/usr/bin/java -Xmx8000000000 -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/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/sigma.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 22:57:35,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 22:57:35,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 22:57:35,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 22:57:35,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 22:57:35,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 22:57:35,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 22:57:35,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 22:57:35,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 22:57:35,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 22:57:35,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 22:57:35,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 22:57:35,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 22:57:35,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 22:57:35,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 22:57:35,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 22:57:35,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 22:57:35,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 22:57:35,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 22:57:35,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 22:57:35,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 22:57:35,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 22:57:35,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 22:57:35,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 22:57:35,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 22:57:35,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 22:57:35,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 22:57:35,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 22:57:35,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 22:57:35,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 22:57:35,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 22:57:35,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 22:57:35,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 22:57:35,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 22:57:35,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 22:57:35,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 22:57:35,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 22:57:35,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 22:57:35,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 22:57:35,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 22:57:35,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 22:57:35,219 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2020-04-17 22:57:35,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 22:57:35,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 22:57:35,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 22:57:35,237 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 22:57:35,237 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 22:57:35,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 22:57:35,237 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 22:57:35,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 22:57:35,238 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 22:57:35,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 22:57:35,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 22:57:35,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 22:57:35,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 22:57:35,239 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 22:57:35,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 22:57:35,239 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 22:57:35,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 22:57:35,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 22:57:35,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 22:57:35,240 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 22:57:35,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 22:57:35,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:57:35,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 22:57:35,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 22:57:35,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 22:57:35,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 22:57:35,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 22:57:35,241 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 22:57:35,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 22:57:35,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 22:57:35,520 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 22:57:35,537 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 22:57:35,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 22:57:35,546 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 22:57:35,547 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 22:57:35,548 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/sigma.i [2020-04-17 22:57:35,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2ba5e1c/7e94ae33a3a64f9c9301908068f2850c/FLAG69b8aec51 [2020-04-17 22:57:36,238 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 22:57:36,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/sigma.i [2020-04-17 22:57:36,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2ba5e1c/7e94ae33a3a64f9c9301908068f2850c/FLAG69b8aec51 [2020-04-17 22:57:36,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf2ba5e1c/7e94ae33a3a64f9c9301908068f2850c [2020-04-17 22:57:36,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 22:57:36,535 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 22:57:36,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:36,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 22:57:36,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 22:57:36,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:36" (1/1) ... [2020-04-17 22:57:36,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d45586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:36, skipping insertion in model container [2020-04-17 22:57:36,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:36" (1/1) ... [2020-04-17 22:57:36,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 22:57:36,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 22:57:37,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:37,229 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 22:57:37,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:37,464 INFO L208 MainTranslator]: Completed translation [2020-04-17 22:57:37,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37 WrapperNode [2020-04-17 22:57:37,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:37,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:37,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 22:57:37,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 22:57:37,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:37,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 22:57:37,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 22:57:37,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 22:57:37,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (1/1) ... [2020-04-17 22:57:37,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 22:57:37,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 22:57:37,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 22:57:37,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 22:57:37,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (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 [2020-04-17 22:57:37,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 22:57:37,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-04-17 22:57:37,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 22:57:37,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-17 22:57:37,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 22:57:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-04-17 22:57:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-04-17 22:57:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-04-17 22:57:37,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-04-17 22:57:37,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 22:57:37,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 22:57:37,648 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 22:57:38,107 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 22:57:38,108 INFO L295 CfgBuilder]: Removed 13 assume(true) statements. [2020-04-17 22:57:38,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:38 BoogieIcfgContainer [2020-04-17 22:57:38,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 22:57:38,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 22:57:38,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 22:57:38,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 22:57:38,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 10:57:36" (1/3) ... [2020-04-17 22:57:38,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed49e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:38, skipping insertion in model container [2020-04-17 22:57:38,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:37" (2/3) ... [2020-04-17 22:57:38,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed49e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:38, skipping insertion in model container [2020-04-17 22:57:38,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:38" (3/3) ... [2020-04-17 22:57:38,131 INFO L109 eAbstractionObserver]: Analyzing ICFG sigma.i [2020-04-17 22:57:38,142 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 22:57:38,142 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 22:57:38,151 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 22:57:38,152 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 22:57:38,181 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,182 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,182 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,182 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,183 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,183 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,190 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,190 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,190 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,191 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:38,210 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:57:38,249 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:38,249 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:38,249 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:38,249 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:38,249 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:38,250 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:38,250 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:38,250 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:38,266 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 84 transitions, 176 flow [2020-04-17 22:57:38,268 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-04-17 22:57:38,319 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-04-17 22:57:38,319 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-17 22:57:38,323 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-04-17 22:57:38,326 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-04-17 22:57:38,353 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-04-17 22:57:38,354 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-17 22:57:38,354 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-04-17 22:57:38,356 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 344 [2020-04-17 22:57:38,357 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:40,174 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-04-17 22:57:40,583 WARN L192 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-04-17 22:57:40,703 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 22:57:40,709 INFO L206 etLargeBlockEncoding]: Checked pairs total: 293 [2020-04-17 22:57:40,709 INFO L214 etLargeBlockEncoding]: Total number of compositions: 77 [2020-04-17 22:57:40,713 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions, 42 flow [2020-04-17 22:57:40,720 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 36 states. [2020-04-17 22:57:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-04-17 22:57:40,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:57:40,728 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:40,729 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:57:40,730 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,736 INFO L82 PathProgramCache]: Analyzing trace with hash 10051566, now seen corresponding path program 1 times [2020-04-17 22:57:40,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255088477] [2020-04-17 22:57:40,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255088477] [2020-04-17 22:57:40,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:40,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:40,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678135194] [2020-04-17 22:57:40,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:57:40,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:57:40,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:40,935 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-04-17 22:57:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:40,986 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-04-17 22:57:40,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:57:40,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:57:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:40,998 INFO L225 Difference]: With dead ends: 36 [2020-04-17 22:57:40,998 INFO L226 Difference]: Without dead ends: 31 [2020-04-17 22:57:40,999 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-04-17 22:57:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-04-17 22:57:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-04-17 22:57:41,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2020-04-17 22:57:41,030 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 4 [2020-04-17 22:57:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,030 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2020-04-17 22:57:41,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:57:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2020-04-17 22:57:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:41,031 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,031 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,031 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,032 INFO L82 PathProgramCache]: Analyzing trace with hash -352775593, now seen corresponding path program 1 times [2020-04-17 22:57:41,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860046931] [2020-04-17 22:57:41,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 22:57:41,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860046931] [2020-04-17 22:57:41,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:41,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:41,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919914320] [2020-04-17 22:57:41,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:41,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:41,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:41,126 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 4 states. [2020-04-17 22:57:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:41,161 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-04-17 22:57:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:41,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-04-17 22:57:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:41,162 INFO L225 Difference]: With dead ends: 28 [2020-04-17 22:57:41,163 INFO L226 Difference]: Without dead ends: 28 [2020-04-17 22:57:41,164 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-04-17 22:57:41,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-04-17 22:57:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-04-17 22:57:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-04-17 22:57:41,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 9 [2020-04-17 22:57:41,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,170 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-04-17 22:57:41,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-04-17 22:57:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:41,171 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,171 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-04-17 22:57:41,171 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1949275916, now seen corresponding path program 1 times [2020-04-17 22:57:41,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845490365] [2020-04-17 22:57:41,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:41,288 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:57:41,288 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:57:41,289 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:57:41,289 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:57:41,290 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-04-17 22:57:41,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,296 WARN L315 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,297 WARN L315 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,297 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,297 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,297 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,298 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,298 WARN L315 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,298 WARN L315 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,298 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,298 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,299 WARN L315 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,299 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,299 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,299 WARN L315 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,301 WARN L315 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,301 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,301 WARN L315 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,302 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:41,305 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:57:41,305 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:41,305 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:41,305 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:41,305 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:41,306 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:41,306 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:41,306 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:41,306 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:41,308 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 198 flow [2020-04-17 22:57:41,308 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-04-17 22:57:41,346 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-04-17 22:57:41,347 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-04-17 22:57:41,347 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-04-17 22:57:41,350 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-04-17 22:57:41,381 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-04-17 22:57:41,382 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-04-17 22:57:41,382 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-04-17 22:57:41,385 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 824 [2020-04-17 22:57:41,385 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:42,957 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-04-17 22:57:43,244 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-04-17 22:57:43,600 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-04-17 22:57:43,717 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 22:57:43,733 INFO L206 etLargeBlockEncoding]: Checked pairs total: 676 [2020-04-17 22:57:43,734 INFO L214 etLargeBlockEncoding]: Total number of compositions: 79 [2020-04-17 22:57:43,734 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 22 transitions, 62 flow [2020-04-17 22:57:43,740 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 109 states. [2020-04-17 22:57:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-04-17 22:57:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:57:43,741 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,741 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:57:43,741 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash 15623651, now seen corresponding path program 1 times [2020-04-17 22:57:43,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833331917] [2020-04-17 22:57:43,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833331917] [2020-04-17 22:57:43,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:43,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:43,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356083740] [2020-04-17 22:57:43,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:57:43,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:57:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:43,791 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 3 states. [2020-04-17 22:57:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,825 INFO L93 Difference]: Finished difference Result 109 states and 191 transitions. [2020-04-17 22:57:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:57:43,825 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:57:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,829 INFO L225 Difference]: With dead ends: 109 [2020-04-17 22:57:43,829 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 22:57:43,829 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 22:57:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-04-17 22:57:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 174 transitions. [2020-04-17 22:57:43,844 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 174 transitions. Word has length 4 [2020-04-17 22:57:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,844 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 174 transitions. [2020-04-17 22:57:43,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:57:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 174 transitions. [2020-04-17 22:57:43,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:43,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,845 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:43,845 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash 125559316, now seen corresponding path program 1 times [2020-04-17 22:57:43,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033299841] [2020-04-17 22:57:43,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 22:57:43,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033299841] [2020-04-17 22:57:43,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:43,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:43,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430302946] [2020-04-17 22:57:43,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:43,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:43,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:43,911 INFO L87 Difference]: Start difference. First operand 98 states and 174 transitions. Second operand 4 states. [2020-04-17 22:57:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,956 INFO L93 Difference]: Finished difference Result 103 states and 171 transitions. [2020-04-17 22:57:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:43,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 22:57:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,958 INFO L225 Difference]: With dead ends: 103 [2020-04-17 22:57:43,959 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 22:57:43,959 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 22:57:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-04-17 22:57:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 22:57:43,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 164 transitions. [2020-04-17 22:57:43,970 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 164 transitions. Word has length 10 [2020-04-17 22:57:43,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,970 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 164 transitions. [2020-04-17 22:57:43,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:43,970 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 164 transitions. [2020-04-17 22:57:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:57:43,971 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,972 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:43,972 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,972 INFO L82 PathProgramCache]: Analyzing trace with hash 823605760, now seen corresponding path program 1 times [2020-04-17 22:57:43,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542196338] [2020-04-17 22:57:43,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542196338] [2020-04-17 22:57:44,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200862045] [2020-04-17 22:57:44,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 22:57:44,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:44,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 22:57:44,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503610905] [2020-04-17 22:57:44,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:57:44,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:57:44,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:44,228 INFO L87 Difference]: Start difference. First operand 97 states and 164 transitions. Second operand 10 states. [2020-04-17 22:57:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:44,310 INFO L93 Difference]: Finished difference Result 95 states and 159 transitions. [2020-04-17 22:57:44,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:44,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 22:57:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:44,312 INFO L225 Difference]: With dead ends: 95 [2020-04-17 22:57:44,312 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 22:57:44,312 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 22:57:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-04-17 22:57:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-17 22:57:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-04-17 22:57:44,329 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 17 [2020-04-17 22:57:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:44,329 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-04-17 22:57:44,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:57:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-04-17 22:57:44,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:57:44,330 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:44,331 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-04-17 22:57:44,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,536 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash 26114190, now seen corresponding path program 1 times [2020-04-17 22:57:44,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435413203] [2020-04-17 22:57:44,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:44,622 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:57:44,622 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:57:44,623 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:57:44,623 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:57:44,624 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-04-17 22:57:44,631 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,631 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,632 WARN L315 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,632 WARN L315 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,632 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,632 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,632 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,633 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,633 WARN L315 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,633 WARN L315 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,633 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,633 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,633 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,634 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,634 WARN L315 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,634 WARN L315 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,634 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,634 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,635 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,635 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,635 WARN L315 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,635 WARN L315 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,638 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,639 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,639 WARN L315 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,639 WARN L315 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,640 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,640 WARN L315 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,640 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,641 WARN L315 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:44,644 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:57:44,644 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:44,645 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:44,645 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:44,645 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:44,645 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:44,645 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:44,645 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:44,645 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:44,651 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 96 transitions, 222 flow [2020-04-17 22:57:44,651 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-04-17 22:57:44,734 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-04-17 22:57:44,734 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-04-17 22:57:44,737 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-04-17 22:57:44,741 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-04-17 22:57:44,792 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-04-17 22:57:44,794 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-04-17 22:57:44,795 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-04-17 22:57:44,802 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1320 [2020-04-17 22:57:44,802 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:46,329 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-04-17 22:57:46,654 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-04-17 22:57:46,968 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-04-17 22:57:47,084 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1092 [2020-04-17 22:57:47,084 INFO L214 etLargeBlockEncoding]: Total number of compositions: 84 [2020-04-17 22:57:47,084 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 80 flow [2020-04-17 22:57:47,096 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 297 states. [2020-04-17 22:57:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states. [2020-04-17 22:57:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:57:47,097 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,097 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:57:47,098 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:47,098 INFO L82 PathProgramCache]: Analyzing trace with hash 21531642, now seen corresponding path program 1 times [2020-04-17 22:57:47,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:47,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723893244] [2020-04-17 22:57:47,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723893244] [2020-04-17 22:57:47,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:47,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:47,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757229624] [2020-04-17 22:57:47,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:57:47,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:57:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:47,124 INFO L87 Difference]: Start difference. First operand 297 states. Second operand 3 states. [2020-04-17 22:57:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,155 INFO L93 Difference]: Finished difference Result 297 states and 636 transitions. [2020-04-17 22:57:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:57:47,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:57:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,159 INFO L225 Difference]: With dead ends: 297 [2020-04-17 22:57:47,159 INFO L226 Difference]: Without dead ends: 268 [2020-04-17 22:57:47,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-17 22:57:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-04-17 22:57:47,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 22:57:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 580 transitions. [2020-04-17 22:57:47,180 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 580 transitions. Word has length 4 [2020-04-17 22:57:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,180 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 580 transitions. [2020-04-17 22:57:47,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:57:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 580 transitions. [2020-04-17 22:57:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:47,181 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,181 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:47,182 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:47,182 INFO L82 PathProgramCache]: Analyzing trace with hash 656916489, now seen corresponding path program 1 times [2020-04-17 22:57:47,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:47,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861997571] [2020-04-17 22:57:47,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 22:57:47,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861997571] [2020-04-17 22:57:47,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:47,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:47,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862204913] [2020-04-17 22:57:47,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:47,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:47,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:47,222 INFO L87 Difference]: Start difference. First operand 268 states and 580 transitions. Second operand 4 states. [2020-04-17 22:57:47,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,258 INFO L93 Difference]: Finished difference Result 299 states and 612 transitions. [2020-04-17 22:57:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:47,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 22:57:47,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,264 INFO L225 Difference]: With dead ends: 299 [2020-04-17 22:57:47,264 INFO L226 Difference]: Without dead ends: 299 [2020-04-17 22:57:47,264 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-04-17 22:57:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 277. [2020-04-17 22:57:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-04-17 22:57:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 577 transitions. [2020-04-17 22:57:47,283 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 577 transitions. Word has length 10 [2020-04-17 22:57:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,283 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 577 transitions. [2020-04-17 22:57:47,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 577 transitions. [2020-04-17 22:57:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:57:47,284 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,284 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:47,285 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:47,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:47,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1586347520, now seen corresponding path program 1 times [2020-04-17 22:57:47,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:47,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043908466] [2020-04-17 22:57:47,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043908466] [2020-04-17 22:57:47,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146467289] [2020-04-17 22:57:47,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,424 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 22:57:47,425 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:47,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:47,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 22:57:47,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164049239] [2020-04-17 22:57:47,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:57:47,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:57:47,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:47,483 INFO L87 Difference]: Start difference. First operand 277 states and 577 transitions. Second operand 10 states. [2020-04-17 22:57:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,544 INFO L93 Difference]: Finished difference Result 275 states and 572 transitions. [2020-04-17 22:57:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:47,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 22:57:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,547 INFO L225 Difference]: With dead ends: 275 [2020-04-17 22:57:47,547 INFO L226 Difference]: Without dead ends: 275 [2020-04-17 22:57:47,548 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-04-17 22:57:47,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2020-04-17 22:57:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-04-17 22:57:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 572 transitions. [2020-04-17 22:57:47,581 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 572 transitions. Word has length 17 [2020-04-17 22:57:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,581 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 572 transitions. [2020-04-17 22:57:47,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:57:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 572 transitions. [2020-04-17 22:57:47,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:57:47,585 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,586 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:47,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,787 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:47,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1691264658, now seen corresponding path program 1 times [2020-04-17 22:57:47,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:47,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019054224] [2020-04-17 22:57:47,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019054224] [2020-04-17 22:57:47,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134195919] [2020-04-17 22:57:47,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 22:57:47,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:48,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:48,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 22:57:48,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526680232] [2020-04-17 22:57:48,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:57:48,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:57:48,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:48,010 INFO L87 Difference]: Start difference. First operand 275 states and 572 transitions. Second operand 12 states. [2020-04-17 22:57:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:48,089 INFO L93 Difference]: Finished difference Result 271 states and 560 transitions. [2020-04-17 22:57:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:48,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:57:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:48,092 INFO L225 Difference]: With dead ends: 271 [2020-04-17 22:57:48,093 INFO L226 Difference]: Without dead ends: 271 [2020-04-17 22:57:48,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-04-17 22:57:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-04-17 22:57:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-04-17 22:57:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 560 transitions. [2020-04-17 22:57:48,102 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 560 transitions. Word has length 23 [2020-04-17 22:57:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:48,102 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 560 transitions. [2020-04-17 22:57:48,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:57:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 560 transitions. [2020-04-17 22:57:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:57:48,104 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:48,104 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2020-04-17 22:57:48,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,309 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:48,309 INFO L82 PathProgramCache]: Analyzing trace with hash 539631963, now seen corresponding path program 1 times [2020-04-17 22:57:48,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:48,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144202613] [2020-04-17 22:57:48,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:48,355 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:57:48,356 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:57:48,356 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:57:48,356 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:57:48,357 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-04-17 22:57:48,366 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,366 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,366 WARN L315 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,367 WARN L315 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,367 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,367 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,367 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,367 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,367 WARN L315 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,368 WARN L315 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,368 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,368 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,368 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,368 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,368 WARN L315 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,369 WARN L315 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,369 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,369 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,369 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,369 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,369 WARN L315 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,369 WARN L315 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,370 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,370 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,370 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,370 WARN L315 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,370 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,371 WARN L315 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,377 WARN L315 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,378 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,378 WARN L315 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,378 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,379 WARN L315 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,380 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,380 WARN L315 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,380 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,386 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,387 WARN L315 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,387 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,387 WARN L315 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:48,396 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:57:48,396 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:48,396 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:48,397 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:48,397 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:48,397 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:48,397 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:48,397 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:48,397 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:48,399 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 248 flow [2020-04-17 22:57:48,399 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-04-17 22:57:48,478 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-04-17 22:57:48,478 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-04-17 22:57:48,480 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-04-17 22:57:48,490 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-04-17 22:57:48,563 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-04-17 22:57:48,564 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-04-17 22:57:48,566 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-04-17 22:57:48,578 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1872 [2020-04-17 22:57:48,578 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:50,045 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-04-17 22:57:50,426 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-04-17 22:57:50,763 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-04-17 22:57:50,870 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1730 [2020-04-17 22:57:50,870 INFO L214 etLargeBlockEncoding]: Total number of compositions: 84 [2020-04-17 22:57:50,870 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 100 flow [2020-04-17 22:57:50,898 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 817 states. [2020-04-17 22:57:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states. [2020-04-17 22:57:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:57:50,899 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:50,899 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:57:50,899 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash 27625699, now seen corresponding path program 1 times [2020-04-17 22:57:50,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695764150] [2020-04-17 22:57:50,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695764150] [2020-04-17 22:57:50,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:50,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:50,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726753245] [2020-04-17 22:57:50,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:57:50,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:57:50,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:50,926 INFO L87 Difference]: Start difference. First operand 817 states. Second operand 3 states. [2020-04-17 22:57:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:50,954 INFO L93 Difference]: Finished difference Result 817 states and 2065 transitions. [2020-04-17 22:57:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:57:50,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:57:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:50,961 INFO L225 Difference]: With dead ends: 817 [2020-04-17 22:57:50,961 INFO L226 Difference]: Without dead ends: 734 [2020-04-17 22:57:50,961 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-04-17 22:57:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-04-17 22:57:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-04-17 22:57:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1874 transitions. [2020-04-17 22:57:50,991 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1874 transitions. Word has length 4 [2020-04-17 22:57:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:50,991 INFO L479 AbstractCegarLoop]: Abstraction has 734 states and 1874 transitions. [2020-04-17 22:57:50,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:57:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1874 transitions. [2020-04-17 22:57:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:50,992 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:50,992 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,992 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,992 INFO L82 PathProgramCache]: Analyzing trace with hash -399158139, now seen corresponding path program 1 times [2020-04-17 22:57:50,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398951084] [2020-04-17 22:57:50,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 22:57:51,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398951084] [2020-04-17 22:57:51,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:51,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:51,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058557636] [2020-04-17 22:57:51,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:51,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:51,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:51,027 INFO L87 Difference]: Start difference. First operand 734 states and 1874 transitions. Second operand 4 states. [2020-04-17 22:57:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:51,072 INFO L93 Difference]: Finished difference Result 843 states and 2061 transitions. [2020-04-17 22:57:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:51,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 22:57:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:51,079 INFO L225 Difference]: With dead ends: 843 [2020-04-17 22:57:51,080 INFO L226 Difference]: Without dead ends: 843 [2020-04-17 22:57:51,080 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-04-17 22:57:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 781. [2020-04-17 22:57:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-04-17 22:57:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1934 transitions. [2020-04-17 22:57:51,106 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1934 transitions. Word has length 10 [2020-04-17 22:57:51,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:51,107 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 1934 transitions. [2020-04-17 22:57:51,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:51,107 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1934 transitions. [2020-04-17 22:57:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:57:51,108 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:51,108 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:51,108 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2066968861, now seen corresponding path program 1 times [2020-04-17 22:57:51,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:51,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341612950] [2020-04-17 22:57:51,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341612950] [2020-04-17 22:57:51,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266590618] [2020-04-17 22:57:51,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,250 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 22:57:51,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:51,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:51,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:51,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 22:57:51,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467979929] [2020-04-17 22:57:51,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:57:51,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:57:51,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:51,290 INFO L87 Difference]: Start difference. First operand 781 states and 1934 transitions. Second operand 10 states. [2020-04-17 22:57:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:51,360 INFO L93 Difference]: Finished difference Result 779 states and 1929 transitions. [2020-04-17 22:57:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:51,361 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 22:57:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:51,365 INFO L225 Difference]: With dead ends: 779 [2020-04-17 22:57:51,366 INFO L226 Difference]: Without dead ends: 779 [2020-04-17 22:57:51,366 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:51,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-04-17 22:57:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 779. [2020-04-17 22:57:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-04-17 22:57:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1929 transitions. [2020-04-17 22:57:51,389 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1929 transitions. Word has length 17 [2020-04-17 22:57:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:51,389 INFO L479 AbstractCegarLoop]: Abstraction has 779 states and 1929 transitions. [2020-04-17 22:57:51,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:57:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1929 transitions. [2020-04-17 22:57:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:57:51,391 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:51,391 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:51,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,595 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:51,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:51,595 INFO L82 PathProgramCache]: Analyzing trace with hash 899828126, now seen corresponding path program 1 times [2020-04-17 22:57:51,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:51,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562410234] [2020-04-17 22:57:51,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562410234] [2020-04-17 22:57:51,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774169773] [2020-04-17 22:57:51,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 22:57:51,783 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:51,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:51,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 22:57:51,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582516641] [2020-04-17 22:57:51,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:57:51,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:57:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:51,841 INFO L87 Difference]: Start difference. First operand 779 states and 1929 transitions. Second operand 12 states. [2020-04-17 22:57:51,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:51,922 INFO L93 Difference]: Finished difference Result 775 states and 1917 transitions. [2020-04-17 22:57:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:51,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:57:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:51,929 INFO L225 Difference]: With dead ends: 775 [2020-04-17 22:57:51,930 INFO L226 Difference]: Without dead ends: 775 [2020-04-17 22:57:51,930 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-04-17 22:57:51,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2020-04-17 22:57:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-04-17 22:57:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1917 transitions. [2020-04-17 22:57:51,967 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1917 transitions. Word has length 23 [2020-04-17 22:57:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:51,967 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1917 transitions. [2020-04-17 22:57:51,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:57:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1917 transitions. [2020-04-17 22:57:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 22:57:51,970 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:51,970 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,175 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,176 INFO L82 PathProgramCache]: Analyzing trace with hash -683367746, now seen corresponding path program 1 times [2020-04-17 22:57:52,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084105487] [2020-04-17 22:57:52,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084105487] [2020-04-17 22:57:52,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818935740] [2020-04-17 22:57:52,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:52,362 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 22:57:52,364 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:52,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:52,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 22:57:52,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209120343] [2020-04-17 22:57:52,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:57:52,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:57:52,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:52,415 INFO L87 Difference]: Start difference. First operand 775 states and 1917 transitions. Second operand 14 states. [2020-04-17 22:57:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:52,504 INFO L93 Difference]: Finished difference Result 767 states and 1889 transitions. [2020-04-17 22:57:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:52,505 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 22:57:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:52,512 INFO L225 Difference]: With dead ends: 767 [2020-04-17 22:57:52,512 INFO L226 Difference]: Without dead ends: 767 [2020-04-17 22:57:52,513 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-04-17 22:57:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2020-04-17 22:57:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-04-17 22:57:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1889 transitions. [2020-04-17 22:57:52,539 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1889 transitions. Word has length 29 [2020-04-17 22:57:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,540 INFO L479 AbstractCegarLoop]: Abstraction has 767 states and 1889 transitions. [2020-04-17 22:57:52,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:57:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1889 transitions. [2020-04-17 22:57:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 22:57:52,543 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,543 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,747 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1728417408, now seen corresponding path program 1 times [2020-04-17 22:57:52,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139004488] [2020-04-17 22:57:52,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:52,839 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:57:52,840 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:57:52,840 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:57:52,840 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:57:52,843 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:57:52,843 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-04-17 22:57:52,856 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,857 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,857 WARN L315 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,857 WARN L315 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,857 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,858 WARN L315 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,858 WARN L315 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,859 WARN L315 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,859 WARN L315 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,860 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,860 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,860 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,860 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,861 WARN L315 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,861 WARN L315 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,861 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,861 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,862 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,862 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,862 WARN L315 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,862 WARN L315 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,862 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,863 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,863 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,863 WARN L315 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,863 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,864 WARN L315 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,865 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,865 WARN L315 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,866 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,866 WARN L315 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,867 WARN L315 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,867 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,867 WARN L315 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,867 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,869 WARN L315 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,869 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,869 WARN L315 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,869 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,871 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,871 WARN L315 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,871 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,871 WARN L315 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:52,877 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:57:52,878 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:52,878 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:52,878 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:52,878 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:52,878 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:52,879 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:52,879 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:52,879 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:52,881 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 276 flow [2020-04-17 22:57:52,883 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-04-17 22:57:53,064 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-04-17 22:57:53,064 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-04-17 22:57:53,070 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-04-17 22:57:53,095 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-04-17 22:57:53,253 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-04-17 22:57:53,253 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-04-17 22:57:53,256 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-04-17 22:57:53,276 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2480 [2020-04-17 22:57:53,276 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:55,079 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-04-17 22:57:55,409 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-04-17 22:57:55,513 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-04-17 22:57:55,520 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1953 [2020-04-17 22:57:55,520 INFO L214 etLargeBlockEncoding]: Total number of compositions: 87 [2020-04-17 22:57:55,521 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 31 transitions, 122 flow [2020-04-17 22:57:55,638 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2289 states. [2020-04-17 22:57:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states. [2020-04-17 22:57:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:57:55,639 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:55,639 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:57:55,639 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,640 INFO L82 PathProgramCache]: Analyzing trace with hash 33997000, now seen corresponding path program 1 times [2020-04-17 22:57:55,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648504688] [2020-04-17 22:57:55,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648504688] [2020-04-17 22:57:55,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:55,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:55,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123569513] [2020-04-17 22:57:55,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:57:55,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:57:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:55,661 INFO L87 Difference]: Start difference. First operand 2289 states. Second operand 3 states. [2020-04-17 22:57:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:55,711 INFO L93 Difference]: Finished difference Result 2289 states and 6658 transitions. [2020-04-17 22:57:55,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:57:55,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:57:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:55,731 INFO L225 Difference]: With dead ends: 2289 [2020-04-17 22:57:55,732 INFO L226 Difference]: Without dead ends: 2044 [2020-04-17 22:57:55,732 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:57:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-04-17 22:57:55,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2020-04-17 22:57:55,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2020-04-17 22:57:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6008 transitions. [2020-04-17 22:57:55,820 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6008 transitions. Word has length 4 [2020-04-17 22:57:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:55,821 INFO L479 AbstractCegarLoop]: Abstraction has 2044 states and 6008 transitions. [2020-04-17 22:57:55,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:57:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6008 transitions. [2020-04-17 22:57:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:55,821 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:55,822 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:55,822 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1850212091, now seen corresponding path program 1 times [2020-04-17 22:57:55,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812693320] [2020-04-17 22:57:55,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 22:57:55,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812693320] [2020-04-17 22:57:55,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:55,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:55,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613834063] [2020-04-17 22:57:55,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:55,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:55,855 INFO L87 Difference]: Start difference. First operand 2044 states and 6008 transitions. Second operand 4 states. [2020-04-17 22:57:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:55,925 INFO L93 Difference]: Finished difference Result 2379 states and 6766 transitions. [2020-04-17 22:57:55,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:55,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 22:57:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:55,946 INFO L225 Difference]: With dead ends: 2379 [2020-04-17 22:57:55,946 INFO L226 Difference]: Without dead ends: 2379 [2020-04-17 22:57:55,947 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-04-17 22:57:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2221. [2020-04-17 22:57:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2221 states. [2020-04-17 22:57:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6367 transitions. [2020-04-17 22:57:56,035 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6367 transitions. Word has length 10 [2020-04-17 22:57:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:56,035 INFO L479 AbstractCegarLoop]: Abstraction has 2221 states and 6367 transitions. [2020-04-17 22:57:56,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6367 transitions. [2020-04-17 22:57:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:57:56,036 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:56,036 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,036 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash -50306259, now seen corresponding path program 1 times [2020-04-17 22:57:56,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764962156] [2020-04-17 22:57:56,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764962156] [2020-04-17 22:57:56,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187553330] [2020-04-17 22:57:56,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,162 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 22:57:56,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:56,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:56,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 22:57:56,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108814012] [2020-04-17 22:57:56,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:57:56,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:56,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:57:56,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:56,196 INFO L87 Difference]: Start difference. First operand 2221 states and 6367 transitions. Second operand 10 states. [2020-04-17 22:57:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:56,290 INFO L93 Difference]: Finished difference Result 2219 states and 6362 transitions. [2020-04-17 22:57:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:57:56,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 22:57:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:56,311 INFO L225 Difference]: With dead ends: 2219 [2020-04-17 22:57:56,311 INFO L226 Difference]: Without dead ends: 2219 [2020-04-17 22:57:56,312 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-04-17 22:57:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2219. [2020-04-17 22:57:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2219 states. [2020-04-17 22:57:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 6362 transitions. [2020-04-17 22:57:56,406 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 6362 transitions. Word has length 17 [2020-04-17 22:57:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:56,406 INFO L479 AbstractCegarLoop]: Abstraction has 2219 states and 6362 transitions. [2020-04-17 22:57:56,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:57:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 6362 transitions. [2020-04-17 22:57:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:57:56,408 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:56,408 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,612 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,613 INFO L82 PathProgramCache]: Analyzing trace with hash -811477057, now seen corresponding path program 1 times [2020-04-17 22:57:56,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928714361] [2020-04-17 22:57:56,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928714361] [2020-04-17 22:57:56,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483482854] [2020-04-17 22:57:56,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,783 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 22:57:56,784 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:56,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:56,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:56,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 22:57:56,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817307087] [2020-04-17 22:57:56,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:57:56,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:56,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:57:56,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:56,824 INFO L87 Difference]: Start difference. First operand 2219 states and 6362 transitions. Second operand 12 states. [2020-04-17 22:57:56,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:56,909 INFO L93 Difference]: Finished difference Result 2215 states and 6350 transitions. [2020-04-17 22:57:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:56,909 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:57:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:56,929 INFO L225 Difference]: With dead ends: 2215 [2020-04-17 22:57:56,929 INFO L226 Difference]: Without dead ends: 2215 [2020-04-17 22:57:56,930 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:56,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-04-17 22:57:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2215. [2020-04-17 22:57:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2215 states. [2020-04-17 22:57:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6350 transitions. [2020-04-17 22:57:57,023 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6350 transitions. Word has length 23 [2020-04-17 22:57:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:57,024 INFO L479 AbstractCegarLoop]: Abstraction has 2215 states and 6350 transitions. [2020-04-17 22:57:57,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:57:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6350 transitions. [2020-04-17 22:57:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 22:57:57,026 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:57,026 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:57,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,231 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:57,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:57,232 INFO L82 PathProgramCache]: Analyzing trace with hash -346309584, now seen corresponding path program 1 times [2020-04-17 22:57:57,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:57,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143336323] [2020-04-17 22:57:57,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143336323] [2020-04-17 22:57:57,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380833151] [2020-04-17 22:57:57,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,465 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 22:57:57,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:57,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:57,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 22:57:57,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893004926] [2020-04-17 22:57:57,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:57:57,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:57,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:57:57,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:57,537 INFO L87 Difference]: Start difference. First operand 2215 states and 6350 transitions. Second operand 14 states. [2020-04-17 22:57:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:57,624 INFO L93 Difference]: Finished difference Result 2207 states and 6322 transitions. [2020-04-17 22:57:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:57,624 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 22:57:57,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:57,661 INFO L225 Difference]: With dead ends: 2207 [2020-04-17 22:57:57,662 INFO L226 Difference]: Without dead ends: 2207 [2020-04-17 22:57:57,662 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-04-17 22:57:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2020-04-17 22:57:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2207 states. [2020-04-17 22:57:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6322 transitions. [2020-04-17 22:57:57,729 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6322 transitions. Word has length 29 [2020-04-17 22:57:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:57,730 INFO L479 AbstractCegarLoop]: Abstraction has 2207 states and 6322 transitions. [2020-04-17 22:57:57,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:57:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6322 transitions. [2020-04-17 22:57:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 22:57:57,733 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:57,734 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:57,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,938 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:57,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:57,938 INFO L82 PathProgramCache]: Analyzing trace with hash 107769152, now seen corresponding path program 1 times [2020-04-17 22:57:57,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:57,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66816131] [2020-04-17 22:57:57,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66816131] [2020-04-17 22:57:58,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053005684] [2020-04-17 22:57:58,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:58,117 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:57:58,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:58,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2020-04-17 22:57:58,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371543572] [2020-04-17 22:57:58,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:57:58,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:57:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:58,187 INFO L87 Difference]: Start difference. First operand 2207 states and 6322 transitions. Second operand 16 states. [2020-04-17 22:57:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:58,274 INFO L93 Difference]: Finished difference Result 2191 states and 6258 transitions. [2020-04-17 22:57:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:58,274 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-04-17 22:57:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:58,282 INFO L225 Difference]: With dead ends: 2191 [2020-04-17 22:57:58,282 INFO L226 Difference]: Without dead ends: 2191 [2020-04-17 22:57:58,282 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2020-04-17 22:57:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 2191. [2020-04-17 22:57:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2191 states. [2020-04-17 22:57:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6258 transitions. [2020-04-17 22:57:58,346 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6258 transitions. Word has length 35 [2020-04-17 22:57:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:58,348 INFO L479 AbstractCegarLoop]: Abstraction has 2191 states and 6258 transitions. [2020-04-17 22:57:58,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:57:58,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6258 transitions. [2020-04-17 22:57:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 22:57:58,350 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:58,350 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:58,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,554 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:58,554 INFO L82 PathProgramCache]: Analyzing trace with hash -793168517, now seen corresponding path program 1 times [2020-04-17 22:57:58,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:58,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169918845] [2020-04-17 22:57:58,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:57:58,624 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:57:58,624 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:57:58,625 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:57:58,625 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:57:58,626 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:57:58,626 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-04-17 22:57:58,634 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,634 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,635 WARN L315 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,635 WARN L315 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,635 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,635 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,635 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,635 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,636 WARN L315 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,636 WARN L315 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,636 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,636 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,636 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,636 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,637 WARN L315 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,637 WARN L315 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,637 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,637 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,637 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,637 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,637 WARN L315 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,637 WARN L315 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,638 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,638 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,638 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,638 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,638 WARN L315 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,638 WARN L315 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,638 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,639 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,639 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,639 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,639 WARN L315 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,639 WARN L315 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,639 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,640 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,640 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,640 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,640 WARN L315 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,640 WARN L315 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,642 WARN L315 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,642 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,642 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,642 WARN L315 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,643 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,644 WARN L315 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,644 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,644 WARN L315 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,645 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,645 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,646 WARN L315 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,646 WARN L315 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,647 WARN L315 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,648 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,648 WARN L315 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,648 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,650 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,650 WARN L315 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,650 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,650 WARN L315 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:58,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:57:58,657 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:58,657 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:58,657 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:58,657 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:58,657 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:58,657 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:58,657 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:58,658 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:58,659 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 114 transitions, 306 flow [2020-04-17 22:57:58,659 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-04-17 22:57:58,967 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-04-17 22:57:58,967 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-04-17 22:57:58,977 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-04-17 22:57:59,053 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-04-17 22:57:59,364 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-04-17 22:57:59,364 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-04-17 22:57:59,373 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-04-17 22:57:59,403 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3144 [2020-04-17 22:57:59,404 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:58:00,945 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-04-17 22:58:01,215 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-04-17 22:58:01,584 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-04-17 22:58:01,698 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-04-17 22:58:01,703 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2432 [2020-04-17 22:58:01,703 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2020-04-17 22:58:01,704 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 34 transitions, 146 flow [2020-04-17 22:58:02,002 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6529 states. [2020-04-17 22:58:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states. [2020-04-17 22:58:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:58:02,002 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,003 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:58:02,003 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 40649002, now seen corresponding path program 1 times [2020-04-17 22:58:02,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163348081] [2020-04-17 22:58:02,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163348081] [2020-04-17 22:58:02,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:58:02,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:58:02,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842723232] [2020-04-17 22:58:02,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:58:02,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:58:02,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:58:02,023 INFO L87 Difference]: Start difference. First operand 6529 states. Second operand 3 states. [2020-04-17 22:58:02,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,081 INFO L93 Difference]: Finished difference Result 6529 states and 21447 transitions. [2020-04-17 22:58:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:58:02,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:58:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,105 INFO L225 Difference]: With dead ends: 6529 [2020-04-17 22:58:02,105 INFO L226 Difference]: Without dead ends: 5798 [2020-04-17 22:58:02,106 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:58:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-04-17 22:58:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5798. [2020-04-17 22:58:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5798 states. [2020-04-17 22:58:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 19258 transitions. [2020-04-17 22:58:02,340 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 19258 transitions. Word has length 4 [2020-04-17 22:58:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,340 INFO L479 AbstractCegarLoop]: Abstraction has 5798 states and 19258 transitions. [2020-04-17 22:58:02,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:58:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 19258 transitions. [2020-04-17 22:58:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:58:02,341 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,341 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:02,341 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1545227554, now seen corresponding path program 1 times [2020-04-17 22:58:02,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461563731] [2020-04-17 22:58:02,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 22:58:02,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461563731] [2020-04-17 22:58:02,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:58:02,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:58:02,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065259037] [2020-04-17 22:58:02,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:58:02,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:58:02,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:58:02,380 INFO L87 Difference]: Start difference. First operand 5798 states and 19258 transitions. Second operand 4 states. [2020-04-17 22:58:02,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,597 INFO L93 Difference]: Finished difference Result 6779 states and 21955 transitions. [2020-04-17 22:58:02,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:58:02,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 22:58:02,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,627 INFO L225 Difference]: With dead ends: 6779 [2020-04-17 22:58:02,628 INFO L226 Difference]: Without dead ends: 6779 [2020-04-17 22:58:02,628 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:58:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2020-04-17 22:58:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6397. [2020-04-17 22:58:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6397 states. [2020-04-17 22:58:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6397 states to 6397 states and 20804 transitions. [2020-04-17 22:58:02,872 INFO L78 Accepts]: Start accepts. Automaton has 6397 states and 20804 transitions. Word has length 10 [2020-04-17 22:58:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,872 INFO L479 AbstractCegarLoop]: Abstraction has 6397 states and 20804 transitions. [2020-04-17 22:58:02,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:58:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 6397 states and 20804 transitions. [2020-04-17 22:58:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:58:02,873 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,873 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:02,873 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,874 INFO L82 PathProgramCache]: Analyzing trace with hash 2077640958, now seen corresponding path program 1 times [2020-04-17 22:58:02,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985841500] [2020-04-17 22:58:02,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985841500] [2020-04-17 22:58:02,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960702931] [2020-04-17 22:58:02,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,010 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:03,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 22:58:03,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408262464] [2020-04-17 22:58:03,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:58:03,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:58:03,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:58:03,035 INFO L87 Difference]: Start difference. First operand 6397 states and 20804 transitions. Second operand 10 states. [2020-04-17 22:58:03,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:03,115 INFO L93 Difference]: Finished difference Result 6395 states and 20799 transitions. [2020-04-17 22:58:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:58:03,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 22:58:03,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:03,137 INFO L225 Difference]: With dead ends: 6395 [2020-04-17 22:58:03,137 INFO L226 Difference]: Without dead ends: 6395 [2020-04-17 22:58:03,138 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:58:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2020-04-17 22:58:03,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6395. [2020-04-17 22:58:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-04-17 22:58:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 20799 transitions. [2020-04-17 22:58:03,312 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 20799 transitions. Word has length 17 [2020-04-17 22:58:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:03,312 INFO L479 AbstractCegarLoop]: Abstraction has 6395 states and 20799 transitions. [2020-04-17 22:58:03,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:58:03,312 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 20799 transitions. [2020-04-17 22:58:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:58:03,313 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:03,313 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:03,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,519 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:03,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591663, now seen corresponding path program 1 times [2020-04-17 22:58:03,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:03,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945166211] [2020-04-17 22:58:03,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945166211] [2020-04-17 22:58:03,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357927756] [2020-04-17 22:58:03,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,677 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,686 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:03,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 22:58:03,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002865937] [2020-04-17 22:58:03,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:58:03,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:58:03,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:58:03,739 INFO L87 Difference]: Start difference. First operand 6395 states and 20799 transitions. Second operand 12 states. [2020-04-17 22:58:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:03,844 INFO L93 Difference]: Finished difference Result 6391 states and 20787 transitions. [2020-04-17 22:58:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:58:03,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:58:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:03,872 INFO L225 Difference]: With dead ends: 6391 [2020-04-17 22:58:03,872 INFO L226 Difference]: Without dead ends: 6391 [2020-04-17 22:58:03,874 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:58:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2020-04-17 22:58:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 6391. [2020-04-17 22:58:04,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6391 states. [2020-04-17 22:58:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 20787 transitions. [2020-04-17 22:58:04,504 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 20787 transitions. Word has length 23 [2020-04-17 22:58:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:04,504 INFO L479 AbstractCegarLoop]: Abstraction has 6391 states and 20787 transitions. [2020-04-17 22:58:04,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:58:04,504 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 20787 transitions. [2020-04-17 22:58:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 22:58:04,505 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:04,505 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:04,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,709 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1656058557, now seen corresponding path program 1 times [2020-04-17 22:58:04,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:04,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279654877] [2020-04-17 22:58:04,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:04,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279654877] [2020-04-17 22:58:04,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142051842] [2020-04-17 22:58:04,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:04,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 22:58:04,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:04,935 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:04,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:04,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 22:58:04,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241464389] [2020-04-17 22:58:04,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:58:04,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:04,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:58:04,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:58:04,938 INFO L87 Difference]: Start difference. First operand 6391 states and 20787 transitions. Second operand 14 states. [2020-04-17 22:58:05,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:05,062 INFO L93 Difference]: Finished difference Result 6383 states and 20759 transitions. [2020-04-17 22:58:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:58:05,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 22:58:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:05,092 INFO L225 Difference]: With dead ends: 6383 [2020-04-17 22:58:05,093 INFO L226 Difference]: Without dead ends: 6383 [2020-04-17 22:58:05,093 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:58:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-04-17 22:58:05,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6383. [2020-04-17 22:58:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6383 states. [2020-04-17 22:58:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 20759 transitions. [2020-04-17 22:58:05,325 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 20759 transitions. Word has length 29 [2020-04-17 22:58:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:05,326 INFO L479 AbstractCegarLoop]: Abstraction has 6383 states and 20759 transitions. [2020-04-17 22:58:05,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:58:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 20759 transitions. [2020-04-17 22:58:05,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 22:58:05,329 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:05,329 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:05,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:05,534 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:05,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:05,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1120181460, now seen corresponding path program 1 times [2020-04-17 22:58:05,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:05,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531206912] [2020-04-17 22:58:05,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:05,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531206912] [2020-04-17 22:58:05,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348784249] [2020-04-17 22:58:05,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:05,708 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:58:05,709 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:05,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:05,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2020-04-17 22:58:05,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946909619] [2020-04-17 22:58:05,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:05,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:05,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:05,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:05,774 INFO L87 Difference]: Start difference. First operand 6383 states and 20759 transitions. Second operand 16 states. [2020-04-17 22:58:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:05,909 INFO L93 Difference]: Finished difference Result 6367 states and 20695 transitions. [2020-04-17 22:58:05,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:58:05,909 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-04-17 22:58:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:05,929 INFO L225 Difference]: With dead ends: 6367 [2020-04-17 22:58:05,930 INFO L226 Difference]: Without dead ends: 6367 [2020-04-17 22:58:05,930 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:05,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2020-04-17 22:58:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6367. [2020-04-17 22:58:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6367 states. [2020-04-17 22:58:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 20695 transitions. [2020-04-17 22:58:06,210 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 20695 transitions. Word has length 35 [2020-04-17 22:58:06,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:06,210 INFO L479 AbstractCegarLoop]: Abstraction has 6367 states and 20695 transitions. [2020-04-17 22:58:06,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 20695 transitions. [2020-04-17 22:58:06,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 22:58:06,216 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:06,216 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:06,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:06,417 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:06,417 INFO L82 PathProgramCache]: Analyzing trace with hash -531586812, now seen corresponding path program 1 times [2020-04-17 22:58:06,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:06,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117791172] [2020-04-17 22:58:06,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:06,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117791172] [2020-04-17 22:58:06,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271370358] [2020-04-17 22:58:06,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:06,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:58:06,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:06,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:06,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2020-04-17 22:58:06,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137599474] [2020-04-17 22:58:06,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 22:58:06,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:06,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 22:58:06,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:06,770 INFO L87 Difference]: Start difference. First operand 6367 states and 20695 transitions. Second operand 18 states. [2020-04-17 22:58:06,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:06,911 INFO L93 Difference]: Finished difference Result 6335 states and 20551 transitions. [2020-04-17 22:58:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:58:06,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-04-17 22:58:06,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:06,938 INFO L225 Difference]: With dead ends: 6335 [2020-04-17 22:58:06,938 INFO L226 Difference]: Without dead ends: 6335 [2020-04-17 22:58:06,941 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6335 states. [2020-04-17 22:58:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6335 to 6335. [2020-04-17 22:58:07,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6335 states. [2020-04-17 22:58:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 20551 transitions. [2020-04-17 22:58:07,140 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 20551 transitions. Word has length 41 [2020-04-17 22:58:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:07,140 INFO L479 AbstractCegarLoop]: Abstraction has 6335 states and 20551 transitions. [2020-04-17 22:58:07,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 22:58:07,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 20551 transitions. [2020-04-17 22:58:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 22:58:07,143 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:07,143 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:07,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:07,346 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:07,347 INFO L82 PathProgramCache]: Analyzing trace with hash -431266190, now seen corresponding path program 1 times [2020-04-17 22:58:07,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:07,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548365110] [2020-04-17 22:58:07,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:07,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:58:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:58:07,411 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:58:07,412 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:58:07,412 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:58:07,413 WARN L363 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:58:07,413 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-04-17 22:58:07,422 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,422 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,422 WARN L315 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,422 WARN L315 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,423 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,423 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,423 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,423 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,423 WARN L315 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,423 WARN L315 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,424 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,424 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,424 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,424 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,424 WARN L315 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,424 WARN L315 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,424 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,424 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,425 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,425 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,425 WARN L315 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,425 WARN L315 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,425 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,425 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,425 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,426 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,426 WARN L315 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,426 WARN L315 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,426 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,426 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,426 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,426 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,427 WARN L315 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,427 WARN L315 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,427 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,427 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,427 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,427 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,427 WARN L315 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,427 WARN L315 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,428 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,428 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,428 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,428 WARN L315 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,428 WARN L315 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,429 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,430 WARN L315 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,430 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,430 WARN L315 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,430 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,432 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,432 WARN L315 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,432 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,432 WARN L315 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,434 WARN L315 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,434 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,434 WARN L315 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,434 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,435 WARN L315 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,435 WARN L315 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,435 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,436 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,437 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,437 WARN L315 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,437 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,437 WARN L315 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,438 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,438 WARN L315 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,438 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,439 WARN L315 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:07,444 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:58:07,445 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:58:07,445 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:58:07,445 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:58:07,445 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:58:07,445 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:58:07,445 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:58:07,445 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:58:07,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:58:07,447 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 120 transitions, 338 flow [2020-04-17 22:58:07,447 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-04-17 22:58:08,129 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-04-17 22:58:08,129 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-04-17 22:58:08,143 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-04-17 22:58:08,212 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-04-17 22:58:08,714 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-04-17 22:58:08,715 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-04-17 22:58:08,732 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-04-17 22:58:08,807 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3864 [2020-04-17 22:58:08,808 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:58:09,559 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-04-17 22:58:10,755 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-04-17 22:58:11,148 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-04-17 22:58:11,250 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3124 [2020-04-17 22:58:11,251 INFO L214 etLargeBlockEncoding]: Total number of compositions: 95 [2020-04-17 22:58:11,251 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 37 transitions, 172 flow [2020-04-17 22:58:12,417 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18897 states. [2020-04-17 22:58:12,417 INFO L276 IsEmpty]: Start isEmpty. Operand 18897 states. [2020-04-17 22:58:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:58:12,417 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:12,417 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:58:12,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:12,418 INFO L82 PathProgramCache]: Analyzing trace with hash 47630986, now seen corresponding path program 1 times [2020-04-17 22:58:12,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:12,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195040517] [2020-04-17 22:58:12,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195040517] [2020-04-17 22:58:12,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:58:12,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:58:12,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13033724] [2020-04-17 22:58:12,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:58:12,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:58:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:58:12,435 INFO L87 Difference]: Start difference. First operand 18897 states. Second operand 3 states. [2020-04-17 22:58:12,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:12,533 INFO L93 Difference]: Finished difference Result 18897 states and 69116 transitions. [2020-04-17 22:58:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:58:12,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:58:12,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:12,586 INFO L225 Difference]: With dead ends: 18897 [2020-04-17 22:58:12,586 INFO L226 Difference]: Without dead ends: 16708 [2020-04-17 22:58:12,587 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:58:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2020-04-17 22:58:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 16708. [2020-04-17 22:58:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16708 states. [2020-04-17 22:58:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16708 states to 16708 states and 61824 transitions. [2020-04-17 22:58:13,122 INFO L78 Accepts]: Start accepts. Automaton has 16708 states and 61824 transitions. Word has length 4 [2020-04-17 22:58:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:13,122 INFO L479 AbstractCegarLoop]: Abstraction has 16708 states and 61824 transitions. [2020-04-17 22:58:13,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:58:13,122 INFO L276 IsEmpty]: Start isEmpty. Operand 16708 states and 61824 transitions. [2020-04-17 22:58:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:58:13,122 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:13,122 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:13,123 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1252214789, now seen corresponding path program 1 times [2020-04-17 22:58:13,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:13,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380407411] [2020-04-17 22:58:13,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 22:58:13,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380407411] [2020-04-17 22:58:13,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:58:13,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:58:13,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296087820] [2020-04-17 22:58:13,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:58:13,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:13,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:58:13,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:58:13,147 INFO L87 Difference]: Start difference. First operand 16708 states and 61824 transitions. Second operand 4 states. [2020-04-17 22:58:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:13,281 INFO L93 Difference]: Finished difference Result 19531 states and 70840 transitions. [2020-04-17 22:58:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:58:13,282 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 22:58:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:13,336 INFO L225 Difference]: With dead ends: 19531 [2020-04-17 22:58:13,337 INFO L226 Difference]: Without dead ends: 19531 [2020-04-17 22:58:13,337 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:58:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19531 states. [2020-04-17 22:58:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19531 to 18637. [2020-04-17 22:58:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18637 states. [2020-04-17 22:58:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18637 states to 18637 states and 67705 transitions. [2020-04-17 22:58:14,982 INFO L78 Accepts]: Start accepts. Automaton has 18637 states and 67705 transitions. Word has length 10 [2020-04-17 22:58:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,982 INFO L479 AbstractCegarLoop]: Abstraction has 18637 states and 67705 transitions. [2020-04-17 22:58:14,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:58:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 18637 states and 67705 transitions. [2020-04-17 22:58:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:58:14,982 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,983 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:14,983 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1432879296, now seen corresponding path program 1 times [2020-04-17 22:58:14,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:14,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253514016] [2020-04-17 22:58:14,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253514016] [2020-04-17 22:58:15,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112228335] [2020-04-17 22:58:15,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,121 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,122 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:15,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:15,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 22:58:15,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391364999] [2020-04-17 22:58:15,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:58:15,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:15,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:58:15,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:58:15,155 INFO L87 Difference]: Start difference. First operand 18637 states and 67705 transitions. Second operand 10 states. [2020-04-17 22:58:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:15,306 INFO L93 Difference]: Finished difference Result 18635 states and 67700 transitions. [2020-04-17 22:58:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:58:15,307 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 22:58:15,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:15,362 INFO L225 Difference]: With dead ends: 18635 [2020-04-17 22:58:15,363 INFO L226 Difference]: Without dead ends: 18635 [2020-04-17 22:58:15,363 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:58:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18635 states. [2020-04-17 22:58:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18635 to 18635. [2020-04-17 22:58:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18635 states. [2020-04-17 22:58:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18635 states to 18635 states and 67700 transitions. [2020-04-17 22:58:16,048 INFO L78 Accepts]: Start accepts. Automaton has 18635 states and 67700 transitions. Word has length 17 [2020-04-17 22:58:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:16,049 INFO L479 AbstractCegarLoop]: Abstraction has 18635 states and 67700 transitions. [2020-04-17 22:58:16,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:58:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 18635 states and 67700 transitions. [2020-04-17 22:58:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:58:16,049 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:16,050 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:16,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,254 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:16,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:16,255 INFO L82 PathProgramCache]: Analyzing trace with hash -619616742, now seen corresponding path program 1 times [2020-04-17 22:58:16,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:16,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874671606] [2020-04-17 22:58:16,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:16,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874671606] [2020-04-17 22:58:16,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928917539] [2020-04-17 22:58:16,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:16,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 22:58:16,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:16,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:16,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 22:58:16,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751121597] [2020-04-17 22:58:16,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:58:16,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:16,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:58:16,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:58:16,436 INFO L87 Difference]: Start difference. First operand 18635 states and 67700 transitions. Second operand 12 states. [2020-04-17 22:58:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:16,581 INFO L93 Difference]: Finished difference Result 18631 states and 67688 transitions. [2020-04-17 22:58:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:58:16,582 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:58:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:16,619 INFO L225 Difference]: With dead ends: 18631 [2020-04-17 22:58:16,620 INFO L226 Difference]: Without dead ends: 18631 [2020-04-17 22:58:16,620 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:58:16,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18631 states. [2020-04-17 22:58:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18631 to 18631. [2020-04-17 22:58:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18631 states. [2020-04-17 22:58:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 67688 transitions. [2020-04-17 22:58:17,026 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 67688 transitions. Word has length 23 [2020-04-17 22:58:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:17,026 INFO L479 AbstractCegarLoop]: Abstraction has 18631 states and 67688 transitions. [2020-04-17 22:58:17,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:58:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 67688 transitions. [2020-04-17 22:58:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 22:58:17,027 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:17,027 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:17,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,230 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:17,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash 872252755, now seen corresponding path program 1 times [2020-04-17 22:58:17,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:17,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629565355] [2020-04-17 22:58:17,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629565355] [2020-04-17 22:58:17,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080786208] [2020-04-17 22:58:17,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 22:58:17,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:17,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:17,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 22:58:17,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496586672] [2020-04-17 22:58:17,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:58:17,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:58:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:58:17,441 INFO L87 Difference]: Start difference. First operand 18631 states and 67688 transitions. Second operand 14 states. [2020-04-17 22:58:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:17,816 INFO L93 Difference]: Finished difference Result 18623 states and 67660 transitions. [2020-04-17 22:58:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:58:17,816 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 22:58:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:17,856 INFO L225 Difference]: With dead ends: 18623 [2020-04-17 22:58:17,856 INFO L226 Difference]: Without dead ends: 18623 [2020-04-17 22:58:17,856 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:58:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18623 states. [2020-04-17 22:58:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18623 to 18623. [2020-04-17 22:58:18,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18623 states. [2020-04-17 22:58:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18623 states to 18623 states and 67660 transitions. [2020-04-17 22:58:18,230 INFO L78 Accepts]: Start accepts. Automaton has 18623 states and 67660 transitions. Word has length 29 [2020-04-17 22:58:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:18,231 INFO L479 AbstractCegarLoop]: Abstraction has 18623 states and 67660 transitions. [2020-04-17 22:58:18,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:58:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 18623 states and 67660 transitions. [2020-04-17 22:58:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 22:58:18,232 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:18,233 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:18,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,436 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:18,436 INFO L82 PathProgramCache]: Analyzing trace with hash -603243733, now seen corresponding path program 1 times [2020-04-17 22:58:18,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:18,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145775592] [2020-04-17 22:58:18,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:18,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145775592] [2020-04-17 22:58:18,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491002845] [2020-04-17 22:58:18,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:18,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:58:18,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:18,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:18,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2020-04-17 22:58:18,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6159950] [2020-04-17 22:58:18,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:18,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:18,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:18,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:18,665 INFO L87 Difference]: Start difference. First operand 18623 states and 67660 transitions. Second operand 16 states. [2020-04-17 22:58:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:18,805 INFO L93 Difference]: Finished difference Result 18607 states and 67596 transitions. [2020-04-17 22:58:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:58:18,805 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-04-17 22:58:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:18,839 INFO L225 Difference]: With dead ends: 18607 [2020-04-17 22:58:18,840 INFO L226 Difference]: Without dead ends: 18607 [2020-04-17 22:58:18,840 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:18,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18607 states. [2020-04-17 22:58:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18607 to 18607. [2020-04-17 22:58:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18607 states. [2020-04-17 22:58:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 67596 transitions. [2020-04-17 22:58:19,524 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 67596 transitions. Word has length 35 [2020-04-17 22:58:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:19,524 INFO L479 AbstractCegarLoop]: Abstraction has 18607 states and 67596 transitions. [2020-04-17 22:58:19,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 67596 transitions. [2020-04-17 22:58:19,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 22:58:19,528 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:19,529 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:19,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:19,732 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:19,732 INFO L82 PathProgramCache]: Analyzing trace with hash -131017630, now seen corresponding path program 1 times [2020-04-17 22:58:19,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:19,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718274843] [2020-04-17 22:58:19,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:19,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718274843] [2020-04-17 22:58:19,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679897900] [2020-04-17 22:58:19,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:19,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:58:19,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:20,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:20,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2020-04-17 22:58:20,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330695505] [2020-04-17 22:58:20,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 22:58:20,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:20,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 22:58:20,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:20,016 INFO L87 Difference]: Start difference. First operand 18607 states and 67596 transitions. Second operand 18 states. [2020-04-17 22:58:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:20,224 INFO L93 Difference]: Finished difference Result 18575 states and 67452 transitions. [2020-04-17 22:58:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:58:20,225 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-04-17 22:58:20,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:20,279 INFO L225 Difference]: With dead ends: 18575 [2020-04-17 22:58:20,279 INFO L226 Difference]: Without dead ends: 18575 [2020-04-17 22:58:20,279 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2020-04-17 22:58:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 18575. [2020-04-17 22:58:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18575 states. [2020-04-17 22:58:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18575 states to 18575 states and 67452 transitions. [2020-04-17 22:58:20,669 INFO L78 Accepts]: Start accepts. Automaton has 18575 states and 67452 transitions. Word has length 41 [2020-04-17 22:58:20,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:20,670 INFO L479 AbstractCegarLoop]: Abstraction has 18575 states and 67452 transitions. [2020-04-17 22:58:20,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 22:58:20,670 INFO L276 IsEmpty]: Start isEmpty. Operand 18575 states and 67452 transitions. [2020-04-17 22:58:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-17 22:58:20,675 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:20,676 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:20,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:20,876 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:20,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:20,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1557656136, now seen corresponding path program 1 times [2020-04-17 22:58:20,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:20,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642105335] [2020-04-17 22:58:20,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:21,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642105335] [2020-04-17 22:58:21,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805885916] [2020-04-17 22:58:21,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:21,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:58:21,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:21,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:21,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2020-04-17 22:58:21,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217622677] [2020-04-17 22:58:21,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 22:58:21,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:21,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 22:58:21,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:21,211 INFO L87 Difference]: Start difference. First operand 18575 states and 67452 transitions. Second operand 20 states. [2020-04-17 22:58:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:21,350 INFO L93 Difference]: Finished difference Result 18511 states and 67132 transitions. [2020-04-17 22:58:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:58:21,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-04-17 22:58:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:21,386 INFO L225 Difference]: With dead ends: 18511 [2020-04-17 22:58:21,386 INFO L226 Difference]: Without dead ends: 18511 [2020-04-17 22:58:21,386 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:21,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18511 states. [2020-04-17 22:58:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18511 to 18511. [2020-04-17 22:58:22,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18511 states. [2020-04-17 22:58:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 67132 transitions. [2020-04-17 22:58:22,153 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 67132 transitions. Word has length 47 [2020-04-17 22:58:22,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:22,154 INFO L479 AbstractCegarLoop]: Abstraction has 18511 states and 67132 transitions. [2020-04-17 22:58:22,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 22:58:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 67132 transitions. [2020-04-17 22:58:22,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-17 22:58:22,157 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:22,157 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:22,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:22,358 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:22,358 INFO L82 PathProgramCache]: Analyzing trace with hash 230242214, now seen corresponding path program 1 times [2020-04-17 22:58:22,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:22,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408217593] [2020-04-17 22:58:22,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:58:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:58:22,399 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:58:22,399 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:58:22,399 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:58:22,400 WARN L363 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:58:22,400 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-04-17 22:58:22,410 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,411 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,411 WARN L315 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,411 WARN L315 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,411 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,411 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,412 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,412 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,412 WARN L315 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,412 WARN L315 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,412 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,412 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,413 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,413 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,413 WARN L315 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,413 WARN L315 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,413 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,413 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,413 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,414 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,414 WARN L315 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,414 WARN L315 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,414 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,414 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,414 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,414 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,415 WARN L315 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,415 WARN L315 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,415 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,415 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,415 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,415 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,415 WARN L315 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,416 WARN L315 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,416 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,416 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,416 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,416 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,416 WARN L315 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,416 WARN L315 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,417 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,417 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,417 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,417 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,417 WARN L315 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,417 WARN L315 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,417 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,418 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,418 WARN L315 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,418 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,418 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,419 WARN L315 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,420 WARN L315 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,420 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,420 WARN L315 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,421 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,422 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,422 WARN L315 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,422 WARN L315 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,422 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,424 WARN L315 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,424 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,424 WARN L315 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,424 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,425 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,426 WARN L315 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,426 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,426 WARN L315 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,427 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,427 WARN L315 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,427 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,428 WARN L315 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,429 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,429 WARN L315 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,429 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,429 WARN L315 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,430 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,431 WARN L315 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,431 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,431 WARN L315 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:58:22,443 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:58:22,444 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:58:22,444 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:58:22,444 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:58:22,444 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:58:22,444 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:58:22,445 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:58:22,445 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:58:22,445 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:58:22,446 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 126 transitions, 372 flow [2020-04-17 22:58:22,446 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-04-17 22:58:24,343 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-04-17 22:58:24,344 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-04-17 22:58:24,362 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-04-17 22:58:24,448 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-04-17 22:58:25,314 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-04-17 22:58:25,314 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-04-17 22:58:25,359 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-04-17 22:58:25,501 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 4640 [2020-04-17 22:58:25,502 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:58:27,524 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-04-17 22:58:27,637 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-04-17 22:58:28,102 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-04-17 22:58:28,220 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-04-17 22:58:28,236 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3851 [2020-04-17 22:58:28,236 INFO L214 etLargeBlockEncoding]: Total number of compositions: 98 [2020-04-17 22:58:28,236 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 40 transitions, 200 flow [2020-04-17 22:58:34,879 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 55297 states. [2020-04-17 22:58:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 55297 states. [2020-04-17 22:58:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:58:34,880 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:34,880 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:58:34,880 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash 54894463, now seen corresponding path program 1 times [2020-04-17 22:58:34,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:34,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443985901] [2020-04-17 22:58:34,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:34,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443985901] [2020-04-17 22:58:34,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:58:34,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:58:34,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854676825] [2020-04-17 22:58:34,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:58:34,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:58:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:58:34,899 INFO L87 Difference]: Start difference. First operand 55297 states. Second operand 3 states. [2020-04-17 22:58:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:35,185 INFO L93 Difference]: Finished difference Result 55297 states and 222749 transitions. [2020-04-17 22:58:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:58:35,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:58:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:35,315 INFO L225 Difference]: With dead ends: 55297 [2020-04-17 22:58:35,316 INFO L226 Difference]: Without dead ends: 48734 [2020-04-17 22:58:35,316 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:58:36,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48734 states. [2020-04-17 22:58:36,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48734 to 48734. [2020-04-17 22:58:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48734 states. [2020-04-17 22:58:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48734 states to 48734 states and 198690 transitions. [2020-04-17 22:58:37,070 INFO L78 Accepts]: Start accepts. Automaton has 48734 states and 198690 transitions. Word has length 4 [2020-04-17 22:58:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:37,070 INFO L479 AbstractCegarLoop]: Abstraction has 48734 states and 198690 transitions. [2020-04-17 22:58:37,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 22:58:37,070 INFO L276 IsEmpty]: Start isEmpty. Operand 48734 states and 198690 transitions. [2020-04-17 22:58:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:58:37,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:37,071 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:37,071 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:37,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:37,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1411257051, now seen corresponding path program 1 times [2020-04-17 22:58:37,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:37,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959966748] [2020-04-17 22:58:37,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:37,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 22:58:37,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959966748] [2020-04-17 22:58:37,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:58:37,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:58:37,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004303033] [2020-04-17 22:58:37,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:58:37,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:37,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:58:37,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:58:37,093 INFO L87 Difference]: Start difference. First operand 48734 states and 198690 transitions. Second operand 4 states. [2020-04-17 22:58:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:37,382 INFO L93 Difference]: Finished difference Result 56827 states and 227865 transitions. [2020-04-17 22:58:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:58:37,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 22:58:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:37,533 INFO L225 Difference]: With dead ends: 56827 [2020-04-17 22:58:37,534 INFO L226 Difference]: Without dead ends: 56827 [2020-04-17 22:58:37,534 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:58:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2020-04-17 22:58:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 54781. [2020-04-17 22:58:41,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54781 states. [2020-04-17 22:58:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54781 states to 54781 states and 219674 transitions. [2020-04-17 22:58:41,969 INFO L78 Accepts]: Start accepts. Automaton has 54781 states and 219674 transitions. Word has length 10 [2020-04-17 22:58:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:41,969 INFO L479 AbstractCegarLoop]: Abstraction has 54781 states and 219674 transitions. [2020-04-17 22:58:41,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:58:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 54781 states and 219674 transitions. [2020-04-17 22:58:41,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 22:58:41,969 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:41,969 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:41,970 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:41,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:41,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1775097937, now seen corresponding path program 1 times [2020-04-17 22:58:41,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:41,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905439626] [2020-04-17 22:58:41,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:42,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:42,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905439626] [2020-04-17 22:58:42,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239866027] [2020-04-17 22:58:42,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:42,113 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 22:58:42,114 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:42,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:42,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 22:58:42,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095465503] [2020-04-17 22:58:42,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:58:42,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:42,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:58:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:58:42,141 INFO L87 Difference]: Start difference. First operand 54781 states and 219674 transitions. Second operand 10 states. [2020-04-17 22:58:44,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:44,707 INFO L93 Difference]: Finished difference Result 54779 states and 219669 transitions. [2020-04-17 22:58:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 22:58:44,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 22:58:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:44,851 INFO L225 Difference]: With dead ends: 54779 [2020-04-17 22:58:44,851 INFO L226 Difference]: Without dead ends: 54779 [2020-04-17 22:58:44,851 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:58:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54779 states. [2020-04-17 22:58:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54779 to 54779. [2020-04-17 22:58:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54779 states. [2020-04-17 22:58:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54779 states to 54779 states and 219669 transitions. [2020-04-17 22:58:46,378 INFO L78 Accepts]: Start accepts. Automaton has 54779 states and 219669 transitions. Word has length 17 [2020-04-17 22:58:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:46,379 INFO L479 AbstractCegarLoop]: Abstraction has 54779 states and 219669 transitions. [2020-04-17 22:58:46,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:58:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54779 states and 219669 transitions. [2020-04-17 22:58:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 22:58:46,379 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:46,379 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:46,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:46,580 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:46,580 INFO L82 PathProgramCache]: Analyzing trace with hash 911691700, now seen corresponding path program 1 times [2020-04-17 22:58:46,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:46,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174323038] [2020-04-17 22:58:46,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:46,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174323038] [2020-04-17 22:58:46,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061075688] [2020-04-17 22:58:46,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:46,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 22:58:46,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:46,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:46,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 22:58:46,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494726782] [2020-04-17 22:58:46,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:58:46,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:46,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:58:46,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:58:46,761 INFO L87 Difference]: Start difference. First operand 54779 states and 219669 transitions. Second operand 12 states. [2020-04-17 22:58:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:47,607 INFO L93 Difference]: Finished difference Result 54775 states and 219657 transitions. [2020-04-17 22:58:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:58:47,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 22:58:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:47,755 INFO L225 Difference]: With dead ends: 54775 [2020-04-17 22:58:47,755 INFO L226 Difference]: Without dead ends: 54775 [2020-04-17 22:58:47,755 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:58:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54775 states. [2020-04-17 22:58:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54775 to 54775. [2020-04-17 22:58:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54775 states. [2020-04-17 22:58:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54775 states to 54775 states and 219657 transitions. [2020-04-17 22:58:49,320 INFO L78 Accepts]: Start accepts. Automaton has 54775 states and 219657 transitions. Word has length 23 [2020-04-17 22:58:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:49,320 INFO L479 AbstractCegarLoop]: Abstraction has 54775 states and 219657 transitions. [2020-04-17 22:58:49,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:58:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 54775 states and 219657 transitions. [2020-04-17 22:58:49,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 22:58:49,321 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:49,322 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:49,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:49,525 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:49,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:49,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1882146136, now seen corresponding path program 1 times [2020-04-17 22:58:49,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:49,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913938447] [2020-04-17 22:58:49,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:49,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913938447] [2020-04-17 22:58:49,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053863267] [2020-04-17 22:58:49,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:49,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 22:58:49,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:49,753 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:49,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:49,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 22:58:49,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354163917] [2020-04-17 22:58:49,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:58:49,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:58:49,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:58:49,755 INFO L87 Difference]: Start difference. First operand 54775 states and 219657 transitions. Second operand 14 states. [2020-04-17 22:58:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:50,586 INFO L93 Difference]: Finished difference Result 54767 states and 219629 transitions. [2020-04-17 22:58:50,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:58:50,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 22:58:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:50,736 INFO L225 Difference]: With dead ends: 54767 [2020-04-17 22:58:50,736 INFO L226 Difference]: Without dead ends: 54767 [2020-04-17 22:58:50,736 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:58:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54767 states. [2020-04-17 22:58:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54767 to 54767. [2020-04-17 22:58:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54767 states. [2020-04-17 22:58:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54767 states to 54767 states and 219629 transitions. [2020-04-17 22:58:52,303 INFO L78 Accepts]: Start accepts. Automaton has 54767 states and 219629 transitions. Word has length 29 [2020-04-17 22:58:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:52,303 INFO L479 AbstractCegarLoop]: Abstraction has 54767 states and 219629 transitions. [2020-04-17 22:58:52,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:58:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 54767 states and 219629 transitions. [2020-04-17 22:58:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 22:58:52,305 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:52,305 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:52,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:52,508 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:52,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:52,508 INFO L82 PathProgramCache]: Analyzing trace with hash -290777765, now seen corresponding path program 1 times [2020-04-17 22:58:52,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:52,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5160719] [2020-04-17 22:58:52,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:52,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5160719] [2020-04-17 22:58:52,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503793709] [2020-04-17 22:58:52,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:52,706 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:58:52,707 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:52,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:52,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2020-04-17 22:58:52,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124123267] [2020-04-17 22:58:52,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:52,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:52,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:52,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:52,779 INFO L87 Difference]: Start difference. First operand 54767 states and 219629 transitions. Second operand 16 states. [2020-04-17 22:58:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:53,098 INFO L93 Difference]: Finished difference Result 54751 states and 219565 transitions. [2020-04-17 22:58:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:58:53,099 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-04-17 22:58:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:53,771 INFO L225 Difference]: With dead ends: 54751 [2020-04-17 22:58:53,772 INFO L226 Difference]: Without dead ends: 54751 [2020-04-17 22:58:53,772 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54751 states. [2020-04-17 22:58:55,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54751 to 54751. [2020-04-17 22:58:55,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54751 states. [2020-04-17 22:58:55,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54751 states to 54751 states and 219565 transitions. [2020-04-17 22:58:55,298 INFO L78 Accepts]: Start accepts. Automaton has 54751 states and 219565 transitions. Word has length 35 [2020-04-17 22:58:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:55,298 INFO L479 AbstractCegarLoop]: Abstraction has 54751 states and 219565 transitions. [2020-04-17 22:58:55,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 54751 states and 219565 transitions. [2020-04-17 22:58:55,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 22:58:55,301 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:55,301 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:55,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:55,505 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:55,505 INFO L82 PathProgramCache]: Analyzing trace with hash 460274813, now seen corresponding path program 1 times [2020-04-17 22:58:55,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:55,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769420603] [2020-04-17 22:58:55,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:55,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769420603] [2020-04-17 22:58:55,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651451729] [2020-04-17 22:58:55,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:55,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:58:55,726 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:55,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:55,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2020-04-17 22:58:55,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439864341] [2020-04-17 22:58:55,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 22:58:55,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:55,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 22:58:55,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:55,800 INFO L87 Difference]: Start difference. First operand 54751 states and 219565 transitions. Second operand 18 states. [2020-04-17 22:58:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:56,159 INFO L93 Difference]: Finished difference Result 54719 states and 219421 transitions. [2020-04-17 22:58:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:58:56,160 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-04-17 22:58:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:56,296 INFO L225 Difference]: With dead ends: 54719 [2020-04-17 22:58:56,296 INFO L226 Difference]: Without dead ends: 54719 [2020-04-17 22:58:56,297 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54719 states. [2020-04-17 22:58:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54719 to 54719. [2020-04-17 22:58:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54719 states. [2020-04-17 22:58:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54719 states to 54719 states and 219421 transitions. [2020-04-17 22:58:58,397 INFO L78 Accepts]: Start accepts. Automaton has 54719 states and 219421 transitions. Word has length 41 [2020-04-17 22:58:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:58,398 INFO L479 AbstractCegarLoop]: Abstraction has 54719 states and 219421 transitions. [2020-04-17 22:58:58,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 22:58:58,398 INFO L276 IsEmpty]: Start isEmpty. Operand 54719 states and 219421 transitions. [2020-04-17 22:58:58,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-17 22:58:58,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:58,404 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:58,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:58,608 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:58,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash -964712578, now seen corresponding path program 1 times [2020-04-17 22:58:58,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:58,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824470458] [2020-04-17 22:58:58,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:58,741 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:58,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824470458] [2020-04-17 22:58:58,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166072438] [2020-04-17 22:58:58,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:58,848 INFO L264 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:58:58,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:58:58,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:58,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2020-04-17 22:58:58,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019040264] [2020-04-17 22:58:58,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 22:58:58,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 22:58:58,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:58,938 INFO L87 Difference]: Start difference. First operand 54719 states and 219421 transitions. Second operand 20 states. [2020-04-17 22:58:59,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:59,321 INFO L93 Difference]: Finished difference Result 54655 states and 219101 transitions. [2020-04-17 22:58:59,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:58:59,321 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-04-17 22:58:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:59,455 INFO L225 Difference]: With dead ends: 54655 [2020-04-17 22:58:59,455 INFO L226 Difference]: Without dead ends: 54655 [2020-04-17 22:58:59,455 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:59:00,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54655 states. [2020-04-17 22:59:01,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54655 to 54655. [2020-04-17 22:59:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54655 states. [2020-04-17 22:59:01,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54655 states to 54655 states and 219101 transitions. [2020-04-17 22:59:01,491 INFO L78 Accepts]: Start accepts. Automaton has 54655 states and 219101 transitions. Word has length 47 [2020-04-17 22:59:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:01,491 INFO L479 AbstractCegarLoop]: Abstraction has 54655 states and 219101 transitions. [2020-04-17 22:59:01,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 22:59:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 54655 states and 219101 transitions. [2020-04-17 22:59:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-04-17 22:59:01,500 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:01,501 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:01,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:01,703 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1558950686, now seen corresponding path program 1 times [2020-04-17 22:59:01,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:01,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692535729] [2020-04-17 22:59:01,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:01,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692535729] [2020-04-17 22:59:01,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678763452] [2020-04-17 22:59:01,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:01,957 INFO L264 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:01,958 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 22:59:02,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:02,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2020-04-17 22:59:02,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712771803] [2020-04-17 22:59:02,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 22:59:02,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 22:59:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:02,110 INFO L87 Difference]: Start difference. First operand 54655 states and 219101 transitions. Second operand 22 states. [2020-04-17 22:59:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:02,466 INFO L93 Difference]: Finished difference Result 54527 states and 218397 transitions. [2020-04-17 22:59:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:59:02,466 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-04-17 22:59:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:02,610 INFO L225 Difference]: With dead ends: 54527 [2020-04-17 22:59:02,610 INFO L226 Difference]: Without dead ends: 54527 [2020-04-17 22:59:02,610 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54527 states. [2020-04-17 22:59:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54527 to 54527. [2020-04-17 22:59:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54527 states. [2020-04-17 22:59:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54527 states to 54527 states and 218397 transitions. [2020-04-17 22:59:04,839 INFO L78 Accepts]: Start accepts. Automaton has 54527 states and 218397 transitions. Word has length 53 [2020-04-17 22:59:04,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:04,839 INFO L479 AbstractCegarLoop]: Abstraction has 54527 states and 218397 transitions. [2020-04-17 22:59:04,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 22:59:04,839 INFO L276 IsEmpty]: Start isEmpty. Operand 54527 states and 218397 transitions. [2020-04-17 22:59:04,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-04-17 22:59:04,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:04,845 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:05,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:05,046 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:05,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1378182391, now seen corresponding path program 1 times [2020-04-17 22:59:05,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:05,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976750665] [2020-04-17 22:59:05,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:05,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:59:05,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 22:59:05,087 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 22:59:05,088 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 22:59:05,088 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 22:59:05,088 WARN L363 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 22:59:05,089 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-04-17 22:59:05,100 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,100 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,100 WARN L315 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,100 WARN L315 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,101 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,101 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,101 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,101 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,101 WARN L315 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,101 WARN L315 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,102 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,102 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,102 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,102 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,102 WARN L315 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,102 WARN L315 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,102 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,102 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,103 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,103 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,103 WARN L315 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,103 WARN L315 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,103 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,103 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,104 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,104 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,104 WARN L315 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,104 WARN L315 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,104 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,104 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,105 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,105 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,105 WARN L315 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,105 WARN L315 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,105 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,105 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,105 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,105 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,106 WARN L315 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,106 WARN L315 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,106 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,106 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,106 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,106 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,107 WARN L315 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,107 WARN L315 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,107 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,107 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,107 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,107 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,107 WARN L315 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,107 WARN L315 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,108 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,108 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,108 WARN L315 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,108 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,109 WARN L315 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,109 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,110 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,110 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,110 WARN L315 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,110 WARN L315 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,111 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,112 WARN L315 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,112 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,112 WARN L315 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,113 WARN L315 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,113 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,113 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,113 WARN L315 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,114 WARN L315 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,115 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,115 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,115 WARN L315 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,116 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,116 WARN L315 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,116 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,116 WARN L315 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,117 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,118 WARN L315 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,118 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,118 WARN L315 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,119 WARN L315 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,120 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,120 WARN L315 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,120 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,121 WARN L315 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,121 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,121 WARN L315 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,121 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:59:05,129 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 22:59:05,129 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:59:05,129 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:59:05,129 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:59:05,129 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:59:05,130 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:59:05,130 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:59:05,130 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:59:05,130 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:59:05,132 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 132 transitions, 408 flow [2020-04-17 22:59:05,132 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-04-17 22:59:07,661 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-04-17 22:59:07,661 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-04-17 22:59:07,803 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-04-17 22:59:08,211 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-04-17 22:59:10,439 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-04-17 22:59:10,439 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-04-17 22:59:10,574 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-04-17 22:59:10,930 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 5472 [2020-04-17 22:59:10,930 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:59:12,852 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-04-17 22:59:13,249 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-04-17 22:59:13,366 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-04-17 22:59:13,856 WARN L192 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-04-17 22:59:13,961 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 22:59:13,965 INFO L206 etLargeBlockEncoding]: Checked pairs total: 4378 [2020-04-17 22:59:13,965 INFO L214 etLargeBlockEncoding]: Total number of compositions: 98 [2020-04-17 22:59:13,966 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 43 transitions, 230 flow [2020-04-17 22:59:56,321 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 163089 states. [2020-04-17 22:59:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 163089 states. [2020-04-17 22:59:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 22:59:56,321 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:56,321 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 22:59:56,322 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:56,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:56,322 INFO L82 PathProgramCache]: Analyzing trace with hash 62348159, now seen corresponding path program 1 times [2020-04-17 22:59:56,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:56,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794229492] [2020-04-17 22:59:56,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:56,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794229492] [2020-04-17 22:59:56,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:59:56,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:59:56,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563920180] [2020-04-17 22:59:56,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 22:59:56,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:56,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 22:59:56,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 22:59:56,341 INFO L87 Difference]: Start difference. First operand 163089 states. Second operand 3 states. [2020-04-17 22:59:57,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:57,587 INFO L93 Difference]: Finished difference Result 163089 states and 717318 transitions. [2020-04-17 22:59:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 22:59:57,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 22:59:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:59,174 INFO L225 Difference]: With dead ends: 163089 [2020-04-17 22:59:59,174 INFO L226 Difference]: Without dead ends: 143404 [2020-04-17 22:59:59,174 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 23:00:08,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143404 states. [2020-04-17 23:00:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143404 to 143404. [2020-04-17 23:00:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143404 states. [2020-04-17 23:00:12,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143404 states to 143404 states and 638584 transitions. [2020-04-17 23:00:12,148 INFO L78 Accepts]: Start accepts. Automaton has 143404 states and 638584 transitions. Word has length 4 [2020-04-17 23:00:12,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:12,148 INFO L479 AbstractCegarLoop]: Abstraction has 143404 states and 638584 transitions. [2020-04-17 23:00:12,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 23:00:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 143404 states and 638584 transitions. [2020-04-17 23:00:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:00:12,148 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:12,149 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:12,149 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:12,149 INFO L82 PathProgramCache]: Analyzing trace with hash 288657511, now seen corresponding path program 1 times [2020-04-17 23:00:12,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:12,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638038866] [2020-04-17 23:00:12,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 23:00:12,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638038866] [2020-04-17 23:00:12,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:00:12,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 23:00:12,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285395038] [2020-04-17 23:00:12,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 23:00:12,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:12,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 23:00:12,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 23:00:12,171 INFO L87 Difference]: Start difference. First operand 143404 states and 638584 transitions. Second operand 4 states. [2020-04-17 23:00:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:19,727 INFO L93 Difference]: Finished difference Result 166667 states and 731394 transitions. [2020-04-17 23:00:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 23:00:19,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 23:00:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:20,252 INFO L225 Difference]: With dead ends: 166667 [2020-04-17 23:00:20,252 INFO L226 Difference]: Without dead ends: 166667 [2020-04-17 23:00:20,252 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 23:00:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166667 states. [2020-04-17 23:00:33,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166667 to 162061. [2020-04-17 23:00:33,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162061 states. [2020-04-17 23:00:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162061 states to 162061 states and 710659 transitions. [2020-04-17 23:00:35,313 INFO L78 Accepts]: Start accepts. Automaton has 162061 states and 710659 transitions. Word has length 10 [2020-04-17 23:00:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:35,313 INFO L479 AbstractCegarLoop]: Abstraction has 162061 states and 710659 transitions. [2020-04-17 23:00:35,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 23:00:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 162061 states and 710659 transitions. [2020-04-17 23:00:35,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:00:35,314 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:35,314 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:35,314 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:35,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:35,314 INFO L82 PathProgramCache]: Analyzing trace with hash 941132211, now seen corresponding path program 1 times [2020-04-17 23:00:35,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:35,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472161304] [2020-04-17 23:00:35,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:35,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472161304] [2020-04-17 23:00:35,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412034284] [2020-04-17 23:00:35,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:35,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 23:00:35,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 23:00:35,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:35,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 23:00:35,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001890522] [2020-04-17 23:00:35,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:00:35,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:00:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:00:35,502 INFO L87 Difference]: Start difference. First operand 162061 states and 710659 transitions. Second operand 10 states. [2020-04-17 23:00:42,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:42,527 INFO L93 Difference]: Finished difference Result 162059 states and 710654 transitions. [2020-04-17 23:00:42,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 23:00:42,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 23:00:42,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:43,041 INFO L225 Difference]: With dead ends: 162059 [2020-04-17 23:00:43,042 INFO L226 Difference]: Without dead ends: 162059 [2020-04-17 23:00:43,042 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:00:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162059 states. [2020-04-17 23:00:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162059 to 162059. [2020-04-17 23:00:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162059 states. [2020-04-17 23:00:50,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162059 states to 162059 states and 710654 transitions. [2020-04-17 23:00:50,978 INFO L78 Accepts]: Start accepts. Automaton has 162059 states and 710654 transitions. Word has length 17 [2020-04-17 23:00:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:50,979 INFO L479 AbstractCegarLoop]: Abstraction has 162059 states and 710654 transitions. [2020-04-17 23:00:50,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:00:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 162059 states and 710654 transitions. [2020-04-17 23:00:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:00:50,979 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:50,979 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:51,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:51,180 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash -220199302, now seen corresponding path program 1 times [2020-04-17 23:00:51,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:51,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020785835] [2020-04-17 23:00:51,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:52,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020785835] [2020-04-17 23:00:52,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087237086] [2020-04-17 23:00:52,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:52,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 23:00:52,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 23:00:52,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:52,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 23:00:52,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969437113] [2020-04-17 23:00:52,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:00:52,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:52,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:00:52,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:00:52,456 INFO L87 Difference]: Start difference. First operand 162059 states and 710654 transitions. Second operand 12 states. [2020-04-17 23:00:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:53,466 INFO L93 Difference]: Finished difference Result 162055 states and 710642 transitions. [2020-04-17 23:00:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 23:00:53,466 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 23:00:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:53,962 INFO L225 Difference]: With dead ends: 162055 [2020-04-17 23:00:53,963 INFO L226 Difference]: Without dead ends: 162055 [2020-04-17 23:00:53,963 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:01:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162055 states. [2020-04-17 23:01:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162055 to 162055. [2020-04-17 23:01:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162055 states. [2020-04-17 23:01:08,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162055 states to 162055 states and 710642 transitions. [2020-04-17 23:01:08,894 INFO L78 Accepts]: Start accepts. Automaton has 162055 states and 710642 transitions. Word has length 23 [2020-04-17 23:01:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:08,894 INFO L479 AbstractCegarLoop]: Abstraction has 162055 states and 710642 transitions. [2020-04-17 23:01:08,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:01:08,894 INFO L276 IsEmpty]: Start isEmpty. Operand 162055 states and 710642 transitions. [2020-04-17 23:01:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 23:01:08,895 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:08,895 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:09,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:09,096 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:09,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:09,096 INFO L82 PathProgramCache]: Analyzing trace with hash -406571168, now seen corresponding path program 1 times [2020-04-17 23:01:09,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:09,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204480876] [2020-04-17 23:01:09,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:09,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204480876] [2020-04-17 23:01:09,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471600055] [2020-04-17 23:01:09,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:09,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 23:01:09,294 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 23:01:09,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:09,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 23:01:09,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041373318] [2020-04-17 23:01:09,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:01:09,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:09,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:01:09,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:01:09,340 INFO L87 Difference]: Start difference. First operand 162055 states and 710642 transitions. Second operand 14 states. Received shutdown request... [2020-04-17 23:01:15,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 23:01:15,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:15,520 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 23:01:15,527 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 23:01:15,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 11:01:15 BasicIcfg [2020-04-17 23:01:15,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 23:01:15,529 INFO L168 Benchmark]: Toolchain (without parser) took 219016.08 ms. Allocated memory was 141.0 MB in the beginning and 3.9 GB in the end (delta: 3.8 GB). Free memory was 98.4 MB in the beginning and 2.6 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 7.1 GB. [2020-04-17 23:01:15,530 INFO L168 Benchmark]: CDTParser took 1.51 ms. Allocated memory is still 141.0 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-04-17 23:01:15,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 928.76 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 96.5 MB in the beginning and 119.8 MB in the end (delta: -23.3 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. [2020-04-17 23:01:15,531 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.47 ms. Allocated memory is still 200.8 MB. Free memory was 119.8 MB in the beginning and 117.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-04-17 23:01:15,531 INFO L168 Benchmark]: Boogie Preprocessor took 43.26 ms. Allocated memory is still 200.8 MB. Free memory was 117.0 MB in the beginning and 115.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 23:01:15,531 INFO L168 Benchmark]: RCFGBuilder took 544.69 ms. Allocated memory is still 200.8 MB. Free memory was 115.6 MB in the beginning and 89.8 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-04-17 23:01:15,532 INFO L168 Benchmark]: TraceAbstraction took 217408.10 ms. Allocated memory was 200.8 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 89.1 MB in the beginning and 2.6 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. [2020-04-17 23:01:15,538 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.51 ms. Allocated memory is still 141.0 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 928.76 ms. Allocated memory was 141.0 MB in the beginning and 200.8 MB in the end (delta: 59.8 MB). Free memory was 96.5 MB in the beginning and 119.8 MB in the end (delta: -23.3 MB). Peak memory consumption was 42.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 63.47 ms. Allocated memory is still 200.8 MB. Free memory was 119.8 MB in the beginning and 117.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.26 ms. Allocated memory is still 200.8 MB. Free memory was 117.0 MB in the beginning and 115.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 544.69 ms. Allocated memory is still 200.8 MB. Free memory was 115.6 MB in the beginning and 89.8 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217408.10 ms. Allocated memory was 200.8 MB in the beginning and 3.9 GB in the end (delta: 3.7 GB). Free memory was 89.1 MB in the beginning and 2.6 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.3 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.4s, 79 ProgramPointsBefore, 18 ProgramPointsAfterwards, 84 TransitionsBefore, 17 TransitionsAfterwards, 344 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 163 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 293 CheckedPairsTotal, 77 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.4s, 86 ProgramPointsBefore, 24 ProgramPointsAfterwards, 90 TransitionsBefore, 22 TransitionsAfterwards, 824 CoEnabledTransitionPairs, 8 FixpointIterations, 33 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 8 ConcurrentYvCompositions, 6 ChoiceCompositions, 391 VarBasedMoverChecksPositive, 15 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 676 CheckedPairsTotal, 79 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.4s, 93 ProgramPointsBefore, 28 ProgramPointsAfterwards, 96 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 8 FixpointIterations, 29 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 618 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1092 CheckedPairsTotal, 84 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.4s, 100 ProgramPointsBefore, 32 ProgramPointsAfterwards, 102 TransitionsBefore, 28 TransitionsAfterwards, 1872 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 903 VarBasedMoverChecksPositive, 26 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1730 CheckedPairsTotal, 84 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.6s, 107 ProgramPointsBefore, 36 ProgramPointsAfterwards, 108 TransitionsBefore, 31 TransitionsAfterwards, 2480 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 1168 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 1953 CheckedPairsTotal, 87 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.0s, 114 ProgramPointsBefore, 40 ProgramPointsAfterwards, 114 TransitionsBefore, 34 TransitionsAfterwards, 3144 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 1453 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2432 CheckedPairsTotal, 90 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.8s, 121 ProgramPointsBefore, 44 ProgramPointsAfterwards, 120 TransitionsBefore, 37 TransitionsAfterwards, 3864 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 1791 VarBasedMoverChecksPositive, 23 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 3124 CheckedPairsTotal, 95 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 5.7s, 128 ProgramPointsBefore, 48 ProgramPointsAfterwards, 126 TransitionsBefore, 40 TransitionsAfterwards, 4640 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 2195 VarBasedMoverChecksPositive, 33 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 3851 CheckedPairsTotal, 98 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 8.8s, 135 ProgramPointsBefore, 52 ProgramPointsAfterwards, 132 TransitionsBefore, 43 TransitionsAfterwards, 5472 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 2521 VarBasedMoverChecksPositive, 29 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 4378 CheckedPairsTotal, 98 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 1092]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1092). Cancelled while BasicCegarLoop was constructing difference of abstraction (162055states) and FLOYD_HOARE automaton (currently 6 states, 14 states before enhancement),while ReachableStatesComputation was computing reachable states (81509 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 76 locations, 1 error locations. Started 9 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 217.0s, OverallIterations: 57, TraceHistogramMax: 9, AutomataDifference: 38.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 84.5s, HoareTripleCheckerStatistics: 1421 SDtfs, 2187 SDslu, 4455 SDs, 0 SdLazy, 2410 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1140 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163089occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 77.8s AutomataMinimizationTime, 48 MinimizatonAttempts, 8176 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 2142 NumberOfCodeBlocks, 2142 NumberOfCodeBlocksAsserted, 88 NumberOfCheckSat, 1807 ConstructedInterpolants, 0 QuantifiedInterpolants, 331219 SizeOfPredicates, 31 NumberOfNonLiveVariables, 4469 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 80 InterpolantComputations, 18 PerfectInterpolantSequences, 71/1873 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 could not prove your program: Timeout Completed graceful shutdown