/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/safe026_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 17:55:09,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 17:55:09,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 17:55:09,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 17:55:09,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 17:55:09,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 17:55:09,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 17:55:09,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 17:55:09,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 17:55:09,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 17:55:09,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 17:55:09,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 17:55:09,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 17:55:09,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 17:55:09,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 17:55:09,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 17:55:09,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 17:55:09,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 17:55:09,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 17:55:09,240 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 17:55:09,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 17:55:09,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 17:55:09,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 17:55:09,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 17:55:09,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 17:55:09,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 17:55:09,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 17:55:09,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 17:55:09,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 17:55:09,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 17:55:09,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 17:55:09,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 17:55:09,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 17:55:09,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 17:55:09,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 17:55:09,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 17:55:09,253 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 17:55:09,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 17:55:09,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 17:55:09,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 17:55:09,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 17:55:09,256 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 17:55:09,277 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 17:55:09,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 17:55:09,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 17:55:09,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 17:55:09,279 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 17:55:09,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 17:55:09,279 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 17:55:09,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 17:55:09,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 17:55:09,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 17:55:09,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 17:55:09,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 17:55:09,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 17:55:09,281 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 17:55:09,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 17:55:09,281 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 17:55:09,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 17:55:09,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 17:55:09,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 17:55:09,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 17:55:09,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 17:55:09,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 17:55:09,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 17:55:09,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 17:55:09,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 17:55:09,283 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 17:55:09,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 17:55:09,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 17:55:09,284 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 17:55:09,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 17:55:09,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 17:55:09,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 17:55:09,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 17:55:09,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 17:55:09,595 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 17:55:09,596 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.opt.i [2020-10-09 17:55:09,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c404b33/00849c04fa7c48449945aa21174ac3de/FLAG57c937f93 [2020-10-09 17:55:10,179 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 17:55:10,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe026_tso.opt.i [2020-10-09 17:55:10,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c404b33/00849c04fa7c48449945aa21174ac3de/FLAG57c937f93 [2020-10-09 17:55:10,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8c404b33/00849c04fa7c48449945aa21174ac3de [2020-10-09 17:55:10,471 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 17:55:10,473 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 17:55:10,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 17:55:10,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 17:55:10,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 17:55:10,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:55:10" (1/1) ... [2020-10-09 17:55:10,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@230290f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:10, skipping insertion in model container [2020-10-09 17:55:10,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 05:55:10" (1/1) ... [2020-10-09 17:55:10,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 17:55:10,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 17:55:10,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:55:10,913 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 17:55:11,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 17:55:11,135 INFO L208 MainTranslator]: Completed translation [2020-10-09 17:55:11,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11 WrapperNode [2020-10-09 17:55:11,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 17:55:11,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 17:55:11,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 17:55:11,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 17:55:11,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 17:55:11,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 17:55:11,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 17:55:11,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 17:55:11,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (1/1) ... [2020-10-09 17:55:11,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 17:55:11,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 17:55:11,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 17:55:11,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 17:55:11,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (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 17:55:11,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 17:55:11,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 17:55:11,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 17:55:11,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 17:55:11,282 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-09 17:55:11,282 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-09 17:55:11,283 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-09 17:55:11,283 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-09 17:55:11,284 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-09 17:55:11,284 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-09 17:55:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 17:55:11,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 17:55:11,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 17:55:11,288 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 17:55:11,650 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 17:55:11,650 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-09 17:55:11,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:55:11 BoogieIcfgContainer [2020-10-09 17:55:11,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 17:55:11,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 17:55:11,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 17:55:11,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 17:55:11,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 05:55:10" (1/3) ... [2020-10-09 17:55:11,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c41643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:55:11, skipping insertion in model container [2020-10-09 17:55:11,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 05:55:11" (2/3) ... [2020-10-09 17:55:11,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c41643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 05:55:11, skipping insertion in model container [2020-10-09 17:55:11,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 05:55:11" (3/3) ... [2020-10-09 17:55:11,660 INFO L111 eAbstractionObserver]: Analyzing ICFG safe026_tso.opt.i [2020-10-09 17:55:11,678 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 17:55:11,685 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 17:55:11,686 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 17:55:11,709 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,710 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,710 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,710 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,711 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,711 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,711 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,712 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,712 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,712 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,712 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,713 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,713 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,713 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,714 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,714 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,714 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,715 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,718 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,719 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,719 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,719 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,724 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,724 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,724 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,725 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,729 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,730 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,730 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,730 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 17:55:11,748 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 17:55:11,769 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 17:55:11,769 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 17:55:11,769 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 17:55:11,770 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 17:55:11,770 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 17:55:11,770 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 17:55:11,770 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 17:55:11,771 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 17:55:11,784 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 76 places, 68 transitions, 151 flow [2020-10-09 17:55:11,821 INFO L129 PetriNetUnfolder]: 2/65 cut-off events. [2020-10-09 17:55:11,821 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:55:11,826 INFO L80 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 65 events. 2/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2020-10-09 17:55:11,827 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 68 transitions, 151 flow [2020-10-09 17:55:11,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 54 transitions, 117 flow [2020-10-09 17:55:11,853 INFO L129 PetriNetUnfolder]: 1/53 cut-off events. [2020-10-09 17:55:11,853 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:55:11,853 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:11,854 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] [2020-10-09 17:55:11,855 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1418646987, now seen corresponding path program 1 times [2020-10-09 17:55:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:11,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444990375] [2020-10-09 17:55:11,873 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 17:55:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:55:11,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:12,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:12,105 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 17:55:12,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:12,171 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 17:55:12,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444990375] [2020-10-09 17:55:12,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:12,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:55:12,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833550823] [2020-10-09 17:55:12,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:55:12,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:55:12,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:55:12,370 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 68 [2020-10-09 17:55:12,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 117 flow. Second operand 8 states. [2020-10-09 17:55:12,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:12,374 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 68 [2020-10-09 17:55:12,375 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:12,512 INFO L129 PetriNetUnfolder]: 3/76 cut-off events. [2020-10-09 17:55:12,513 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 17:55:12,513 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 76 events. 3/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 115 event pairs, 0 based on Foata normal form. 4/79 useless extension candidates. Maximal degree in co-relation 82. Up to 7 conditions per place. [2020-10-09 17:55:12,515 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 6 selfloop transitions, 2 changer transitions 11/63 dead transitions. [2020-10-09 17:55:12,515 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 171 flow [2020-10-09 17:55:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 17:55:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-09 17:55:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 544 transitions. [2020-10-09 17:55:12,534 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8888888888888888 [2020-10-09 17:55:12,535 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 544 transitions. [2020-10-09 17:55:12,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 544 transitions. [2020-10-09 17:55:12,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:12,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 544 transitions. [2020-10-09 17:55:12,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-09 17:55:12,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-09 17:55:12,555 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-09 17:55:12,557 INFO L185 Difference]: Start difference. First operand has 63 places, 54 transitions, 117 flow. Second operand 9 states and 544 transitions. [2020-10-09 17:55:12,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 171 flow [2020-10-09 17:55:12,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 17:55:12,567 INFO L241 Difference]: Finished difference. Result has 75 places, 52 transitions, 130 flow [2020-10-09 17:55:12,570 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=130, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2020-10-09 17:55:12,571 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2020-10-09 17:55:12,571 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 130 flow [2020-10-09 17:55:12,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:55:12,572 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:12,572 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] [2020-10-09 17:55:12,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 17:55:12,783 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash 200908524, now seen corresponding path program 1 times [2020-10-09 17:55:12,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:12,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283114863] [2020-10-09 17:55:12,785 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 17:55:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:12,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 17:55:12,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:12,862 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:12,906 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 17:55:12,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:12,968 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 17:55:12,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283114863] [2020-10-09 17:55:12,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:12,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:55:12,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576565224] [2020-10-09 17:55:12,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:55:12,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:55:12,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:55:13,136 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 68 [2020-10-09 17:55:13,137 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 130 flow. Second operand 8 states. [2020-10-09 17:55:13,137 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:13,137 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 68 [2020-10-09 17:55:13,137 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:13,293 INFO L129 PetriNetUnfolder]: 18/136 cut-off events. [2020-10-09 17:55:13,293 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2020-10-09 17:55:13,294 INFO L80 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 136 events. 18/136 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 486 event pairs, 0 based on Foata normal form. 5/139 useless extension candidates. Maximal degree in co-relation 228. Up to 15 conditions per place. [2020-10-09 17:55:13,295 INFO L132 encePairwiseOnDemand]: 61/68 looper letters, 10 selfloop transitions, 5 changer transitions 23/81 dead transitions. [2020-10-09 17:55:13,295 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 81 transitions, 304 flow [2020-10-09 17:55:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 17:55:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-09 17:55:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 782 transitions. [2020-10-09 17:55:13,299 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8846153846153846 [2020-10-09 17:55:13,299 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 782 transitions. [2020-10-09 17:55:13,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 782 transitions. [2020-10-09 17:55:13,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:13,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 782 transitions. [2020-10-09 17:55:13,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-09 17:55:13,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-09 17:55:13,305 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-09 17:55:13,305 INFO L185 Difference]: Start difference. First operand has 75 places, 52 transitions, 130 flow. Second operand 13 states and 782 transitions. [2020-10-09 17:55:13,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 81 transitions, 304 flow [2020-10-09 17:55:13,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 252 flow, removed 24 selfloop flow, removed 8 redundant places. [2020-10-09 17:55:13,310 INFO L241 Difference]: Finished difference. Result has 83 places, 54 transitions, 156 flow [2020-10-09 17:55:13,311 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=156, PETRI_PLACES=83, PETRI_TRANSITIONS=54} [2020-10-09 17:55:13,311 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2020-10-09 17:55:13,311 INFO L481 AbstractCegarLoop]: Abstraction has has 83 places, 54 transitions, 156 flow [2020-10-09 17:55:13,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:55:13,312 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:13,312 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 17:55:13,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 17:55:13,527 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash -694700115, now seen corresponding path program 1 times [2020-10-09 17:55:13,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:13,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064790141] [2020-10-09 17:55:13,528 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 17:55:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:13,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 17:55:13,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:13,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:13,622 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 17:55:13,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:13,645 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 17:55:13,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064790141] [2020-10-09 17:55:13,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:13,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-10-09 17:55:13,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251130781] [2020-10-09 17:55:13,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 17:55:13,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:13,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 17:55:13,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-09 17:55:13,808 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2020-10-09 17:55:13,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 54 transitions, 156 flow. Second operand 8 states. [2020-10-09 17:55:13,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:13,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2020-10-09 17:55:13,810 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:14,032 INFO L129 PetriNetUnfolder]: 124/343 cut-off events. [2020-10-09 17:55:14,033 INFO L130 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2020-10-09 17:55:14,036 INFO L80 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 343 events. 124/343 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1859 event pairs, 0 based on Foata normal form. 14/333 useless extension candidates. Maximal degree in co-relation 635. Up to 72 conditions per place. [2020-10-09 17:55:14,037 INFO L132 encePairwiseOnDemand]: 59/68 looper letters, 10 selfloop transitions, 9 changer transitions 29/92 dead transitions. [2020-10-09 17:55:14,037 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 92 transitions, 328 flow [2020-10-09 17:55:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 17:55:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-09 17:55:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 711 transitions. [2020-10-09 17:55:14,040 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8713235294117647 [2020-10-09 17:55:14,041 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 711 transitions. [2020-10-09 17:55:14,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 711 transitions. [2020-10-09 17:55:14,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:14,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 711 transitions. [2020-10-09 17:55:14,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-09 17:55:14,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-09 17:55:14,045 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-09 17:55:14,045 INFO L185 Difference]: Start difference. First operand has 83 places, 54 transitions, 156 flow. Second operand 12 states and 711 transitions. [2020-10-09 17:55:14,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 92 transitions, 328 flow [2020-10-09 17:55:14,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 92 transitions, 305 flow, removed 10 selfloop flow, removed 10 redundant places. [2020-10-09 17:55:14,051 INFO L241 Difference]: Finished difference. Result has 84 places, 60 transitions, 231 flow [2020-10-09 17:55:14,051 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=64, 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=231, PETRI_PLACES=84, PETRI_TRANSITIONS=60} [2020-10-09 17:55:14,051 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 21 predicate places. [2020-10-09 17:55:14,052 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 60 transitions, 231 flow [2020-10-09 17:55:14,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 17:55:14,052 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:14,052 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] [2020-10-09 17:55:14,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 17:55:14,265 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 28977558, now seen corresponding path program 1 times [2020-10-09 17:55:14,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:14,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214593229] [2020-10-09 17:55:14,267 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 17:55:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:14,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 17:55:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:14,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:14,384 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 17:55:14,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:14,430 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 17:55:14,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1214593229] [2020-10-09 17:55:14,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:14,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2020-10-09 17:55:14,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447443712] [2020-10-09 17:55:14,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:55:14,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:55:14,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:55:14,536 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2020-10-09 17:55:14,537 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 60 transitions, 231 flow. Second operand 10 states. [2020-10-09 17:55:14,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:14,538 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2020-10-09 17:55:14,538 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:14,702 INFO L129 PetriNetUnfolder]: 32/157 cut-off events. [2020-10-09 17:55:14,703 INFO L130 PetriNetUnfolder]: For 612/686 co-relation queries the response was YES. [2020-10-09 17:55:14,704 INFO L80 FinitePrefix]: Finished finitePrefix Result has 574 conditions, 157 events. 32/157 cut-off events. For 612/686 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 584 event pairs, 0 based on Foata normal form. 22/173 useless extension candidates. Maximal degree in co-relation 541. Up to 53 conditions per place. [2020-10-09 17:55:14,705 INFO L132 encePairwiseOnDemand]: 59/68 looper letters, 4 selfloop transitions, 12 changer transitions 15/73 dead transitions. [2020-10-09 17:55:14,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 73 transitions, 414 flow [2020-10-09 17:55:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 17:55:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-09 17:55:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 636 transitions. [2020-10-09 17:55:14,709 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8502673796791443 [2020-10-09 17:55:14,709 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 636 transitions. [2020-10-09 17:55:14,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 636 transitions. [2020-10-09 17:55:14,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:14,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 636 transitions. [2020-10-09 17:55:14,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-09 17:55:14,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-09 17:55:14,714 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-09 17:55:14,714 INFO L185 Difference]: Start difference. First operand has 84 places, 60 transitions, 231 flow. Second operand 11 states and 636 transitions. [2020-10-09 17:55:14,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 73 transitions, 414 flow [2020-10-09 17:55:14,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 324 flow, removed 39 selfloop flow, removed 8 redundant places. [2020-10-09 17:55:14,720 INFO L241 Difference]: Finished difference. Result has 86 places, 58 transitions, 228 flow [2020-10-09 17:55:14,720 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=70, 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=228, PETRI_PLACES=86, PETRI_TRANSITIONS=58} [2020-10-09 17:55:14,720 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2020-10-09 17:55:14,721 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 58 transitions, 228 flow [2020-10-09 17:55:14,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:55:14,721 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:14,721 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] [2020-10-09 17:55:14,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 17:55:14,933 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:14,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:14,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1862178320, now seen corresponding path program 1 times [2020-10-09 17:55:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:14,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100054689] [2020-10-09 17:55:14,934 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 17:55:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 17:55:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:55:14,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:15,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:15,042 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 17:55:15,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:15,097 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 17:55:15,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100054689] [2020-10-09 17:55:15,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:15,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2020-10-09 17:55:15,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097619924] [2020-10-09 17:55:15,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 17:55:15,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:15,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 17:55:15,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-09 17:55:15,264 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 68 [2020-10-09 17:55:15,264 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 58 transitions, 228 flow. Second operand 9 states. [2020-10-09 17:55:15,265 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:15,265 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 68 [2020-10-09 17:55:15,265 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:15,353 INFO L129 PetriNetUnfolder]: 10/108 cut-off events. [2020-10-09 17:55:15,353 INFO L130 PetriNetUnfolder]: For 117/127 co-relation queries the response was YES. [2020-10-09 17:55:15,354 INFO L80 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 108 events. 10/108 cut-off events. For 117/127 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 259 event pairs, 0 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 226. Up to 21 conditions per place. [2020-10-09 17:55:15,354 INFO L132 encePairwiseOnDemand]: 62/68 looper letters, 9 selfloop transitions, 1 changer transitions 5/63 dead transitions. [2020-10-09 17:55:15,355 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 63 transitions, 270 flow [2020-10-09 17:55:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 17:55:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-09 17:55:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 408 transitions. [2020-10-09 17:55:15,357 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8571428571428571 [2020-10-09 17:55:15,357 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 408 transitions. [2020-10-09 17:55:15,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 408 transitions. [2020-10-09 17:55:15,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:15,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 408 transitions. [2020-10-09 17:55:15,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-09 17:55:15,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-09 17:55:15,360 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-09 17:55:15,360 INFO L185 Difference]: Start difference. First operand has 86 places, 58 transitions, 228 flow. Second operand 7 states and 408 transitions. [2020-10-09 17:55:15,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 63 transitions, 270 flow [2020-10-09 17:55:15,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 63 transitions, 184 flow, removed 21 selfloop flow, removed 18 redundant places. [2020-10-09 17:55:15,363 INFO L241 Difference]: Finished difference. Result has 75 places, 58 transitions, 157 flow [2020-10-09 17:55:15,364 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=157, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2020-10-09 17:55:15,364 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 12 predicate places. [2020-10-09 17:55:15,364 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 157 flow [2020-10-09 17:55:15,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 17:55:15,364 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 17:55:15,364 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] [2020-10-09 17:55:15,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 17:55:15,578 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 17:55:15,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 17:55:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash 57353760, now seen corresponding path program 2 times [2020-10-09 17:55:15,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 17:55:15,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196487090] [2020-10-09 17:55:15,580 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 17:55:15,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-09 17:55:15,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 17:55:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 17:55:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 17:55:15,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 17:55:15,686 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 17:55:15,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 17:55:15,758 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 17:55:15,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196487090] [2020-10-09 17:55:15,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 17:55:15,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2020-10-09 17:55:15,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408228028] [2020-10-09 17:55:15,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 17:55:15,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 17:55:15,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 17:55:15,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-09 17:55:15,978 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 68 [2020-10-09 17:55:15,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 157 flow. Second operand 10 states. [2020-10-09 17:55:15,979 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 17:55:15,979 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 68 [2020-10-09 17:55:15,979 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 17:55:16,075 INFO L129 PetriNetUnfolder]: 8/102 cut-off events. [2020-10-09 17:55:16,075 INFO L130 PetriNetUnfolder]: For 5/6 co-relation queries the response was YES. [2020-10-09 17:55:16,076 INFO L80 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 102 events. 8/102 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 274 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 158. Up to 12 conditions per place. [2020-10-09 17:55:16,080 INFO L132 encePairwiseOnDemand]: 59/68 looper letters, 0 selfloop transitions, 0 changer transitions 59/59 dead transitions. [2020-10-09 17:55:16,080 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 184 flow [2020-10-09 17:55:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 17:55:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 17:55:16,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 564 transitions. [2020-10-09 17:55:16,083 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8294117647058824 [2020-10-09 17:55:16,083 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 564 transitions. [2020-10-09 17:55:16,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 564 transitions. [2020-10-09 17:55:16,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 17:55:16,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 564 transitions. [2020-10-09 17:55:16,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 17:55:16,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 17:55:16,088 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 17:55:16,088 INFO L185 Difference]: Start difference. First operand has 75 places, 58 transitions, 157 flow. Second operand 10 states and 564 transitions. [2020-10-09 17:55:16,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 184 flow [2020-10-09 17:55:16,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 59 transitions, 177 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-09 17:55:16,091 INFO L241 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2020-10-09 17:55:16,091 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2020-10-09 17:55:16,092 INFO L341 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2020-10-09 17:55:16,094 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2020-10-09 17:55:16,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 17:55:16,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 17:55:16,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 05:55:16 BasicIcfg [2020-10-09 17:55:16,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 17:55:16,323 INFO L168 Benchmark]: Toolchain (without parser) took 5848.96 ms. Allocated memory was 252.2 MB in the beginning and 426.8 MB in the end (delta: 174.6 MB). Free memory was 207.3 MB in the beginning and 301.0 MB in the end (delta: -93.7 MB). Peak memory consumption was 80.9 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:16,324 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 17:55:16,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.13 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 207.3 MB in the beginning and 271.5 MB in the end (delta: -64.2 MB). Peak memory consumption was 33.4 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:16,330 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.45 ms. Allocated memory is still 316.7 MB. Free memory was 271.5 MB in the beginning and 269.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:16,331 INFO L168 Benchmark]: Boogie Preprocessor took 25.50 ms. Allocated memory is still 316.7 MB. Free memory was 269.0 MB in the beginning and 266.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:16,331 INFO L168 Benchmark]: RCFGBuilder took 441.08 ms. Allocated memory is still 316.7 MB. Free memory was 266.5 MB in the beginning and 244.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:16,332 INFO L168 Benchmark]: TraceAbstraction took 4666.58 ms. Allocated memory was 316.7 MB in the beginning and 426.8 MB in the end (delta: 110.1 MB). Free memory was 244.6 MB in the beginning and 301.0 MB in the end (delta: -56.4 MB). Peak memory consumption was 53.7 MB. Max. memory is 14.2 GB. [2020-10-09 17:55:16,338 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 662.13 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 207.3 MB in the beginning and 271.5 MB in the end (delta: -64.2 MB). Peak memory consumption was 33.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.45 ms. Allocated memory is still 316.7 MB. Free memory was 271.5 MB in the beginning and 269.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 25.50 ms. Allocated memory is still 316.7 MB. Free memory was 269.0 MB in the beginning and 266.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 441.08 ms. Allocated memory is still 316.7 MB. Free memory was 266.5 MB in the beginning and 244.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 4666.58 ms. Allocated memory was 316.7 MB in the beginning and 426.8 MB in the end (delta: 110.1 MB). Free memory was 244.6 MB in the beginning and 301.0 MB in the end (delta: -56.4 MB). Peak memory consumption was 53.7 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, 67 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: 4.5s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 239 SDslu, 400 SDs, 0 SdLazy, 423 SolverSat, 86 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 516 GetRequests, 426 SyntacticMatches, 11 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 478 ConstructedInterpolants, 0 QuantifiedInterpolants, 50829 SizeOfPredicates, 40 NumberOfNonLiveVariables, 632 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...