/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/safe028_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:56:22,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:56:22,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:56:22,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:56:22,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:56:22,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:56:22,184 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:56:22,186 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:56:22,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:56:22,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:56:22,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:56:22,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:56:22,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:56:22,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:56:22,193 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:56:22,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:56:22,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:56:22,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:56:22,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:56:22,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:56:22,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:56:22,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:56:22,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:56:22,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:56:22,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:56:22,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:56:22,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:56:22,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:56:22,209 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:56:22,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:56:22,210 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:56:22,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:56:22,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:56:22,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:56:22,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:56:22,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:56:22,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:56:22,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:56:22,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:56:22,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:56:22,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:56:22,223 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 17:56:22,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:56:22,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:56:22,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:56:22,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:56:22,268 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:56:22,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:56:22,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:56:22,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:56:22,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:56:22,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:56:22,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:56:22,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:56:22,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:56:22,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:56:22,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:56:22,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:56:22,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:56:22,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:56:22,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:56:22,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:56:22,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:56:22,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:56:22,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:56:22,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:56:22,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:56:22,273 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:56:22,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:56:22,274 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:56:22,274 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:56:22,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:56:22,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:56:22,599 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:56:22,602 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:56:22,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:56:22,603 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:56:22,604 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i [2020-10-09 17:56:22,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a834c76e2/52693b884dda44e4958d82bd192cc7e5/FLAG564028474 [2020-10-09 17:56:23,238 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:56:23,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i [2020-10-09 17:56:23,257 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a834c76e2/52693b884dda44e4958d82bd192cc7e5/FLAG564028474 [2020-10-09 17:56:23,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a834c76e2/52693b884dda44e4958d82bd192cc7e5 [2020-10-09 17:56:23,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:56:23,500 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:56:23,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:56:23,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:56:23,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:56:23,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:56:23" (1/1) ... [2020-10-09 17:56:23,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@122f49bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:23, skipping insertion in model container [2020-10-09 17:56:23,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:56:23" (1/1) ... [2020-10-09 17:56:23,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:56:23,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:56:24,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:56:24,029 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:56:24,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:56:24,151 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:56:24,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24 WrapperNode [2020-10-09 17:56:24,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:56:24,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:56:24,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:56:24,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:56:24,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:56:24,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:56:24,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:56:24,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:56:24,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (1/1) ... [2020-10-09 17:56:24,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:56:24,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:56:24,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:56:24,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:56:24,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (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 17:56:24,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:56:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:56:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:56:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:56:24,315 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:56:24,316 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:56:24,316 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:56:24,317 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:56:24,317 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:56:24,318 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:56:24,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:56:24,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:56:24,320 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 17:56:24,758 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:56:24,758 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:56:24,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:56:24 BoogieIcfgContainer [2020-10-09 17:56:24,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:56:24,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:56:24,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:56:24,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:56:24,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:56:23" (1/3) ... [2020-10-09 17:56:24,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9367a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:56:24, skipping insertion in model container [2020-10-09 17:56:24,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:56:24" (2/3) ... [2020-10-09 17:56:24,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c9367a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:56:24, skipping insertion in model container [2020-10-09 17:56:24,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:56:24" (3/3) ... [2020-10-09 17:56:24,772 INFO L111 eAbstractionObserver]: Analyzing ICFG safe028_tso.opt.i [2020-10-09 17:56:24,783 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:56:24,791 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:56:24,793 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:56:24,824 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,824 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,825 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,825 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,825 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,826 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,826 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,826 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,827 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,827 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,827 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,828 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,828 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,828 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,829 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,829 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,829 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,830 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,833 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,834 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,834 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,834 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,839 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,839 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,840 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,840 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,842 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,842 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,843 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,843 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:56:24,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:56:24,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:56:24,887 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:56:24,887 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:56:24,887 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:56:24,887 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:56:24,887 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:56:24,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:56:24,889 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:56:24,905 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 69 transitions, 153 flow [2020-10-09 17:56:24,965 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2020-10-09 17:56:24,966 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:56:24,972 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 66 events. 2/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2020-10-09 17:56:24,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 69 transitions, 153 flow [2020-10-09 17:56:24,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 55 transitions, 119 flow [2020-10-09 17:56:25,007 INFO L129 PetriNetUnfolder]: 1/54 cut-off events. [2020-10-09 17:56:25,007 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:56:25,008 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:56:25,009 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 17:56:25,009 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:56:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:56:25,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1749580001, now seen corresponding path program 1 times [2020-10-09 17:56:25,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:56:25,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106858751] [2020-10-09 17:56:25,029 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 17:56:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:56:25,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:56:25,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:56:25,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:56:25,332 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 17:56:25,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:56:25,404 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 17:56:25,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106858751] [2020-10-09 17:56:25,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:56:25,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:56:25,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737761017] [2020-10-09 17:56:25,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:56:25,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:56:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:56:25,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:56:25,701 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 69 [2020-10-09 17:56:25,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 119 flow. Second operand 8 states. [2020-10-09 17:56:25,704 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:56:25,704 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 69 [2020-10-09 17:56:25,706 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:56:25,813 INFO L129 PetriNetUnfolder]: 3/77 cut-off events. [2020-10-09 17:56:25,813 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:56:25,814 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 77 events. 3/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 4/80 useless extension candidates. Maximal degree in co-relation 82. Up to 7 conditions per place. [2020-10-09 17:56:25,816 INFO L132 encePairwiseOnDemand]: 62/69 looper letters, 6 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2020-10-09 17:56:25,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 173 flow [2020-10-09 17:56:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:56:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:56:25,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 553 transitions. [2020-10-09 17:56:25,835 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8904991948470209 [2020-10-09 17:56:25,836 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 553 transitions. [2020-10-09 17:56:25,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 553 transitions. [2020-10-09 17:56:25,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:56:25,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 553 transitions. [2020-10-09 17:56:25,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:56:25,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:56:25,856 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:56:25,858 INFO L185 Difference]: Start difference. First operand has 64 places, 55 transitions, 119 flow. Second operand 9 states and 553 transitions. [2020-10-09 17:56:25,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 173 flow [2020-10-09 17:56:25,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:56:25,868 INFO L241 Difference]: Finished difference. Result has 76 places, 53 transitions, 132 flow [2020-10-09 17:56:25,871 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=132, PETRI_PLACES=76, PETRI_TRANSITIONS=53} [2020-10-09 17:56:25,872 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 12 predicate places. [2020-10-09 17:56:25,872 INFO L481 AbstractCegarLoop]: Abstraction has has 76 places, 53 transitions, 132 flow [2020-10-09 17:56:25,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:56:25,872 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:56:25,873 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:56:26,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:56:26,084 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:56:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:56:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash 84477762, now seen corresponding path program 1 times [2020-10-09 17:56:26,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:56:26,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [489087920] [2020-10-09 17:56:26,088 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 17:56:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:56:26,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:56:26,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:56:26,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:56:26,214 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 17:56:26,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:56:26,269 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 17:56:26,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [489087920] [2020-10-09 17:56:26,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:56:26,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:56:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542626273] [2020-10-09 17:56:26,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:56:26,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:56:26,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:56:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:56:26,553 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 69 [2020-10-09 17:56:26,554 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 53 transitions, 132 flow. Second operand 9 states. [2020-10-09 17:56:26,554 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:56:26,554 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 69 [2020-10-09 17:56:26,554 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:56:26,676 INFO L129 PetriNetUnfolder]: 4/74 cut-off events. [2020-10-09 17:56:26,677 INFO L130 PetriNetUnfolder]: For 17/24 co-relation queries the response was YES. [2020-10-09 17:56:26,678 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 74 events. 4/74 cut-off events. For 17/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 117 event pairs, 0 based on Foata normal form. 2/76 useless extension candidates. Maximal degree in co-relation 121. Up to 7 conditions per place. [2020-10-09 17:56:26,678 INFO L132 encePairwiseOnDemand]: 61/69 looper letters, 6 selfloop transitions, 4 changer transitions 12/65 dead transitions. [2020-10-09 17:56:26,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 65 transitions, 223 flow [2020-10-09 17:56:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:56:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:56:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 594 transitions. [2020-10-09 17:56:26,681 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8608695652173913 [2020-10-09 17:56:26,682 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 594 transitions. [2020-10-09 17:56:26,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 594 transitions. [2020-10-09 17:56:26,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:56:26,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 594 transitions. [2020-10-09 17:56:26,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:56:26,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:56:26,686 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:56:26,686 INFO L185 Difference]: Start difference. First operand has 76 places, 53 transitions, 132 flow. Second operand 10 states and 594 transitions. [2020-10-09 17:56:26,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 65 transitions, 223 flow [2020-10-09 17:56:26,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 65 transitions, 189 flow, removed 14 selfloop flow, removed 8 redundant places. [2020-10-09 17:56:26,690 INFO L241 Difference]: Finished difference. Result has 78 places, 53 transitions, 146 flow [2020-10-09 17:56:26,690 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=146, PETRI_PLACES=78, PETRI_TRANSITIONS=53} [2020-10-09 17:56:26,691 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 14 predicate places. [2020-10-09 17:56:26,691 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 53 transitions, 146 flow [2020-10-09 17:56:26,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:56:26,692 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:56:26,692 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 17:56:26,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:56:26,904 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:56:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:56:26,905 INFO L82 PathProgramCache]: Analyzing trace with hash -784081567, now seen corresponding path program 1 times [2020-10-09 17:56:26,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:56:26,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793779606] [2020-10-09 17:56:26,908 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 17:56:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:56:26,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:56:26,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:56:26,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:56:26,996 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 17:56:26,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:56:27,030 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 17:56:27,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793779606] [2020-10-09 17:56:27,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:56:27,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:56:27,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594569030] [2020-10-09 17:56:27,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:56:27,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:56:27,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:56:27,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:56:27,143 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 69 [2020-10-09 17:56:27,143 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 53 transitions, 146 flow. Second operand 8 states. [2020-10-09 17:56:27,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:56:27,144 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 69 [2020-10-09 17:56:27,144 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:56:27,319 INFO L129 PetriNetUnfolder]: 64/222 cut-off events. [2020-10-09 17:56:27,319 INFO L130 PetriNetUnfolder]: For 29/29 co-relation queries the response was YES. [2020-10-09 17:56:27,321 INFO L80 FinitePrefix]: Finished finitePrefix Result has 409 conditions, 222 events. 64/222 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 949 event pairs, 0 based on Foata normal form. 8/225 useless extension candidates. Maximal degree in co-relation 381. Up to 36 conditions per place. [2020-10-09 17:56:27,323 INFO L132 encePairwiseOnDemand]: 60/69 looper letters, 10 selfloop transitions, 9 changer transitions 29/91 dead transitions. [2020-10-09 17:56:27,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 91 transitions, 318 flow [2020-10-09 17:56:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:56:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:56:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 723 transitions. [2020-10-09 17:56:27,326 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8731884057971014 [2020-10-09 17:56:27,326 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 723 transitions. [2020-10-09 17:56:27,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 723 transitions. [2020-10-09 17:56:27,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:56:27,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 723 transitions. [2020-10-09 17:56:27,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:56:27,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:56:27,331 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:56:27,331 INFO L185 Difference]: Start difference. First operand has 78 places, 53 transitions, 146 flow. Second operand 12 states and 723 transitions. [2020-10-09 17:56:27,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 91 transitions, 318 flow [2020-10-09 17:56:27,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 292 flow, removed 8 selfloop flow, removed 10 redundant places. [2020-10-09 17:56:27,336 INFO L241 Difference]: Finished difference. Result has 82 places, 59 transitions, 218 flow [2020-10-09 17:56:27,337 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=218, PETRI_PLACES=82, PETRI_TRANSITIONS=59} [2020-10-09 17:56:27,337 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 18 predicate places. [2020-10-09 17:56:27,337 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 59 transitions, 218 flow [2020-10-09 17:56:27,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:56:27,337 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:56:27,338 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] [2020-10-09 17:56:27,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:56:27,550 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:56:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:56:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1254214100, now seen corresponding path program 1 times [2020-10-09 17:56:27,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:56:27,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657990288] [2020-10-09 17:56:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 17:56:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:56:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:56:27,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:56:27,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:56:27,689 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 17:56:27,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:56:27,731 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 17:56:27,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657990288] [2020-10-09 17:56:27,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:56:27,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:56:27,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657755861] [2020-10-09 17:56:27,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:56:27,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:56:27,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:56:27,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:56:27,835 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 69 [2020-10-09 17:56:27,836 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 59 transitions, 218 flow. Second operand 10 states. [2020-10-09 17:56:27,836 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:56:27,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 69 [2020-10-09 17:56:27,836 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:56:27,998 INFO L129 PetriNetUnfolder]: 16/99 cut-off events. [2020-10-09 17:56:27,998 INFO L130 PetriNetUnfolder]: For 336/359 co-relation queries the response was YES. [2020-10-09 17:56:28,004 INFO L80 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 99 events. 16/99 cut-off events. For 336/359 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 213 event pairs, 0 based on Foata normal form. 14/112 useless extension candidates. Maximal degree in co-relation 294. Up to 27 conditions per place. [2020-10-09 17:56:28,005 INFO L132 encePairwiseOnDemand]: 60/69 looper letters, 4 selfloop transitions, 12 changer transitions 13/72 dead transitions. [2020-10-09 17:56:28,005 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 72 transitions, 401 flow [2020-10-09 17:56:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:56:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:56:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 647 transitions. [2020-10-09 17:56:28,012 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.852437417654809 [2020-10-09 17:56:28,012 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 647 transitions. [2020-10-09 17:56:28,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 647 transitions. [2020-10-09 17:56:28,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:56:28,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 647 transitions. [2020-10-09 17:56:28,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:56:28,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:56:28,017 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:56:28,018 INFO L185 Difference]: Start difference. First operand has 82 places, 59 transitions, 218 flow. Second operand 11 states and 647 transitions. [2020-10-09 17:56:28,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 72 transitions, 401 flow [2020-10-09 17:56:28,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 311 flow, removed 39 selfloop flow, removed 8 redundant places. [2020-10-09 17:56:28,025 INFO L241 Difference]: Finished difference. Result has 84 places, 59 transitions, 224 flow [2020-10-09 17:56:28,025 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=224, PETRI_PLACES=84, PETRI_TRANSITIONS=59} [2020-10-09 17:56:28,025 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 20 predicate places. [2020-10-09 17:56:28,026 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 59 transitions, 224 flow [2020-10-09 17:56:28,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:56:28,027 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:56:28,027 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] [2020-10-09 17:56:28,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:56:28,239 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:56:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:56:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1634746376, now seen corresponding path program 1 times [2020-10-09 17:56:28,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:56:28,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038322035] [2020-10-09 17:56:28,242 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 17:56:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:56:28,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:56:28,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:56:28,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:56:28,355 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 17:56:28,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:56:28,405 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 17:56:28,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038322035] [2020-10-09 17:56:28,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:56:28,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:56:28,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605672943] [2020-10-09 17:56:28,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:56:28,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:56:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:56:28,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:56:28,772 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 69 [2020-10-09 17:56:28,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 59 transitions, 224 flow. Second operand 9 states. [2020-10-09 17:56:28,773 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:56:28,773 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 69 [2020-10-09 17:56:28,773 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:56:28,866 INFO L129 PetriNetUnfolder]: 10/109 cut-off events. [2020-10-09 17:56:28,866 INFO L130 PetriNetUnfolder]: For 115/127 co-relation queries the response was YES. [2020-10-09 17:56:28,867 INFO L80 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 109 events. 10/109 cut-off events. For 115/127 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 257 event pairs, 0 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 220. Up to 21 conditions per place. [2020-10-09 17:56:28,868 INFO L132 encePairwiseOnDemand]: 63/69 looper letters, 9 selfloop transitions, 1 changer transitions 5/64 dead transitions. [2020-10-09 17:56:28,868 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 64 transitions, 264 flow [2020-10-09 17:56:28,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:56:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:56:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 415 transitions. [2020-10-09 17:56:28,873 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8592132505175983 [2020-10-09 17:56:28,874 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 415 transitions. [2020-10-09 17:56:28,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 415 transitions. [2020-10-09 17:56:28,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:56:28,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 415 transitions. [2020-10-09 17:56:28,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:56:28,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:56:28,877 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:56:28,877 INFO L185 Difference]: Start difference. First operand has 84 places, 59 transitions, 224 flow. Second operand 7 states and 415 transitions. [2020-10-09 17:56:28,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 64 transitions, 264 flow [2020-10-09 17:56:28,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 64 transitions, 188 flow, removed 19 selfloop flow, removed 15 redundant places. [2020-10-09 17:56:28,887 INFO L241 Difference]: Finished difference. Result has 76 places, 59 transitions, 161 flow [2020-10-09 17:56:28,887 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2020-10-09 17:56:28,887 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 12 predicate places. [2020-10-09 17:56:28,888 INFO L481 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 161 flow [2020-10-09 17:56:28,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:56:28,888 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:56:28,888 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] [2020-10-09 17:56:29,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:56:29,089 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:56:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:56:29,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1949655638, now seen corresponding path program 2 times [2020-10-09 17:56:29,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:56:29,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342702892] [2020-10-09 17:56:29,090 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 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 17:56:29,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:56:29,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:56:29,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:56:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:56:29,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:56:29,213 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 17:56:29,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:56:29,254 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 17:56:29,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342702892] [2020-10-09 17:56:29,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:56:29,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:56:29,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831953200] [2020-10-09 17:56:29,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:56:29,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:56:29,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:56:29,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:56:29,461 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 69 [2020-10-09 17:56:29,461 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 161 flow. Second operand 9 states. [2020-10-09 17:56:29,462 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:56:29,462 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 69 [2020-10-09 17:56:29,462 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:56:29,521 INFO L129 PetriNetUnfolder]: 7/90 cut-off events. [2020-10-09 17:56:29,522 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-09 17:56:29,522 INFO L80 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 90 events. 7/90 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 192 event pairs, 0 based on Foata normal form. 1/88 useless extension candidates. Maximal degree in co-relation 137. Up to 10 conditions per place. [2020-10-09 17:56:29,522 INFO L132 encePairwiseOnDemand]: 63/69 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2020-10-09 17:56:29,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 58 transitions, 177 flow [2020-10-09 17:56:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:56:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:56:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2020-10-09 17:56:29,525 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8488612836438924 [2020-10-09 17:56:29,525 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2020-10-09 17:56:29,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2020-10-09 17:56:29,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:56:29,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2020-10-09 17:56:29,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:56:29,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:56:29,528 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:56:29,528 INFO L185 Difference]: Start difference. First operand has 76 places, 59 transitions, 161 flow. Second operand 7 states and 410 transitions. [2020-10-09 17:56:29,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 58 transitions, 177 flow [2020-10-09 17:56:29,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 58 transitions, 170 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-09 17:56:29,530 INFO L241 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2020-10-09 17:56:29,530 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2020-10-09 17:56:29,531 INFO L341 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2020-10-09 17:56:29,531 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2020-10-09 17:56:29,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:56:29,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:56:29,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:56:29 BasicIcfg [2020-10-09 17:56:29,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:56:29,753 INFO L168 Benchmark]: Toolchain (without parser) took 6252.81 ms. Allocated memory was 252.7 MB in the beginning and 421.5 MB in the end (delta: 168.8 MB). Free memory was 207.9 MB in the beginning and 265.9 MB in the end (delta: -58.0 MB). Peak memory consumption was 110.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:56:29,754 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:56:29,755 INFO L168 Benchmark]: CACSL2BoogieTranslator took 650.55 ms. Allocated memory was 252.7 MB in the beginning and 317.7 MB in the end (delta: 65.0 MB). Free memory was 207.9 MB in the beginning and 271.0 MB in the end (delta: -63.1 MB). Peak memory consumption was 29.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:56:29,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.44 ms. Allocated memory is still 317.7 MB. Free memory was 271.0 MB in the beginning and 268.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:56:29,757 INFO L168 Benchmark]: Boogie Preprocessor took 28.42 ms. Allocated memory is still 317.7 MB. Free memory was 268.5 MB in the beginning and 266.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:56:29,758 INFO L168 Benchmark]: RCFGBuilder took 529.69 ms. Allocated memory is still 317.7 MB. Free memory was 266.0 MB in the beginning and 244.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:56:29,759 INFO L168 Benchmark]: TraceAbstraction took 4988.14 ms. Allocated memory was 317.7 MB in the beginning and 421.5 MB in the end (delta: 103.8 MB). Free memory was 244.1 MB in the beginning and 265.9 MB in the end (delta: -21.7 MB). Peak memory consumption was 82.1 MB. Max. memory is 14.2 GB. [2020-10-09 17:56:29,763 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 252.7 MB. Free memory is still 229.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 650.55 ms. Allocated memory was 252.7 MB in the beginning and 317.7 MB in the end (delta: 65.0 MB). Free memory was 207.9 MB in the beginning and 271.0 MB in the end (delta: -63.1 MB). Peak memory consumption was 29.5 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 49.44 ms. Allocated memory is still 317.7 MB. Free memory was 271.0 MB in the beginning and 268.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.42 ms. Allocated memory is still 317.7 MB. Free memory was 268.5 MB in the beginning and 266.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 529.69 ms. Allocated memory is still 317.7 MB. Free memory was 266.0 MB in the beginning and 244.1 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4988.14 ms. Allocated memory was 317.7 MB in the beginning and 421.5 MB in the end (delta: 103.8 MB). Free memory was 244.1 MB in the beginning and 265.9 MB in the end (delta: -21.7 MB). Peak memory consumption was 82.1 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, 68 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 253 SDslu, 551 SDs, 0 SdLazy, 477 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 525 GetRequests, 436 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=224occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 251 NumberOfCodeBlocks, 251 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 490 ConstructedInterpolants, 0 QuantifiedInterpolants, 49784 SizeOfPredicates, 41 NumberOfNonLiveVariables, 644 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...