/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:49:41,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:49:42,002 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:49:42,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:49:42,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:49:42,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:49:42,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:49:42,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:49:42,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:49:42,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:49:42,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:49:42,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:49:42,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:49:42,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:49:42,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:49:42,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:49:42,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:49:42,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:49:42,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:49:42,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:49:42,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:49:42,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:49:42,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:49:42,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:49:42,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:49:42,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:49:42,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:49:42,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:49:42,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:49:42,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:49:42,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:49:42,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:49:42,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:49:42,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:49:42,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:49:42,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:49:42,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:49:42,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:49:42,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:49:42,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:49:42,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:49:42,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 17:49:42,162 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:49:42,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:49:42,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:49:42,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:49:42,164 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:49:42,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:49:42,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:49:42,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:49:42,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:49:42,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:49:42,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:49:42,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:49:42,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:49:42,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:49:42,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:49:42,168 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:49:42,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:49:42,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:49:42,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:49:42,168 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:49:42,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:49:42,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:49:42,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:49:42,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:49:42,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:49:42,170 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:49:42,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:49:42,170 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:49:42,170 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:49:42,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:49:42,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:49:42,473 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:49:42,477 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:49:42,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:49:42,481 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:49:42,482 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.opt.i [2020-10-09 17:49:42,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435a49e81/1999f29ec12149698fce40cbea1c872c/FLAG0717e1b81 [2020-10-09 17:49:43,095 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:49:43,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_tso.opt.i [2020-10-09 17:49:43,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435a49e81/1999f29ec12149698fce40cbea1c872c/FLAG0717e1b81 [2020-10-09 17:49:43,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435a49e81/1999f29ec12149698fce40cbea1c872c [2020-10-09 17:49:43,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:49:43,465 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:49:43,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:49:43,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:49:43,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:49:43,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:49:43" (1/1) ... [2020-10-09 17:49:43,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df071a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:43, skipping insertion in model container [2020-10-09 17:49:43,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:49:43" (1/1) ... [2020-10-09 17:49:43,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:49:43,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:49:44,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:49:44,010 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:49:44,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:49:44,128 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:49:44,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44 WrapperNode [2020-10-09 17:49:44,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:49:44,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:49:44,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:49:44,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:49:44,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,178 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:49:44,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:49:44,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:49:44,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:49:44,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,198 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (1/1) ... [2020-10-09 17:49:44,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:49:44,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:49:44,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:49:44,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:49:44,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (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 [2020-10-09 17:49:44,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:49:44,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:49:44,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:49:44,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:49:44,275 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:49:44,275 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:49:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:49:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:49:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:49:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:49:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:49:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:49:44,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:49:44,279 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 17:49:44,635 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:49:44,635 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:49:44,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:49:44 BoogieIcfgContainer [2020-10-09 17:49:44,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:49:44,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:49:44,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:49:44,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:49:44,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:49:43" (1/3) ... [2020-10-09 17:49:44,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb71afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:49:44, skipping insertion in model container [2020-10-09 17:49:44,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:49:44" (2/3) ... [2020-10-09 17:49:44,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb71afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:49:44, skipping insertion in model container [2020-10-09 17:49:44,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:49:44" (3/3) ... [2020-10-09 17:49:44,650 INFO L111 eAbstractionObserver]: Analyzing ICFG safe021_tso.opt.i [2020-10-09 17:49:44,659 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:49:44,666 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:49:44,667 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:49:44,695 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,696 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,696 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,696 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,697 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,697 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,697 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,698 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,698 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,698 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,699 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,699 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,700 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,700 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,700 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,700 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,701 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,701 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,705 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,705 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,705 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,706 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,714 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,714 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,715 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,715 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,718 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,718 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,718 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,718 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:49:44,739 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:49:44,759 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:49:44,759 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:49:44,759 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:49:44,760 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:49:44,760 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:49:44,760 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:49:44,760 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:49:44,760 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:49:44,773 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:49:44,818 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-09 17:49:44,818 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:49:44,824 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 2/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-09 17:49:44,824 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:49:44,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-09 17:49:44,853 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-09 17:49:44,853 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:49:44,854 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:44,855 INFO L255 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] [2020-10-09 17:49:44,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:44,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1121550976, now seen corresponding path program 1 times [2020-10-09 17:49:44,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:44,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067144712] [2020-10-09 17:49:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 17:49:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:49:45,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:45,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:45,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:45,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067144712] [2020-10-09 17:49:45,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:45,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:49:45,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851022185] [2020-10-09 17:49:45,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:49:45,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:49:45,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:49:45,582 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 70 [2020-10-09 17:49:45,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 121 flow. Second operand 8 states. [2020-10-09 17:49:45,585 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:45,585 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 70 [2020-10-09 17:49:45,586 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:45,693 INFO L129 PetriNetUnfolder]: 3/70 cut-off events. [2020-10-09 17:49:45,693 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:49:45,694 INFO L80 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 70 events. 3/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 4/73 useless extension candidates. Maximal degree in co-relation 75. Up to 7 conditions per place. [2020-10-09 17:49:45,696 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 6 selfloop transitions, 2 changer transitions 11/65 dead transitions. [2020-10-09 17:49:45,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 175 flow [2020-10-09 17:49:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:49:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:49:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 562 transitions. [2020-10-09 17:49:45,715 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8920634920634921 [2020-10-09 17:49:45,716 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 562 transitions. [2020-10-09 17:49:45,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 562 transitions. [2020-10-09 17:49:45,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:45,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 562 transitions. [2020-10-09 17:49:45,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:49:45,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:49:45,737 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:49:45,739 INFO L185 Difference]: Start difference. First operand has 65 places, 56 transitions, 121 flow. Second operand 9 states and 562 transitions. [2020-10-09 17:49:45,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 175 flow [2020-10-09 17:49:45,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:49:45,751 INFO L241 Difference]: Finished difference. Result has 77 places, 54 transitions, 134 flow [2020-10-09 17:49:45,754 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=134, PETRI_PLACES=77, PETRI_TRANSITIONS=54} [2020-10-09 17:49:45,755 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 12 predicate places. [2020-10-09 17:49:45,755 INFO L481 AbstractCegarLoop]: Abstraction has has 77 places, 54 transitions, 134 flow [2020-10-09 17:49:45,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:49:45,756 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:45,756 INFO L255 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] [2020-10-09 17:49:45,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:49:45,970 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:45,970 INFO L82 PathProgramCache]: Analyzing trace with hash -166532991, now seen corresponding path program 1 times [2020-10-09 17:49:45,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:45,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1136891013] [2020-10-09 17:49:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 17:49:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:46,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:49:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:46,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:46,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:46,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1136891013] [2020-10-09 17:49:46,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:46,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:49:46,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990203123] [2020-10-09 17:49:46,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:49:46,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:46,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:49:46,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:49:46,292 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 70 [2020-10-09 17:49:46,293 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 54 transitions, 134 flow. Second operand 8 states. [2020-10-09 17:49:46,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:46,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 70 [2020-10-09 17:49:46,293 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:46,446 INFO L129 PetriNetUnfolder]: 18/143 cut-off events. [2020-10-09 17:49:46,446 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2020-10-09 17:49:46,448 INFO L80 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 143 events. 18/143 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 524 event pairs, 0 based on Foata normal form. 5/146 useless extension candidates. Maximal degree in co-relation 235. Up to 15 conditions per place. [2020-10-09 17:49:46,448 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 10 selfloop transitions, 5 changer transitions 23/83 dead transitions. [2020-10-09 17:49:46,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 83 transitions, 308 flow [2020-10-09 17:49:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:49:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:49:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 808 transitions. [2020-10-09 17:49:46,452 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8879120879120879 [2020-10-09 17:49:46,453 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 808 transitions. [2020-10-09 17:49:46,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 808 transitions. [2020-10-09 17:49:46,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:46,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 808 transitions. [2020-10-09 17:49:46,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:49:46,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:49:46,458 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:49:46,458 INFO L185 Difference]: Start difference. First operand has 77 places, 54 transitions, 134 flow. Second operand 13 states and 808 transitions. [2020-10-09 17:49:46,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 83 transitions, 308 flow [2020-10-09 17:49:46,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 256 flow, removed 24 selfloop flow, removed 8 redundant places. [2020-10-09 17:49:46,463 INFO L241 Difference]: Finished difference. Result has 85 places, 56 transitions, 160 flow [2020-10-09 17:49:46,463 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=160, PETRI_PLACES=85, PETRI_TRANSITIONS=56} [2020-10-09 17:49:46,464 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:49:46,464 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 56 transitions, 160 flow [2020-10-09 17:49:46,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:49:46,464 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:46,465 INFO L255 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] [2020-10-09 17:49:46,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:49:46,676 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:46,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1842181502, now seen corresponding path program 1 times [2020-10-09 17:49:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:46,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1708277410] [2020-10-09 17:49:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 17:49:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:46,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:49:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:46,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:46,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:46,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1708277410] [2020-10-09 17:49:46,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:46,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:49:46,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517249292] [2020-10-09 17:49:46,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:49:46,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:46,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:49:46,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:49:47,063 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2020-10-09 17:49:47,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 56 transitions, 160 flow. Second operand 9 states. [2020-10-09 17:49:47,064 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:47,064 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2020-10-09 17:49:47,064 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:47,179 INFO L129 PetriNetUnfolder]: 8/123 cut-off events. [2020-10-09 17:49:47,179 INFO L130 PetriNetUnfolder]: For 110/134 co-relation queries the response was YES. [2020-10-09 17:49:47,180 INFO L80 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 123 events. 8/123 cut-off events. For 110/134 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 428 event pairs, 0 based on Foata normal form. 4/125 useless extension candidates. Maximal degree in co-relation 235. Up to 13 conditions per place. [2020-10-09 17:49:47,181 INFO L132 encePairwiseOnDemand]: 62/70 looper letters, 6 selfloop transitions, 4 changer transitions 12/68 dead transitions. [2020-10-09 17:49:47,181 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 68 transitions, 265 flow [2020-10-09 17:49:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:49:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:49:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 604 transitions. [2020-10-09 17:49:47,184 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8628571428571429 [2020-10-09 17:49:47,184 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 604 transitions. [2020-10-09 17:49:47,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 604 transitions. [2020-10-09 17:49:47,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:47,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 604 transitions. [2020-10-09 17:49:47,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:49:47,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:49:47,188 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:49:47,188 INFO L185 Difference]: Start difference. First operand has 85 places, 56 transitions, 160 flow. Second operand 10 states and 604 transitions. [2020-10-09 17:49:47,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 68 transitions, 265 flow [2020-10-09 17:49:47,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 68 transitions, 223 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-09 17:49:47,193 INFO L241 Difference]: Finished difference. Result has 84 places, 56 transitions, 172 flow [2020-10-09 17:49:47,194 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=172, PETRI_PLACES=84, PETRI_TRANSITIONS=56} [2020-10-09 17:49:47,194 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2020-10-09 17:49:47,194 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 56 transitions, 172 flow [2020-10-09 17:49:47,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:49:47,194 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:47,195 INFO L255 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] [2020-10-09 17:49:47,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:49:47,414 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:47,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash -2059740886, now seen corresponding path program 1 times [2020-10-09 17:49:47,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:47,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188863070] [2020-10-09 17:49:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 17:49:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:47,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:49:47,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:47,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:47,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:47,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188863070] [2020-10-09 17:49:47,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:47,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:49:47,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87346159] [2020-10-09 17:49:47,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:49:47,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:47,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:49:47,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:49:47,616 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:49:47,617 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 56 transitions, 172 flow. Second operand 8 states. [2020-10-09 17:49:47,617 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:47,617 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:49:47,618 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:47,849 INFO L129 PetriNetUnfolder]: 128/399 cut-off events. [2020-10-09 17:49:47,854 INFO L130 PetriNetUnfolder]: For 75/75 co-relation queries the response was YES. [2020-10-09 17:49:47,860 INFO L80 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 399 events. 128/399 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2283 event pairs, 0 based on Foata normal form. 15/395 useless extension candidates. Maximal degree in co-relation 707. Up to 72 conditions per place. [2020-10-09 17:49:47,862 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 10 selfloop transitions, 9 changer transitions 29/94 dead transitions. [2020-10-09 17:49:47,862 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 94 transitions, 344 flow [2020-10-09 17:49:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:49:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:49:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 735 transitions. [2020-10-09 17:49:47,865 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.875 [2020-10-09 17:49:47,865 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 735 transitions. [2020-10-09 17:49:47,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 735 transitions. [2020-10-09 17:49:47,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:47,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 735 transitions. [2020-10-09 17:49:47,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:49:47,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:49:47,870 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:49:47,870 INFO L185 Difference]: Start difference. First operand has 84 places, 56 transitions, 172 flow. Second operand 12 states and 735 transitions. [2020-10-09 17:49:47,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 94 transitions, 344 flow [2020-10-09 17:49:47,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 94 transitions, 313 flow, removed 9 selfloop flow, removed 11 redundant places. [2020-10-09 17:49:47,877 INFO L241 Difference]: Finished difference. Result has 87 places, 62 transitions, 239 flow [2020-10-09 17:49:47,878 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=239, PETRI_PLACES=87, PETRI_TRANSITIONS=62} [2020-10-09 17:49:47,878 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 22 predicate places. [2020-10-09 17:49:47,878 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 62 transitions, 239 flow [2020-10-09 17:49:47,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:49:47,878 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:47,879 INFO L255 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] [2020-10-09 17:49:48,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:49:48,093 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:48,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2106632896, now seen corresponding path program 1 times [2020-10-09 17:49:48,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:48,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191186814] [2020-10-09 17:49:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 17:49:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:48,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:49:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:48,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:48,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:48,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191186814] [2020-10-09 17:49:48,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:48,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:49:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716836609] [2020-10-09 17:49:48,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:49:48,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:48,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:49:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:49:48,349 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:49:48,350 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 239 flow. Second operand 10 states. [2020-10-09 17:49:48,351 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:48,351 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:49:48,351 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:48,542 INFO L129 PetriNetUnfolder]: 32/165 cut-off events. [2020-10-09 17:49:48,542 INFO L130 PetriNetUnfolder]: For 721/771 co-relation queries the response was YES. [2020-10-09 17:49:48,543 INFO L80 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 165 events. 32/165 cut-off events. For 721/771 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 614 event pairs, 0 based on Foata normal form. 28/191 useless extension candidates. Maximal degree in co-relation 556. Up to 53 conditions per place. [2020-10-09 17:49:48,544 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 4 selfloop transitions, 12 changer transitions 15/75 dead transitions. [2020-10-09 17:49:48,544 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 75 transitions, 422 flow [2020-10-09 17:49:48,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:49:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:49:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 658 transitions. [2020-10-09 17:49:48,547 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8545454545454545 [2020-10-09 17:49:48,547 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 658 transitions. [2020-10-09 17:49:48,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 658 transitions. [2020-10-09 17:49:48,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:48,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 658 transitions. [2020-10-09 17:49:48,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:49:48,551 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:49:48,551 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:49:48,551 INFO L185 Difference]: Start difference. First operand has 87 places, 62 transitions, 239 flow. Second operand 11 states and 658 transitions. [2020-10-09 17:49:48,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 75 transitions, 422 flow [2020-10-09 17:49:48,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 75 transitions, 332 flow, removed 39 selfloop flow, removed 8 redundant places. [2020-10-09 17:49:48,556 INFO L241 Difference]: Finished difference. Result has 89 places, 60 transitions, 236 flow [2020-10-09 17:49:48,556 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=236, PETRI_PLACES=89, PETRI_TRANSITIONS=60} [2020-10-09 17:49:48,557 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 24 predicate places. [2020-10-09 17:49:48,557 INFO L481 AbstractCegarLoop]: Abstraction has has 89 places, 60 transitions, 236 flow [2020-10-09 17:49:48,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:49:48,557 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:49:48,557 INFO L255 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] [2020-10-09 17:49:48,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:49:48,778 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:49:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:49:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash -292971458, now seen corresponding path program 1 times [2020-10-09 17:49:48,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:49:48,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285062766] [2020-10-09 17:49:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 17:49:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:49:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:49:48,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:49:48,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:49:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:48,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:49:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 17:49:48,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285062766] [2020-10-09 17:49:48,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:49:48,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:49:48,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935184019] [2020-10-09 17:49:48,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:49:48,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:49:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:49:48,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:49:49,089 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2020-10-09 17:49:49,090 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 60 transitions, 236 flow. Second operand 9 states. [2020-10-09 17:49:49,090 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:49:49,090 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2020-10-09 17:49:49,090 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:49:49,143 INFO L129 PetriNetUnfolder]: 5/69 cut-off events. [2020-10-09 17:49:49,143 INFO L130 PetriNetUnfolder]: For 58/63 co-relation queries the response was YES. [2020-10-09 17:49:49,144 INFO L80 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 69 events. 5/69 cut-off events. For 58/63 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 135. Up to 11 conditions per place. [2020-10-09 17:49:49,145 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2020-10-09 17:49:49,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 58 transitions, 250 flow [2020-10-09 17:49:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:49:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:49:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 416 transitions. [2020-10-09 17:49:49,148 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8489795918367347 [2020-10-09 17:49:49,148 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 416 transitions. [2020-10-09 17:49:49,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 416 transitions. [2020-10-09 17:49:49,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:49:49,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 416 transitions. [2020-10-09 17:49:49,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:49:49,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:49:49,151 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:49:49,151 INFO L185 Difference]: Start difference. First operand has 89 places, 60 transitions, 236 flow. Second operand 7 states and 416 transitions. [2020-10-09 17:49:49,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 58 transitions, 250 flow [2020-10-09 17:49:49,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 58 transitions, 166 flow, removed 20 selfloop flow, removed 18 redundant places. [2020-10-09 17:49:49,154 INFO L241 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2020-10-09 17:49:49,155 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2020-10-09 17:49:49,155 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2020-10-09 17:49:49,155 INFO L481 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2020-10-09 17:49:49,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:49:49,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:49:49,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:49:49 BasicIcfg [2020-10-09 17:49:49,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:49:49,386 INFO L168 Benchmark]: Toolchain (without parser) took 5919.57 ms. Allocated memory was 251.1 MB in the beginning and 425.2 MB in the end (delta: 174.1 MB). Free memory was 204.0 MB in the beginning and 303.7 MB in the end (delta: -99.7 MB). Peak memory consumption was 74.3 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:49,386 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 251.1 MB. Free memory is still 225.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:49:49,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.05 ms. Allocated memory was 251.1 MB in the beginning and 314.0 MB in the end (delta: 62.9 MB). Free memory was 204.0 MB in the beginning and 267.2 MB in the end (delta: -63.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:49,392 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.80 ms. Allocated memory is still 314.0 MB. Free memory was 267.2 MB in the beginning and 264.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:49,392 INFO L168 Benchmark]: Boogie Preprocessor took 27.01 ms. Allocated memory is still 314.0 MB. Free memory is still 264.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:49:49,393 INFO L168 Benchmark]: RCFGBuilder took 431.94 ms. Allocated memory is still 314.0 MB. Free memory was 264.7 MB in the beginning and 240.3 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:49,394 INFO L168 Benchmark]: TraceAbstraction took 4743.26 ms. Allocated memory was 314.0 MB in the beginning and 425.2 MB in the end (delta: 111.1 MB). Free memory was 240.3 MB in the beginning and 303.7 MB in the end (delta: -63.4 MB). Peak memory consumption was 47.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:49:49,401 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 251.1 MB. Free memory is still 225.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 663.05 ms. Allocated memory was 251.1 MB in the beginning and 314.0 MB in the end (delta: 62.9 MB). Free memory was 204.0 MB in the beginning and 267.2 MB in the end (delta: -63.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.80 ms. Allocated memory is still 314.0 MB. Free memory was 267.2 MB in the beginning and 264.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.01 ms. Allocated memory is still 314.0 MB. Free memory is still 264.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 431.94 ms. Allocated memory is still 314.0 MB. Free memory was 264.7 MB in the beginning and 240.3 MB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4743.26 ms. Allocated memory was 314.0 MB in the beginning and 425.2 MB in the end (delta: 111.1 MB). Free memory was 240.3 MB in the beginning and 303.7 MB in the end (delta: -63.4 MB). Peak memory consumption was 47.8 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 235 SDslu, 416 SDs, 0 SdLazy, 405 SolverSat, 71 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 521 GetRequests, 430 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 247 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 482 ConstructedInterpolants, 0 QuantifiedInterpolants, 51689 SizeOfPredicates, 40 NumberOfNonLiveVariables, 634 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...