/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/safe025_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:54:06,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:54:06,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:54:06,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:54:06,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:54:06,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:54:06,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:54:06,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:54:06,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:54:06,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:54:06,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:54:06,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:54:06,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:54:06,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:54:06,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:54:06,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:54:06,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:54:06,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:54:06,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:54:06,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:54:06,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:54:06,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:54:06,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:54:06,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:54:06,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:54:06,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:54:06,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:54:06,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:54:06,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:54:06,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:54:06,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:54:06,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:54:06,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:54:06,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:54:06,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:54:06,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:54:06,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:54:06,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:54:06,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:54:06,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:54:06,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:54:06,238 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 17:54:06,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:54:06,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:54:06,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:54:06,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:54:06,281 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:54:06,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:54:06,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:54:06,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:54:06,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:54:06,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:54:06,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:54:06,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:54:06,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:54:06,284 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:54:06,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:54:06,284 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:54:06,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:54:06,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:54:06,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:54:06,285 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:54:06,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:54:06,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:54:06,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:54:06,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:54:06,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:54:06,286 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:54:06,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:54:06,287 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:54:06,287 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:54:06,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:54:06,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:54:06,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:54:06,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:54:06,618 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:54:06,618 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:54:06,619 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe025_tso.opt.i [2020-10-09 17:54:06,678 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd0cf4b82/437af45bc7974711a23f482730c03df8/FLAGec5ca9a25 [2020-10-09 17:54:07,218 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:54:07,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe025_tso.opt.i [2020-10-09 17:54:07,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd0cf4b82/437af45bc7974711a23f482730c03df8/FLAGec5ca9a25 [2020-10-09 17:54:07,516 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd0cf4b82/437af45bc7974711a23f482730c03df8 [2020-10-09 17:54:07,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:54:07,525 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:54:07,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:54:07,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:54:07,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:54:07,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:54:07" (1/1) ... [2020-10-09 17:54:07,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a9523c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:07, skipping insertion in model container [2020-10-09 17:54:07,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:54:07" (1/1) ... [2020-10-09 17:54:07,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:54:07,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:54:08,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:54:08,040 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:54:08,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:54:08,164 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:54:08,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08 WrapperNode [2020-10-09 17:54:08,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:54:08,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:54:08,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:54:08,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:54:08,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:54:08,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:54:08,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:54:08,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:54:08,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (1/1) ... [2020-10-09 17:54:08,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:54:08,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:54:08,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:54:08,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:54:08,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (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 17:54:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:54:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:54:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:54:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:54:08,314 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:54:08,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:54:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:54:08,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:54:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:54:08,315 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:54:08,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:54:08,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:54:08,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:54:08,324 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 17:54:08,707 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:54:08,708 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:54:08,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:54:08 BoogieIcfgContainer [2020-10-09 17:54:08,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:54:08,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:54:08,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:54:08,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:54:08,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:54:07" (1/3) ... [2020-10-09 17:54:08,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d77bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:54:08, skipping insertion in model container [2020-10-09 17:54:08,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:54:08" (2/3) ... [2020-10-09 17:54:08,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d77bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:54:08, skipping insertion in model container [2020-10-09 17:54:08,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:54:08" (3/3) ... [2020-10-09 17:54:08,719 INFO L111 eAbstractionObserver]: Analyzing ICFG safe025_tso.opt.i [2020-10-09 17:54:08,731 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:54:08,739 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:54:08,740 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:54:08,766 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,766 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,766 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,767 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,767 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,768 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,768 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,768 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,769 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,769 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,769 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,769 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,770 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,770 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,770 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,771 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,771 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,771 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,775 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,775 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,775 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,776 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,785 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,785 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,786 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,786 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,788 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,788 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,789 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,789 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:54:08,807 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:54:08,828 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:54:08,828 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:54:08,828 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:54:08,828 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:54:08,829 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:54:08,829 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:54:08,829 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:54:08,829 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:54:08,842 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:54:08,889 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-09 17:54:08,889 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:54:08,895 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 51 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 17:54:08,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-09 17:54:08,901 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-09 17:54:08,919 INFO L129 PetriNetUnfolder]: 1/55 cut-off events. [2020-10-09 17:54:08,920 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:54:08,920 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:54:08,921 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 17:54:08,921 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:54:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:54:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2081382383, now seen corresponding path program 1 times [2020-10-09 17:54:08,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:54:08,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1122557451] [2020-10-09 17:54:08,939 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 17:54:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:54:09,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:54:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:54:09,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:09,228 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 17:54:09,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:54:09,301 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 17:54:09,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1122557451] [2020-10-09 17:54:09,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:54:09,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:54:09,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133653647] [2020-10-09 17:54:09,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:54:09,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:54:09,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:54:09,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:54:09,718 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 70 [2020-10-09 17:54:09,720 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 121 flow. Second operand 8 states. [2020-10-09 17:54:09,721 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:54:09,721 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 70 [2020-10-09 17:54:09,722 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:54:09,876 INFO L129 PetriNetUnfolder]: 7/83 cut-off events. [2020-10-09 17:54:09,876 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:54:09,877 INFO L80 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 83 events. 7/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 142 event pairs, 0 based on Foata normal form. 6/88 useless extension candidates. Maximal degree in co-relation 97. Up to 8 conditions per place. [2020-10-09 17:54:09,879 INFO L132 encePairwiseOnDemand]: 62/70 looper letters, 6 selfloop transitions, 3 changer transitions 18/72 dead transitions. [2020-10-09 17:54:09,879 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 205 flow [2020-10-09 17:54:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:54:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:54:09,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 799 transitions. [2020-10-09 17:54:09,899 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.878021978021978 [2020-10-09 17:54:09,900 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 799 transitions. [2020-10-09 17:54:09,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 799 transitions. [2020-10-09 17:54:09,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:54:09,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 799 transitions. [2020-10-09 17:54:09,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:54:09,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:54:09,922 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:54:09,925 INFO L185 Difference]: Start difference. First operand has 65 places, 56 transitions, 121 flow. Second operand 13 states and 799 transitions. [2020-10-09 17:54:09,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 205 flow [2020-10-09 17:54:09,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:54:09,935 INFO L241 Difference]: Finished difference. Result has 85 places, 54 transitions, 146 flow [2020-10-09 17:54:09,939 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=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=146, PETRI_PLACES=85, PETRI_TRANSITIONS=54} [2020-10-09 17:54:09,940 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:54:09,941 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 54 transitions, 146 flow [2020-10-09 17:54:09,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:54:09,941 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:54:09,941 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] [2020-10-09 17:54:10,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:54:10,156 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:54:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:54:10,156 INFO L82 PathProgramCache]: Analyzing trace with hash 129834660, now seen corresponding path program 1 times [2020-10-09 17:54:10,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:54:10,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1081813482] [2020-10-09 17:54:10,159 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 17:54:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:54:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:54:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:54:10,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:10,276 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 17:54:10,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:54:10,323 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 17:54:10,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1081813482] [2020-10-09 17:54:10,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:54:10,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:54:10,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094282578] [2020-10-09 17:54:10,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:54:10,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:54:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:54:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:54:10,480 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 70 [2020-10-09 17:54:10,481 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 54 transitions, 146 flow. Second operand 8 states. [2020-10-09 17:54:10,481 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:54:10,481 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 70 [2020-10-09 17:54:10,481 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:54:10,588 INFO L129 PetriNetUnfolder]: 3/69 cut-off events. [2020-10-09 17:54:10,588 INFO L130 PetriNetUnfolder]: For 40/42 co-relation queries the response was YES. [2020-10-09 17:54:10,589 INFO L80 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 69 events. 3/69 cut-off events. For 40/42 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 91 event pairs, 0 based on Foata normal form. 2/71 useless extension candidates. Maximal degree in co-relation 118. Up to 7 conditions per place. [2020-10-09 17:54:10,590 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 6 selfloop transitions, 2 changer transitions 10/64 dead transitions. [2020-10-09 17:54:10,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 64 transitions, 230 flow [2020-10-09 17:54:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:54:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:54:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 560 transitions. [2020-10-09 17:54:10,593 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-10-09 17:54:10,593 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 560 transitions. [2020-10-09 17:54:10,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 560 transitions. [2020-10-09 17:54:10,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:54:10,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 560 transitions. [2020-10-09 17:54:10,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:54:10,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:54:10,598 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:54:10,598 INFO L185 Difference]: Start difference. First operand has 85 places, 54 transitions, 146 flow. Second operand 9 states and 560 transitions. [2020-10-09 17:54:10,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 64 transitions, 230 flow [2020-10-09 17:54:10,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 182 flow, removed 21 selfloop flow, removed 12 redundant places. [2020-10-09 17:54:10,606 INFO L241 Difference]: Finished difference. Result has 78 places, 54 transitions, 142 flow [2020-10-09 17:54:10,607 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=142, PETRI_PLACES=78, PETRI_TRANSITIONS=54} [2020-10-09 17:54:10,607 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2020-10-09 17:54:10,608 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 54 transitions, 142 flow [2020-10-09 17:54:10,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:54:10,608 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:54:10,609 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 17:54:10,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:54:10,831 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:54:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:54:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash -220298001, now seen corresponding path program 1 times [2020-10-09 17:54:10,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:54:10,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117973226] [2020-10-09 17:54:10,833 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 17:54:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:54:10,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:54:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:54:10,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:10,964 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 17:54:10,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:54:11,031 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 17:54:11,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117973226] [2020-10-09 17:54:11,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:54:11,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2020-10-09 17:54:11,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422149010] [2020-10-09 17:54:11,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:54:11,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:54:11,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:54:11,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:54:11,318 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:54:11,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 54 transitions, 142 flow. Second operand 10 states. [2020-10-09 17:54:11,319 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:54:11,319 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:54:11,319 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:54:11,469 INFO L129 PetriNetUnfolder]: 0/81 cut-off events. [2020-10-09 17:54:11,469 INFO L130 PetriNetUnfolder]: For 43/87 co-relation queries the response was YES. [2020-10-09 17:54:11,470 INFO L80 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 81 events. 0/81 cut-off events. For 43/87 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 183 event pairs, 0 based on Foata normal form. 5/86 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2020-10-09 17:54:11,470 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 6 selfloop transitions, 5 changer transitions 11/65 dead transitions. [2020-10-09 17:54:11,471 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 65 transitions, 243 flow [2020-10-09 17:54:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:54:11,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:54:11,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 765 transitions. [2020-10-09 17:54:11,474 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8406593406593407 [2020-10-09 17:54:11,474 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 765 transitions. [2020-10-09 17:54:11,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 765 transitions. [2020-10-09 17:54:11,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:54:11,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 765 transitions. [2020-10-09 17:54:11,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:54:11,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:54:11,480 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:54:11,480 INFO L185 Difference]: Start difference. First operand has 78 places, 54 transitions, 142 flow. Second operand 13 states and 765 transitions. [2020-10-09 17:54:11,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 65 transitions, 243 flow [2020-10-09 17:54:11,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 65 transitions, 207 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:54:11,484 INFO L241 Difference]: Finished difference. Result has 84 places, 54 transitions, 156 flow [2020-10-09 17:54:11,485 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=156, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2020-10-09 17:54:11,485 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 19 predicate places. [2020-10-09 17:54:11,485 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 156 flow [2020-10-09 17:54:11,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:54:11,486 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:54:11,486 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 17:54:11,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:54:11,701 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:54:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:54:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1888915201, now seen corresponding path program 2 times [2020-10-09 17:54:11,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:54:11,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743906692] [2020-10-09 17:54:11,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 17:54:11,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:54:11,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:54:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:54:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:54:11,786 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:11,809 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 17:54:11,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:54:11,835 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 17:54:11,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743906692] [2020-10-09 17:54:11,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:54:11,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:54:11,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738488075] [2020-10-09 17:54:11,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:54:11,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:54:11,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:54:11,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:54:11,950 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:54:11,951 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 156 flow. Second operand 8 states. [2020-10-09 17:54:11,951 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:54:11,951 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:54:11,951 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:54:12,168 INFO L129 PetriNetUnfolder]: 64/223 cut-off events. [2020-10-09 17:54:12,169 INFO L130 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2020-10-09 17:54:12,171 INFO L80 FinitePrefix]: Finished finitePrefix Result has 422 conditions, 223 events. 64/223 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 952 event pairs, 0 based on Foata normal form. 8/225 useless extension candidates. Maximal degree in co-relation 392. Up to 36 conditions per place. [2020-10-09 17:54:12,172 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 10 selfloop transitions, 9 changer transitions 29/92 dead transitions. [2020-10-09 17:54:12,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 92 transitions, 328 flow [2020-10-09 17:54:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:54:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:54:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 735 transitions. [2020-10-09 17:54:12,176 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.875 [2020-10-09 17:54:12,176 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 735 transitions. [2020-10-09 17:54:12,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 735 transitions. [2020-10-09 17:54:12,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:54:12,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 735 transitions. [2020-10-09 17:54:12,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:54:12,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:54:12,180 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:54:12,180 INFO L185 Difference]: Start difference. First operand has 84 places, 54 transitions, 156 flow. Second operand 12 states and 735 transitions. [2020-10-09 17:54:12,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 92 transitions, 328 flow [2020-10-09 17:54:12,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 294 flow, removed 10 selfloop flow, removed 13 redundant places. [2020-10-09 17:54:12,185 INFO L241 Difference]: Finished difference. Result has 83 places, 60 transitions, 220 flow [2020-10-09 17:54:12,185 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=220, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2020-10-09 17:54:12,185 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 18 predicate places. [2020-10-09 17:54:12,185 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 220 flow [2020-10-09 17:54:12,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:54:12,186 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:54:12,186 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 17:54:12,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:54:12,398 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:54:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:54:12,399 INFO L82 PathProgramCache]: Analyzing trace with hash 70597897, now seen corresponding path program 1 times [2020-10-09 17:54:12,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:54:12,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1813372139] [2020-10-09 17:54:12,401 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 17:54:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:54:12,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:54:12,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:54:12,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:12,511 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 17:54:12,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:54:12,550 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 17:54:12,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1813372139] [2020-10-09 17:54:12,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:54:12,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:54:12,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786151795] [2020-10-09 17:54:12,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:54:12,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:54:12,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:54:12,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:54:12,637 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:54:12,638 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 220 flow. Second operand 10 states. [2020-10-09 17:54:12,638 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:54:12,638 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:54:12,638 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:54:12,834 INFO L129 PetriNetUnfolder]: 16/100 cut-off events. [2020-10-09 17:54:12,834 INFO L130 PetriNetUnfolder]: For 361/386 co-relation queries the response was YES. [2020-10-09 17:54:12,838 INFO L80 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 100 events. 16/100 cut-off events. For 361/386 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 211 event pairs, 0 based on Foata normal form. 14/113 useless extension candidates. Maximal degree in co-relation 295. Up to 27 conditions per place. [2020-10-09 17:54:12,838 INFO L132 encePairwiseOnDemand]: 61/70 looper letters, 4 selfloop transitions, 12 changer transitions 13/73 dead transitions. [2020-10-09 17:54:12,838 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 73 transitions, 403 flow [2020-10-09 17:54:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:54:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:54:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 658 transitions. [2020-10-09 17:54:12,842 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8545454545454545 [2020-10-09 17:54:12,843 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 658 transitions. [2020-10-09 17:54:12,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 658 transitions. [2020-10-09 17:54:12,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:54:12,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 658 transitions. [2020-10-09 17:54:12,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:54:12,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:54:12,847 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:54:12,847 INFO L185 Difference]: Start difference. First operand has 83 places, 60 transitions, 220 flow. Second operand 11 states and 658 transitions. [2020-10-09 17:54:12,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 73 transitions, 403 flow [2020-10-09 17:54:12,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 313 flow, removed 39 selfloop flow, removed 8 redundant places. [2020-10-09 17:54:12,858 INFO L241 Difference]: Finished difference. Result has 85 places, 60 transitions, 226 flow [2020-10-09 17:54:12,859 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=226, PETRI_PLACES=85, PETRI_TRANSITIONS=60} [2020-10-09 17:54:12,859 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 20 predicate places. [2020-10-09 17:54:12,859 INFO L481 AbstractCegarLoop]: Abstraction has has 85 places, 60 transitions, 226 flow [2020-10-09 17:54:12,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:54:12,860 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:54:12,860 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 17:54:13,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:54:13,072 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:54:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:54:13,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1988600493, now seen corresponding path program 1 times [2020-10-09 17:54:13,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:54:13,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850819125] [2020-10-09 17:54:13,075 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 17:54:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:54:13,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:54:13,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:54:13,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:13,173 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:13,210 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 17:54:13,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:54:13,258 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 17:54:13,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850819125] [2020-10-09 17:54:13,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:54:13,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2020-10-09 17:54:13,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424269066] [2020-10-09 17:54:13,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:54:13,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:54:13,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:54:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:54:13,534 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:54:13,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 60 transitions, 226 flow. Second operand 9 states. [2020-10-09 17:54:13,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:54:13,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:54:13,535 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:54:13,622 INFO L129 PetriNetUnfolder]: 11/115 cut-off events. [2020-10-09 17:54:13,623 INFO L130 PetriNetUnfolder]: For 114/124 co-relation queries the response was YES. [2020-10-09 17:54:13,624 INFO L80 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 115 events. 11/115 cut-off events. For 114/124 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 280 event pairs, 1 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 232. Up to 21 conditions per place. [2020-10-09 17:54:13,625 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 9 selfloop transitions, 2 changer transitions 5/65 dead transitions. [2020-10-09 17:54:13,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 65 transitions, 268 flow [2020-10-09 17:54:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 17:54:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-09 17:54:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 473 transitions. [2020-10-09 17:54:13,627 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8446428571428571 [2020-10-09 17:54:13,627 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 473 transitions. [2020-10-09 17:54:13,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 473 transitions. [2020-10-09 17:54:13,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:54:13,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 473 transitions. [2020-10-09 17:54:13,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-09 17:54:13,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-09 17:54:13,631 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-09 17:54:13,631 INFO L185 Difference]: Start difference. First operand has 85 places, 60 transitions, 226 flow. Second operand 8 states and 473 transitions. [2020-10-09 17:54:13,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 65 transitions, 268 flow [2020-10-09 17:54:13,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 65 transitions, 192 flow, removed 19 selfloop flow, removed 15 redundant places. [2020-10-09 17:54:13,635 INFO L241 Difference]: Finished difference. Result has 78 places, 60 transitions, 165 flow [2020-10-09 17:54:13,635 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=60} [2020-10-09 17:54:13,635 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 13 predicate places. [2020-10-09 17:54:13,636 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 60 transitions, 165 flow [2020-10-09 17:54:13,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:54:13,636 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:54:13,636 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 17:54:13,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:54:13,850 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:54:13,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:54:13,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1463406795, now seen corresponding path program 2 times [2020-10-09 17:54:13,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:54:13,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833479214] [2020-10-09 17:54:13,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 17:54:13,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:54:13,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:54:13,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:54:13,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:54:13,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:14,021 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 17:54:14,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:54:14,079 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 17:54:14,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833479214] [2020-10-09 17:54:14,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:54:14,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:54:14,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804072951] [2020-10-09 17:54:14,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:54:14,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:54:14,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:54:14,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:54:14,384 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 70 [2020-10-09 17:54:14,385 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 60 transitions, 165 flow. Second operand 9 states. [2020-10-09 17:54:14,385 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:54:14,385 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 70 [2020-10-09 17:54:14,385 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:54:14,462 INFO L129 PetriNetUnfolder]: 11/124 cut-off events. [2020-10-09 17:54:14,462 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-10-09 17:54:14,463 INFO L80 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 124 events. 11/124 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 337 event pairs, 0 based on Foata normal form. 1/122 useless extension candidates. Maximal degree in co-relation 191. Up to 14 conditions per place. [2020-10-09 17:54:14,464 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 10 selfloop transitions, 1 changer transitions 6/66 dead transitions. [2020-10-09 17:54:14,464 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 66 transitions, 223 flow [2020-10-09 17:54:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:54:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:54:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2020-10-09 17:54:14,466 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8510204081632653 [2020-10-09 17:54:14,466 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2020-10-09 17:54:14,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2020-10-09 17:54:14,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:54:14,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2020-10-09 17:54:14,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:54:14,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:54:14,470 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:54:14,470 INFO L185 Difference]: Start difference. First operand has 78 places, 60 transitions, 165 flow. Second operand 7 states and 417 transitions. [2020-10-09 17:54:14,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 66 transitions, 223 flow [2020-10-09 17:54:14,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 66 transitions, 205 flow, removed 7 selfloop flow, removed 6 redundant places. [2020-10-09 17:54:14,473 INFO L241 Difference]: Finished difference. Result has 79 places, 60 transitions, 167 flow [2020-10-09 17:54:14,474 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2020-10-09 17:54:14,488 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 14 predicate places. [2020-10-09 17:54:14,489 INFO L481 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 167 flow [2020-10-09 17:54:14,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:54:14,489 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:54:14,489 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 17:54:14,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 17:54:14,702 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:54:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:54:14,703 INFO L82 PathProgramCache]: Analyzing trace with hash 118028959, now seen corresponding path program 3 times [2020-10-09 17:54:14,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:54:14,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328772530] [2020-10-09 17:54:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-09 17:54:14,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-10-09 17:54:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:54:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:54:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:54:14,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:54:14,836 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 17:54:14,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:54:14,885 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 17:54:14,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328772530] [2020-10-09 17:54:14,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:54:14,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:54:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29589875] [2020-10-09 17:54:14,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:54:14,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:54:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:54:14,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:54:15,156 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2020-10-09 17:54:15,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 167 flow. Second operand 9 states. [2020-10-09 17:54:15,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:54:15,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2020-10-09 17:54:15,157 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:54:15,219 INFO L129 PetriNetUnfolder]: 7/92 cut-off events. [2020-10-09 17:54:15,220 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-09 17:54:15,220 INFO L80 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 92 events. 7/92 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 195 event pairs, 0 based on Foata normal form. 1/91 useless extension candidates. Maximal degree in co-relation 142. Up to 10 conditions per place. [2020-10-09 17:54:15,220 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2020-10-09 17:54:15,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 59 transitions, 183 flow [2020-10-09 17:54:15,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:54:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:54:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 417 transitions. [2020-10-09 17:54:15,222 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8510204081632653 [2020-10-09 17:54:15,222 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 417 transitions. [2020-10-09 17:54:15,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 417 transitions. [2020-10-09 17:54:15,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:54:15,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 417 transitions. [2020-10-09 17:54:15,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:54:15,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:54:15,225 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:54:15,225 INFO L185 Difference]: Start difference. First operand has 79 places, 60 transitions, 167 flow. Second operand 7 states and 417 transitions. [2020-10-09 17:54:15,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 59 transitions, 183 flow [2020-10-09 17:54:15,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 59 transitions, 173 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-09 17:54:15,227 INFO L241 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2020-10-09 17:54:15,227 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=68, 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=74, PETRI_TRANSITIONS=0} [2020-10-09 17:54:15,227 INFO L341 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2020-10-09 17:54:15,227 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2020-10-09 17:54:15,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:54:15,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-09 17:54:15,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:54:15 BasicIcfg [2020-10-09 17:54:15,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:54:15,445 INFO L168 Benchmark]: Toolchain (without parser) took 7918.95 ms. Allocated memory was 255.3 MB in the beginning and 426.8 MB in the end (delta: 171.4 MB). Free memory was 210.7 MB in the beginning and 312.4 MB in the end (delta: -101.7 MB). Peak memory consumption was 69.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:54:15,446 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 255.3 MB. Free memory is still 231.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:54:15,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 638.87 ms. Allocated memory was 255.3 MB in the beginning and 323.0 MB in the end (delta: 67.6 MB). Free memory was 210.7 MB in the beginning and 276.4 MB in the end (delta: -65.8 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:54:15,447 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.29 ms. Allocated memory is still 323.0 MB. Free memory was 276.4 MB in the beginning and 275.6 MB in the end (delta: 838.9 kB). Peak memory consumption was 838.9 kB. Max. memory is 14.2 GB. [2020-10-09 17:54:15,448 INFO L168 Benchmark]: Boogie Preprocessor took 32.46 ms. Allocated memory is still 323.0 MB. Free memory was 275.6 MB in the beginning and 273.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:54:15,449 INFO L168 Benchmark]: RCFGBuilder took 460.54 ms. Allocated memory is still 323.0 MB. Free memory was 273.1 MB in the beginning and 251.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:54:15,450 INFO L168 Benchmark]: TraceAbstraction took 6730.96 ms. Allocated memory was 323.0 MB in the beginning and 426.8 MB in the end (delta: 103.8 MB). Free memory was 248.7 MB in the beginning and 312.4 MB in the end (delta: -63.6 MB). Peak memory consumption was 40.2 MB. Max. memory is 14.2 GB. [2020-10-09 17:54:15,458 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 255.3 MB. Free memory is still 231.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 638.87 ms. Allocated memory was 255.3 MB in the beginning and 323.0 MB in the end (delta: 67.6 MB). Free memory was 210.7 MB in the beginning and 276.4 MB in the end (delta: -65.8 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 51.29 ms. Allocated memory is still 323.0 MB. Free memory was 276.4 MB in the beginning and 275.6 MB in the end (delta: 838.9 kB). Peak memory consumption was 838.9 kB. Max. memory is 14.2 GB. * Boogie Preprocessor took 32.46 ms. Allocated memory is still 323.0 MB. Free memory was 275.6 MB in the beginning and 273.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 460.54 ms. Allocated memory is still 323.0 MB. Free memory was 273.1 MB in the beginning and 251.3 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 6730.96 ms. Allocated memory was 323.0 MB in the beginning and 426.8 MB in the end (delta: 103.8 MB). Free memory was 248.7 MB in the beginning and 312.4 MB in the end (delta: -63.6 MB). Peak memory consumption was 40.2 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: 6.6s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 316 SDslu, 685 SDs, 0 SdLazy, 618 SolverSat, 104 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 722 GetRequests, 602 SyntacticMatches, 17 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=226occurred in iteration=5, 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: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 345 NumberOfCodeBlocks, 345 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 674 ConstructedInterpolants, 0 QuantifiedInterpolants, 79342 SizeOfPredicates, 68 NumberOfNonLiveVariables, 882 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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...