have internal predecessors, (2020), 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) [2021-12-22 13:52:11,578 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 101.0) internal successors, (2020), 20 states have internal predecessors, (2020), 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) [2021-12-22 13:52:11,578 INFO L186 Difference]: Start difference. First operand has 106 places, 89 transitions, 291 flow. Second operand 19 states and 1364 transitions. [2021-12-22 13:52:11,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 247 transitions, 1437 flow [2021-12-22 13:52:11,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 247 transitions, 1409 flow, removed 12 selfloop flow, removed 1 redundant places. [2021-12-22 13:52:11,603 INFO L242 Difference]: Finished difference. Result has 125 places, 163 transitions, 832 flow [2021-12-22 13:52:11,603 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=832, PETRI_PLACES=125, PETRI_TRANSITIONS=163} [2021-12-22 13:52:11,603 INFO L334 CegarLoopForPetriNet]: 90 programPoint places, 35 predicate places. [2021-12-22 13:52:11,604 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 163 transitions, 832 flow [2021-12-22 13:52:11,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 65.6) internal successors, (984), 15 states have internal predecessors, (984), 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) [2021-12-22 13:52:11,604 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:11,604 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:11,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-22 13:52:11,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-22 13:52:11,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:11,823 INFO L85 PathProgramCache]: Analyzing trace with hash -329000904, now seen corresponding path program 1 times [2021-12-22 13:52:11,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:11,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890045234] [2021-12-22 13:52:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:11,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:52:11,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:11,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890045234] [2021-12-22 13:52:11,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890045234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574089646] [2021-12-22 13:52:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:11,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:11,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:11,884 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:52:11,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-22 13:52:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-22 13:52:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:52:12,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 13:52:12,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574089646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:12,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:12,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-22 13:52:12,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659348610] [2021-12-22 13:52:12,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:12,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-22 13:52:12,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:12,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-22 13:52:12,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:52:12,218 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2021-12-22 13:52:12,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 163 transitions, 832 flow. Second operand has 22 states, 22 states have (on average 65.18181818181819) internal successors, (1434), 22 states have internal predecessors, (1434), 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) [2021-12-22 13:52:12,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:12,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2021-12-22 13:52:12,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:18,774 INFO L129 PetriNetUnfolder]: 33114/56771 cut-off events. [2021-12-22 13:52:18,775 INFO L130 PetriNetUnfolder]: For 112010/112014 co-relation queries the response was YES. [2021-12-22 13:52:19,253 INFO L84 FinitePrefix]: Finished finitePrefix Result has 203632 conditions, 56771 events. 33114/56771 cut-off events. For 112010/112014 co-relation queries the response was YES. Maximal size of possible extension queue 1839. Compared 485208 event pairs, 3235 based on Foata normal form. 356/57127 useless extension candidates. Maximal degree in co-relation 203614. Up to 29173 conditions per place. [2021-12-22 13:52:19,757 INFO L132 encePairwiseOnDemand]: 83/101 looper letters, 329 selfloop transitions, 493 changer transitions 0/878 dead transitions. [2021-12-22 13:52:19,758 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 878 transitions, 7075 flow [2021-12-22 13:52:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-22 13:52:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-12-22 13:52:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 5200 transitions. [2021-12-22 13:52:19,762 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6686382924006686 [2021-12-22 13:52:19,762 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 5200 transitions. [2021-12-22 13:52:19,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 5200 transitions. [2021-12-22 13:52:19,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:19,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 5200 transitions. [2021-12-22 13:52:19,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 67.53246753246754) internal successors, (5200), 77 states have internal predecessors, (5200), 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) [2021-12-22 13:52:19,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 101.0) internal successors, (7878), 78 states have internal predecessors, (7878), 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) [2021-12-22 13:52:19,775 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 101.0) internal successors, (7878), 78 states have internal predecessors, (7878), 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) [2021-12-22 13:52:19,775 INFO L186 Difference]: Start difference. First operand has 125 places, 163 transitions, 832 flow. Second operand 77 states and 5200 transitions. [2021-12-22 13:52:19,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 878 transitions, 7075 flow [2021-12-22 13:52:19,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 878 transitions, 7053 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-12-22 13:52:19,973 INFO L242 Difference]: Finished difference. Result has 222 places, 608 transitions, 5270 flow [2021-12-22 13:52:19,974 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=5270, PETRI_PLACES=222, PETRI_TRANSITIONS=608} [2021-12-22 13:52:19,974 INFO L334 CegarLoopForPetriNet]: 90 programPoint places, 132 predicate places. [2021-12-22 13:52:19,974 INFO L470 AbstractCegarLoop]: Abstraction has has 222 places, 608 transitions, 5270 flow [2021-12-22 13:52:19,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.18181818181819) internal successors, (1434), 22 states have internal predecessors, (1434), 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) [2021-12-22 13:52:19,975 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-12-22 13:52:19,975 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:52:20,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-22 13:52:20,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-22 13:52:20,191 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-12-22 13:52:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:52:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1661907186, now seen corresponding path program 1 times [2021-12-22 13:52:20,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:52:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676768186] [2021-12-22 13:52:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:20,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:52:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 13:52:20,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:52:20,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676768186] [2021-12-22 13:52:20,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676768186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:52:20,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121985716] [2021-12-22 13:52:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:52:20,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:52:20,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:52:20,308 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:52:20,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-22 13:52:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:52:20,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:52:20,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:52:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 13:52:20,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:52:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 13:52:20,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121985716] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:52:20,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:52:20,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2021-12-22 13:52:20,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540424074] [2021-12-22 13:52:20,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:52:20,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 13:52:20,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:52:20,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 13:52:20,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-12-22 13:52:20,735 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2021-12-22 13:52:20,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 608 transitions, 5270 flow. Second operand has 24 states, 24 states have (on average 65.20833333333333) internal successors, (1565), 24 states have internal predecessors, (1565), 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) [2021-12-22 13:52:20,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-12-22 13:52:20,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2021-12-22 13:52:20,736 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-12-22 13:52:42,176 INFO L129 PetriNetUnfolder]: 71642/126978 cut-off events. [2021-12-22 13:52:42,177 INFO L130 PetriNetUnfolder]: For 1086474/1086524 co-relation queries the response was YES. [2021-12-22 13:52:44,488 INFO L84 FinitePrefix]: Finished finitePrefix Result has 654980 conditions, 126978 events. 71642/126978 cut-off events. For 1086474/1086524 co-relation queries the response was YES. Maximal size of possible extension queue 4286. Compared 1255235 event pairs, 4647 based on Foata normal form. 466/127440 useless extension candidates. Maximal degree in co-relation 654937. Up to 58289 conditions per place. [2021-12-22 13:52:45,572 INFO L132 encePairwiseOnDemand]: 84/101 looper letters, 449 selfloop transitions, 1035 changer transitions 0/1582 dead transitions. [2021-12-22 13:52:45,572 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1582 transitions, 17886 flow [2021-12-22 13:52:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-12-22 13:52:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-12-22 13:52:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 4408 transitions. [2021-12-22 13:52:45,576 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6714394516374714 [2021-12-22 13:52:45,576 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 4408 transitions. [2021-12-22 13:52:45,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 4408 transitions. [2021-12-22 13:52:45,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-22 13:52:45,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 4408 transitions. [2021-12-22 13:52:45,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 67.81538461538462) internal successors, (4408), 65 states have internal predecessors, (4408), 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) [2021-12-22 13:52:45,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 101.0) internal successors, (6666), 66 states have internal predecessors, (6666), 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) [2021-12-22 13:52:45,586 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 101.0) internal successors, (6666), 66 states have internal predecessors, (6666), 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) [2021-12-22 13:52:45,586 INFO L186 Difference]: Start difference. First operand has 222 places, 608 transitions, 5270 flow. Second operand 65 states and 4408 transitions. [2021-12-22 13:52:45,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1582 transitions, 17886 flow