/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 16:52:34,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 16:52:34,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 16:52:34,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 16:52:34,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-13 16:52:34,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-13 16:52:34,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-13 16:52:34,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf [2021-08-13 16:52:34,381 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 16:52:34,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 16:52:34,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 16:52:34,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 16:52:34,384 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 16:52:34,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 16:52:34,384 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 16:52:34,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 16:52:34,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 16:52:34,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 16:52:34,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 16:52:34,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 16:52:34,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 16:52:34,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 16:52:34,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 16:52:34,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 16:52:34,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 16:52:34,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 16:52:34,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 16:52:34,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 16:52:34,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 16:52:34,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 16:52:34,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 16:52:34,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 16:52:34,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 16:52:34,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 16:52:34,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 16:52:34,387 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 16:52:34,387 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 16:52:34,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 16:52:34,387 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 16:52:34,388 INFO L138 SettingsManager]: * Use hitting sets in computation of OwickiGries annotation=true [2021-08-13 16:52:34,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-13 16:52:34,388 INFO L138 SettingsManager]: * Simplify away covered predicates in OwickiGries annotation=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 16:52:34,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 16:52:34,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 16:52:34,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 16:52:34,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-13 16:52:34,683 INFO L275 PluginConnector]: CDTParser initialized [2021-08-13 16:52:34,684 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe035_pso.opt.i [2021-08-13 16:52:34,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b397b74/872139a887b24af780ec9bfd95999667/FLAG83f359448 [2021-08-13 16:52:35,451 INFO L306 CDTParser]: Found 1 translation units. [2021-08-13 16:52:35,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_pso.opt.i [2021-08-13 16:52:35,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b397b74/872139a887b24af780ec9bfd95999667/FLAG83f359448 [2021-08-13 16:52:35,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47b397b74/872139a887b24af780ec9bfd95999667 [2021-08-13 16:52:35,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 16:52:35,525 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-13 16:52:35,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-13 16:52:35,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-13 16:52:35,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-13 16:52:35,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@781988ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35, skipping insertion in model container [2021-08-13 16:52:35,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-13 16:52:35,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-13 16:52:35,673 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_pso.opt.i[949,962] [2021-08-13 16:52:35,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-13 16:52:35,815 INFO L203 MainTranslator]: Completed pre-run [2021-08-13 16:52:35,822 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe035_pso.opt.i[949,962] [2021-08-13 16:52:35,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-13 16:52:35,879 INFO L208 MainTranslator]: Completed translation [2021-08-13 16:52:35,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35 WrapperNode [2021-08-13 16:52:35,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-13 16:52:35,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 16:52:35,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 16:52:35,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 16:52:35,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 16:52:35,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 16:52:35,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 16:52:35,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 16:52:35,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... [2021-08-13 16:52:35,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 16:52:35,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 16:52:35,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 16:52:35,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 16:52:35,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 16:52:36,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-13 16:52:36,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-13 16:52:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-13 16:52:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-13 16:52:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-08-13 16:52:36,053 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-08-13 16:52:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-08-13 16:52:36,053 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-08-13 16:52:36,053 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-08-13 16:52:36,053 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-08-13 16:52:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-13 16:52:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-13 16:52:36,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 16:52:36,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 16:52:36,055 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 16:52:36,289 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 16:52:36,289 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-08-13 16:52:36,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 04:52:36 BoogieIcfgContainer [2021-08-13 16:52:36,291 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 16:52:36,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 16:52:36,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 16:52:36,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 16:52:36,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.08 04:52:35" (1/3) ... [2021-08-13 16:52:36,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c8cb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 04:52:36, skipping insertion in model container [2021-08-13 16:52:36,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.08 04:52:35" (2/3) ... [2021-08-13 16:52:36,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c8cb77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 04:52:36, skipping insertion in model container [2021-08-13 16:52:36,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 04:52:36" (3/3) ... [2021-08-13 16:52:36,298 INFO L111 eAbstractionObserver]: Analyzing ICFG safe035_pso.opt.i [2021-08-13 16:52:36,301 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 16:52:36,302 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 16:52:36,302 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 16:52:36,323 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,324 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,324 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,324 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,324 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,324 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,324 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,324 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,325 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,325 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,325 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,325 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,326 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,326 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,326 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,326 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,326 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,326 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,326 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,326 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,327 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,327 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,327 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,327 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,327 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,328 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,328 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,328 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,328 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,328 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,328 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,328 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,329 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,329 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,329 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,329 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,330 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,330 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,331 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,331 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,334 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,334 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,334 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,334 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,336 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,336 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,336 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,336 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 16:52:36,337 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 16:52:36,351 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-13 16:52:36,364 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 16:52:36,364 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 16:52:36,364 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 16:52:36,364 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 16:52:36,364 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 16:52:36,364 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 16:52:36,365 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 16:52:36,365 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 16:52:36,372 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 92 places, 84 transitions, 183 flow [2021-08-13 16:52:36,397 INFO L129 PetriNetUnfolder]: 2/81 cut-off events. [2021-08-13 16:52:36,397 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 16:52:36,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 2/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 63. Up to 2 conditions per place. [2021-08-13 16:52:36,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 84 transitions, 183 flow [2021-08-13 16:52:36,402 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 69 transitions, 147 flow [2021-08-13 16:52:36,415 INFO L129 PetriNetUnfolder]: 1/68 cut-off events. [2021-08-13 16:52:36,415 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 16:52:36,415 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 16:52:36,416 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 16:52:36,416 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-13 16:52:36,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 16:52:36,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1593178653, now seen corresponding path program 1 times [2021-08-13 16:52:36,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 16:52:36,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882768124] [2021-08-13 16:52:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 16:52:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 16:52:36,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:36,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:36,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:36,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:36,605 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-08-13 16:52:36,606 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-08-13 16:52:36,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:36,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:36,631 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:36,632 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:36,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:36,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 16:52:36,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 16:52:36,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882768124] [2021-08-13 16:52:36,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882768124] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 16:52:36,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 16:52:36,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 16:52:36,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280218169] [2021-08-13 16:52:36,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 16:52:36,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 16:52:36,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 16:52:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-13 16:52:36,670 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 84 [2021-08-13 16:52:36,677 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 73.16666666666667) internal successors, (439), 6 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:36,682 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 16:52:36,682 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 84 [2021-08-13 16:52:36,683 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 16:52:36,835 INFO L129 PetriNetUnfolder]: 3/82 cut-off events. [2021-08-13 16:52:36,835 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 16:52:36,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 82 events. 3/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 87 event pairs, 0 based on Foata normal form. 4/85 useless extension candidates. Maximal degree in co-relation 81. Up to 7 conditions per place. [2021-08-13 16:52:36,837 INFO L132 encePairwiseOnDemand]: 77/84 looper letters, 6 selfloop transitions, 2 changer transitions 11/78 dead transitions. [2021-08-13 16:52:36,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 78 transitions, 201 flow [2021-08-13 16:52:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 16:52:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 16:52:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 670 transitions. [2021-08-13 16:52:36,852 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8862433862433863 [2021-08-13 16:52:36,852 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 670 transitions. [2021-08-13 16:52:36,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 670 transitions. [2021-08-13 16:52:36,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 16:52:36,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 670 transitions. [2021-08-13 16:52:36,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 74.44444444444444) internal successors, (670), 9 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:36,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:36,867 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:36,868 INFO L348 CegarLoopForPetriNet]: 78 programPoint places, 8 predicate places. [2021-08-13 16:52:36,868 INFO L482 AbstractCegarLoop]: Abstraction has has 86 places, 78 transitions, 201 flow [2021-08-13 16:52:36,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 73.16666666666667) internal successors, (439), 6 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:36,868 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 16:52:36,869 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 16:52:36,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 16:52:36,869 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-13 16:52:36,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 16:52:36,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1261263538, now seen corresponding path program 1 times [2021-08-13 16:52:36,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 16:52:36,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619859149] [2021-08-13 16:52:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 16:52:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 16:52:37,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:37,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:37,015 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-08-13 16:52:37,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-08-13 16:52:37,033 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:37,041 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,042 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:37,049 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,049 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 16:52:37,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 16:52:37,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619859149] [2021-08-13 16:52:37,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619859149] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 16:52:37,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 16:52:37,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 16:52:37,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928277826] [2021-08-13 16:52:37,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 16:52:37,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 16:52:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 16:52:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-13 16:52:37,054 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 84 [2021-08-13 16:52:37,054 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 78 transitions, 201 flow. Second operand has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,054 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 16:52:37,054 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 84 [2021-08-13 16:52:37,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 16:52:37,210 INFO L129 PetriNetUnfolder]: 174/583 cut-off events. [2021-08-13 16:52:37,210 INFO L130 PetriNetUnfolder]: For 52/94 co-relation queries the response was YES. [2021-08-13 16:52:37,212 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 583 events. 174/583 cut-off events. For 52/94 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3854 event pairs, 40 based on Foata normal form. 6/574 useless extension candidates. Maximal degree in co-relation 1080. Up to 108 conditions per place. [2021-08-13 16:52:37,213 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 11 selfloop transitions, 2 changer transitions 55/125 dead transitions. [2021-08-13 16:52:37,213 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 503 flow [2021-08-13 16:52:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 16:52:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 16:52:37,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 662 transitions. [2021-08-13 16:52:37,215 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8756613756613757 [2021-08-13 16:52:37,215 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 662 transitions. [2021-08-13 16:52:37,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 662 transitions. [2021-08-13 16:52:37,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 16:52:37,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 662 transitions. [2021-08-13 16:52:37,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 73.55555555555556) internal successors, (662), 9 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,218 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,218 INFO L348 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2021-08-13 16:52:37,218 INFO L482 AbstractCegarLoop]: Abstraction has has 94 places, 125 transitions, 503 flow [2021-08-13 16:52:37,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,218 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 16:52:37,218 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 16:52:37,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 16:52:37,219 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-13 16:52:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 16:52:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1516219153, now seen corresponding path program 1 times [2021-08-13 16:52:37,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 16:52:37,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040303407] [2021-08-13 16:52:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 16:52:37,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 16:52:37,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,260 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:37,261 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,261 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:37,268 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-08-13 16:52:37,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-08-13 16:52:37,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 16:52:37,285 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 16:52:37,285 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:37,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 16:52:37,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 16:52:37,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040303407] [2021-08-13 16:52:37,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040303407] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 16:52:37,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 16:52:37,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 16:52:37,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706260588] [2021-08-13 16:52:37,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 16:52:37,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 16:52:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 16:52:37,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-13 16:52:37,294 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 84 [2021-08-13 16:52:37,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 125 transitions, 503 flow. Second operand has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 16:52:37,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 84 [2021-08-13 16:52:37,295 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 16:52:37,525 INFO L129 PetriNetUnfolder]: 511/1406 cut-off events. [2021-08-13 16:52:37,526 INFO L130 PetriNetUnfolder]: For 80/101 co-relation queries the response was YES. [2021-08-13 16:52:37,529 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2847 conditions, 1406 events. 511/1406 cut-off events. For 80/101 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11366 event pairs, 43 based on Foata normal form. 4/1324 useless extension candidates. Maximal degree in co-relation 2810. Up to 331 conditions per place. [2021-08-13 16:52:37,532 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 24 selfloop transitions, 17 changer transitions 28/155 dead transitions. [2021-08-13 16:52:37,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 155 transitions, 645 flow [2021-08-13 16:52:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 16:52:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 16:52:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 743 transitions. [2021-08-13 16:52:37,535 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8845238095238095 [2021-08-13 16:52:37,535 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 743 transitions. [2021-08-13 16:52:37,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 743 transitions. [2021-08-13 16:52:37,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 16:52:37,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 743 transitions. [2021-08-13 16:52:37,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 74.3) internal successors, (743), 10 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,538 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 84.0) internal successors, (924), 11 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,538 INFO L348 CegarLoopForPetriNet]: 78 programPoint places, 25 predicate places. [2021-08-13 16:52:37,538 INFO L482 AbstractCegarLoop]: Abstraction has has 103 places, 155 transitions, 645 flow [2021-08-13 16:52:37,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 71.16666666666667) internal successors, (427), 6 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,539 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 16:52:37,539 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 16:52:37,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 16:52:37,539 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-13 16:52:37,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 16:52:37,539 INFO L82 PathProgramCache]: Analyzing trace with hash 222343714, now seen corresponding path program 1 times [2021-08-13 16:52:37,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 16:52:37,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264456751] [2021-08-13 16:52:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 16:52:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 16:52:37,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:37,578 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,579 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:37,581 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:37,585 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-08-13 16:52:37,585 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-08-13 16:52:37,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 16:52:37,604 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 16:52:37,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:37,611 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 16:52:37,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 16:52:37,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264456751] [2021-08-13 16:52:37,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264456751] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 16:52:37,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 16:52:37,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 16:52:37,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138088430] [2021-08-13 16:52:37,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 16:52:37,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 16:52:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 16:52:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-13 16:52:37,614 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 84 [2021-08-13 16:52:37,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 155 transitions, 645 flow. Second operand has 7 states, 7 states have (on average 71.14285714285714) internal successors, (498), 7 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 16:52:37,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 84 [2021-08-13 16:52:37,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 16:52:37,839 INFO L129 PetriNetUnfolder]: 345/1004 cut-off events. [2021-08-13 16:52:37,839 INFO L130 PetriNetUnfolder]: For 96/429 co-relation queries the response was YES. [2021-08-13 16:52:37,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2527 conditions, 1004 events. 345/1004 cut-off events. For 96/429 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 7676 event pairs, 8 based on Foata normal form. 76/1020 useless extension candidates. Maximal degree in co-relation 2487. Up to 274 conditions per place. [2021-08-13 16:52:37,846 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 22 selfloop transitions, 44 changer transitions 63/189 dead transitions. [2021-08-13 16:52:37,846 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 189 transitions, 937 flow [2021-08-13 16:52:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-13 16:52:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-08-13 16:52:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 967 transitions. [2021-08-13 16:52:37,848 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8855311355311355 [2021-08-13 16:52:37,849 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 967 transitions. [2021-08-13 16:52:37,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 967 transitions. [2021-08-13 16:52:37,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 16:52:37,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 967 transitions. [2021-08-13 16:52:37,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 74.38461538461539) internal successors, (967), 13 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,852 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 84.0) internal successors, (1176), 14 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,852 INFO L348 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2021-08-13 16:52:37,852 INFO L482 AbstractCegarLoop]: Abstraction has has 115 places, 189 transitions, 937 flow [2021-08-13 16:52:37,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 71.14285714285714) internal successors, (498), 7 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,853 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 16:52:37,853 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 16:52:37,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 16:52:37,854 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-13 16:52:37,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 16:52:37,855 INFO L82 PathProgramCache]: Analyzing trace with hash 2025646115, now seen corresponding path program 1 times [2021-08-13 16:52:37,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 16:52:37,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406169547] [2021-08-13 16:52:37,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 16:52:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 16:52:37,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:37,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:37,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:37,901 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:37,905 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.8 percent of original size [2021-08-13 16:52:37,906 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-08-13 16:52:37,917 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,917 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 16:52:37,923 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-08-13 16:52:37,924 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:37,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:37,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 16:52:37,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 16:52:37,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406169547] [2021-08-13 16:52:37,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406169547] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 16:52:37,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 16:52:37,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-13 16:52:37,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249138451] [2021-08-13 16:52:37,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 16:52:37,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 16:52:37,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 16:52:37,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-13 16:52:37,933 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 84 [2021-08-13 16:52:37,934 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 189 transitions, 937 flow. Second operand has 8 states, 8 states have (on average 71.125) internal successors, (569), 8 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:37,934 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 16:52:37,934 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 84 [2021-08-13 16:52:37,934 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 16:52:38,169 INFO L129 PetriNetUnfolder]: 312/863 cut-off events. [2021-08-13 16:52:38,170 INFO L130 PetriNetUnfolder]: For 186/696 co-relation queries the response was YES. [2021-08-13 16:52:38,172 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2787 conditions, 863 events. 312/863 cut-off events. For 186/696 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6506 event pairs, 3 based on Foata normal form. 98/911 useless extension candidates. Maximal degree in co-relation 2744. Up to 250 conditions per place. [2021-08-13 16:52:38,174 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 19 selfloop transitions, 48 changer transitions 47/174 dead transitions. [2021-08-13 16:52:38,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 174 transitions, 1079 flow [2021-08-13 16:52:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-13 16:52:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-08-13 16:52:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1176 transitions. [2021-08-13 16:52:38,177 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.875 [2021-08-13 16:52:38,177 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1176 transitions. [2021-08-13 16:52:38,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1176 transitions. [2021-08-13 16:52:38,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 16:52:38,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1176 transitions. [2021-08-13 16:52:38,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 73.5) internal successors, (1176), 16 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,181 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,181 INFO L348 CegarLoopForPetriNet]: 78 programPoint places, 43 predicate places. [2021-08-13 16:52:38,181 INFO L482 AbstractCegarLoop]: Abstraction has has 121 places, 174 transitions, 1079 flow [2021-08-13 16:52:38,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 71.125) internal successors, (569), 8 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,181 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 16:52:38,181 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 16:52:38,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 16:52:38,181 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-13 16:52:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 16:52:38,182 INFO L82 PathProgramCache]: Analyzing trace with hash -167665499, now seen corresponding path program 1 times [2021-08-13 16:52:38,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 16:52:38,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796559466] [2021-08-13 16:52:38,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 16:52:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 16:52:38,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,212 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:38,213 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:38,215 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-08-13 16:52:38,216 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-08-13 16:52:38,222 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-08-13 16:52:38,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-08-13 16:52:38,233 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,234 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:38,239 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:38,246 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 16:52:38,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 16:52:38,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796559466] [2021-08-13 16:52:38,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796559466] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 16:52:38,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 16:52:38,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 16:52:38,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085122542] [2021-08-13 16:52:38,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 16:52:38,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 16:52:38,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 16:52:38,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 16:52:38,248 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 84 [2021-08-13 16:52:38,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 174 transitions, 1079 flow. Second operand has 7 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 16:52:38,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 84 [2021-08-13 16:52:38,249 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 16:52:38,571 INFO L129 PetriNetUnfolder]: 678/1827 cut-off events. [2021-08-13 16:52:38,571 INFO L130 PetriNetUnfolder]: For 531/1090 co-relation queries the response was YES. [2021-08-13 16:52:38,576 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6059 conditions, 1827 events. 678/1827 cut-off events. For 531/1090 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 17019 event pairs, 0 based on Foata normal form. 4/1691 useless extension candidates. Maximal degree in co-relation 6010. Up to 541 conditions per place. [2021-08-13 16:52:38,579 INFO L132 encePairwiseOnDemand]: 74/84 looper letters, 16 selfloop transitions, 11 changer transitions 55/191 dead transitions. [2021-08-13 16:52:38,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 191 transitions, 1241 flow [2021-08-13 16:52:38,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-13 16:52:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-08-13 16:52:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 753 transitions. [2021-08-13 16:52:38,581 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.814935064935065 [2021-08-13 16:52:38,581 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 753 transitions. [2021-08-13 16:52:38,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 753 transitions. [2021-08-13 16:52:38,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 16:52:38,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 753 transitions. [2021-08-13 16:52:38,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 68.45454545454545) internal successors, (753), 11 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 84.0) internal successors, (1008), 12 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,584 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 84.0) internal successors, (1008), 12 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,584 INFO L348 CegarLoopForPetriNet]: 78 programPoint places, 53 predicate places. [2021-08-13 16:52:38,584 INFO L482 AbstractCegarLoop]: Abstraction has has 131 places, 191 transitions, 1241 flow [2021-08-13 16:52:38,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,584 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 16:52:38,584 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 16:52:38,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-13 16:52:38,585 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-13 16:52:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 16:52:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1048592313, now seen corresponding path program 2 times [2021-08-13 16:52:38,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 16:52:38,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088408021] [2021-08-13 16:52:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 16:52:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 16:52:38,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:38,613 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:38,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 16:52:38,619 INFO L142 QuantifierPusher]: treesize reduction 1, result has 95.0 percent of original size [2021-08-13 16:52:38,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-08-13 16:52:38,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:38,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,636 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 16:52:38,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 16:52:38,642 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 16:52:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 16:52:38,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 16:52:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088408021] [2021-08-13 16:52:38,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088408021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 16:52:38,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 16:52:38,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 16:52:38,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690912232] [2021-08-13 16:52:38,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 16:52:38,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 16:52:38,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 16:52:38,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 16:52:38,644 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 84 [2021-08-13 16:52:38,645 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 191 transitions, 1241 flow. Second operand has 7 states, 7 states have (on average 71.42857142857143) internal successors, (500), 7 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,645 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 16:52:38,645 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 84 [2021-08-13 16:52:38,645 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 16:52:38,855 INFO L129 PetriNetUnfolder]: 1008/2682 cut-off events. [2021-08-13 16:52:38,855 INFO L130 PetriNetUnfolder]: For 828/1693 co-relation queries the response was YES. [2021-08-13 16:52:38,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8971 conditions, 2682 events. 1008/2682 cut-off events. For 828/1693 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 26926 event pairs, 0 based on Foata normal form. 6/2467 useless extension candidates. Maximal degree in co-relation 8918. Up to 805 conditions per place. [2021-08-13 16:52:38,868 INFO L132 encePairwiseOnDemand]: 78/84 looper letters, 0 selfloop transitions, 0 changer transitions 200/200 dead transitions. [2021-08-13 16:52:38,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 200 transitions, 1375 flow [2021-08-13 16:52:38,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-13 16:52:38,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-08-13 16:52:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 505 transitions. [2021-08-13 16:52:38,870 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.858843537414966 [2021-08-13 16:52:38,870 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 505 transitions. [2021-08-13 16:52:38,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 505 transitions. [2021-08-13 16:52:38,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 16:52:38,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 505 transitions. [2021-08-13 16:52:38,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 72.14285714285714) internal successors, (505), 7 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,872 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,872 INFO L348 CegarLoopForPetriNet]: 78 programPoint places, 57 predicate places. [2021-08-13 16:52:38,872 INFO L482 AbstractCegarLoop]: Abstraction has has 135 places, 200 transitions, 1375 flow [2021-08-13 16:52:38,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 71.42857142857143) internal successors, (500), 7 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 16:52:38,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown