/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 23:21:43,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 23:21:44,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 23:21:44,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 23:21:44,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 23:21:44,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 23:21:44,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 23:21:44,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 23:21:44,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 23:21:44,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 23:21:44,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 23:21:44,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 23:21:44,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 23:21:44,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 23:21:44,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 23:21:44,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 23:21:44,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 23:21:44,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 23:21:44,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 23:21:44,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 23:21:44,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 23:21:44,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 23:21:44,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 23:21:44,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 23:21:44,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 23:21:44,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 23:21:44,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 23:21:44,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 23:21:44,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 23:21:44,114 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 23:21:44,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 23:21:44,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 23:21:44,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 23:21:44,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 23:21:44,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 23:21:44,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 23:21:44,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 23:21:44,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 23:21:44,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 23:21:44,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 23:21:44,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 23:21:44,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-11 23:21:44,175 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 23:21:44,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 23:21:44,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 23:21:44,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 23:21:44,178 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 23:21:44,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 23:21:44,178 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 23:21:44,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 23:21:44,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 23:21:44,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 23:21:44,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 23:21:44,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 23:21:44,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 23:21:44,181 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 23:21:44,182 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 23:21:44,182 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 23:21:44,182 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 23:21:44,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 23:21:44,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 23:21:44,183 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 23:21:44,183 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 23:21:44,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 23:21:44,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 23:21:44,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 23:21:44,184 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 23:21:44,184 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 23:21:44,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 23:21:44,185 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-11 23:21:44,185 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 23:21:44,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 23:21:44,185 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-11 23:21:44,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 23:21:44,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 23:21:44,631 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 23:21:44,633 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 23:21:44,634 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 23:21:44,635 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.oepc.i [2020-09-11 23:21:44,725 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68cddb3d0/8760b6fad01e480daab44dcb9fe08d75/FLAG40f64e819 [2020-09-11 23:21:45,326 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 23:21:45,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-wmm/safe001_tso.oepc.i [2020-09-11 23:21:45,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68cddb3d0/8760b6fad01e480daab44dcb9fe08d75/FLAG40f64e819 [2020-09-11 23:21:45,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/68cddb3d0/8760b6fad01e480daab44dcb9fe08d75 [2020-09-11 23:21:45,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 23:21:45,620 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 23:21:45,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 23:21:45,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 23:21:45,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 23:21:45,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:21:45" (1/1) ... [2020-09-11 23:21:45,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0f7ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:45, skipping insertion in model container [2020-09-11 23:21:45,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:21:45" (1/1) ... [2020-09-11 23:21:45,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 23:21:45,708 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 23:21:46,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 23:21:46,196 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 23:21:46,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 23:21:46,353 INFO L208 MainTranslator]: Completed translation [2020-09-11 23:21:46,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46 WrapperNode [2020-09-11 23:21:46,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 23:21:46,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 23:21:46,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 23:21:46,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 23:21:46,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 23:21:46,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 23:21:46,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 23:21:46,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 23:21:46,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... [2020-09-11 23:21:46,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 23:21:46,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 23:21:46,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 23:21:46,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 23:21:46,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 23:21:46,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 23:21:46,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 23:21:46,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 23:21:46,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 23:21:46,536 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-09-11 23:21:46,536 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-09-11 23:21:46,536 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-09-11 23:21:46,537 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-09-11 23:21:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-09-11 23:21:46,537 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-09-11 23:21:46,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 23:21:46,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 23:21:46,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 23:21:46,540 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 23:21:46,877 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 23:21:46,878 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-11 23:21:46,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:21:46 BoogieIcfgContainer [2020-09-11 23:21:46,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 23:21:46,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 23:21:46,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 23:21:46,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 23:21:46,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 11:21:45" (1/3) ... [2020-09-11 23:21:46,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784c3832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:21:46, skipping insertion in model container [2020-09-11 23:21:46,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:21:46" (2/3) ... [2020-09-11 23:21:46,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784c3832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:21:46, skipping insertion in model container [2020-09-11 23:21:46,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:21:46" (3/3) ... [2020-09-11 23:21:46,894 INFO L109 eAbstractionObserver]: Analyzing ICFG safe001_tso.oepc.i [2020-09-11 23:21:46,907 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 23:21:46,907 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 23:21:46,917 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 23:21:46,918 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 23:21:46,964 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,964 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,964 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,965 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,965 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,966 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,966 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,967 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,967 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,967 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,968 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,968 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,969 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,969 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,969 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,969 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,970 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,970 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,975 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,975 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,976 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,976 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,984 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,985 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,985 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,985 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,988 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,989 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,989 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:46,989 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:21:47,015 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-09-11 23:21:47,044 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 23:21:47,045 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 23:21:47,045 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 23:21:47,045 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-11 23:21:47,045 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 23:21:47,046 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 23:21:47,046 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 23:21:47,046 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 23:21:47,066 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 69 transitions, 153 flow [2020-09-11 23:21:47,069 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 69 transitions, 153 flow [2020-09-11 23:21:47,121 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2020-09-11 23:21:47,122 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 23:21:47,129 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 66 events. 2/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-09-11 23:21:47,132 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 69 transitions, 153 flow [2020-09-11 23:21:47,166 INFO L129 PetriNetUnfolder]: 2/66 cut-off events. [2020-09-11 23:21:47,166 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 23:21:47,167 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 66 events. 2/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-09-11 23:21:47,172 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1260 [2020-09-11 23:21:47,174 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 23:21:48,666 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-09-11 23:21:48,820 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2483 [2020-09-11 23:21:48,820 INFO L214 etLargeBlockEncoding]: Total number of compositions: 57 [2020-09-11 23:21:48,825 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 22 transitions, 59 flow [2020-09-11 23:21:48,853 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 298 states. [2020-09-11 23:21:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states. [2020-09-11 23:21:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 23:21:48,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:48,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:48,868 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:48,875 INFO L82 PathProgramCache]: Analyzing trace with hash -245765301, now seen corresponding path program 1 times [2020-09-11 23:21:48,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:48,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278084242] [2020-09-11 23:21:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:49,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:49,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278084242] [2020-09-11 23:21:49,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:49,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-11 23:21:49,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [927999168] [2020-09-11 23:21:49,144 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:49,148 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:49,163 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-11 23:21:49,163 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:49,166 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:21:49,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 23:21:49,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:49,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 23:21:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 23:21:49,196 INFO L87 Difference]: Start difference. First operand 298 states. Second operand 3 states. [2020-09-11 23:21:49,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:49,272 INFO L93 Difference]: Finished difference Result 290 states and 834 transitions. [2020-09-11 23:21:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 23:21:49,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-11 23:21:49,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:49,308 INFO L225 Difference]: With dead ends: 290 [2020-09-11 23:21:49,308 INFO L226 Difference]: Without dead ends: 226 [2020-09-11 23:21:49,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 23:21:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-11 23:21:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-09-11 23:21:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-11 23:21:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 626 transitions. [2020-09-11 23:21:49,411 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 626 transitions. Word has length 8 [2020-09-11 23:21:49,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:49,412 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 626 transitions. [2020-09-11 23:21:49,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 23:21:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 626 transitions. [2020-09-11 23:21:49,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 23:21:49,414 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:49,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:49,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 23:21:49,415 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:49,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:49,415 INFO L82 PathProgramCache]: Analyzing trace with hash 956609449, now seen corresponding path program 1 times [2020-09-11 23:21:49,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:49,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879089643] [2020-09-11 23:21:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:49,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879089643] [2020-09-11 23:21:49,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:49,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-11 23:21:49,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1970074645] [2020-09-11 23:21:49,521 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:49,522 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:49,524 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-09-11 23:21:49,525 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:49,553 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:21:49,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 23:21:49,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 23:21:49,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 23:21:49,556 INFO L87 Difference]: Start difference. First operand 226 states and 626 transitions. Second operand 3 states. [2020-09-11 23:21:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:49,564 INFO L93 Difference]: Finished difference Result 212 states and 578 transitions. [2020-09-11 23:21:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 23:21:49,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-09-11 23:21:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:49,567 INFO L225 Difference]: With dead ends: 212 [2020-09-11 23:21:49,567 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 23:21:49,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 23:21:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 23:21:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2020-09-11 23:21:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-11 23:21:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 578 transitions. [2020-09-11 23:21:49,585 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 578 transitions. Word has length 9 [2020-09-11 23:21:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:49,585 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 578 transitions. [2020-09-11 23:21:49,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 23:21:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 578 transitions. [2020-09-11 23:21:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 23:21:49,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:49,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:49,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 23:21:49,588 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash -409878926, now seen corresponding path program 1 times [2020-09-11 23:21:49,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:49,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919302918] [2020-09-11 23:21:49,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:49,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:49,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919302918] [2020-09-11 23:21:49,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:49,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 23:21:49,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1767343195] [2020-09-11 23:21:49,678 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:49,680 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:49,682 INFO L274 McrAutomatonBuilder]: Finished intersection with 17 states and 23 transitions. [2020-09-11 23:21:49,682 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:49,728 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:21:49,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 23:21:49,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 23:21:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 23:21:49,730 INFO L87 Difference]: Start difference. First operand 212 states and 578 transitions. Second operand 4 states. [2020-09-11 23:21:49,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:49,764 INFO L93 Difference]: Finished difference Result 242 states and 634 transitions. [2020-09-11 23:21:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 23:21:49,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-09-11 23:21:49,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:49,767 INFO L225 Difference]: With dead ends: 242 [2020-09-11 23:21:49,767 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 23:21:49,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:21:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 23:21:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-09-11 23:21:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 23:21:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-11 23:21:49,778 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 10 [2020-09-11 23:21:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:49,778 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-11 23:21:49,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 23:21:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-11 23:21:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 23:21:49,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:49,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:49,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 23:21:49,781 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:49,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:49,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1304596236, now seen corresponding path program 1 times [2020-09-11 23:21:49,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:49,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677232659] [2020-09-11 23:21:49,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:49,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677232659] [2020-09-11 23:21:49,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:49,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-09-11 23:21:49,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [732891813] [2020-09-11 23:21:49,858 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:49,859 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:49,861 INFO L274 McrAutomatonBuilder]: Finished intersection with 19 states and 25 transitions. [2020-09-11 23:21:49,861 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:49,905 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:21:49,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 23:21:49,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:49,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 23:21:49,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 23:21:49,906 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 3 states. [2020-09-11 23:21:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:49,913 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-09-11 23:21:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 23:21:49,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-11 23:21:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:49,915 INFO L225 Difference]: With dead ends: 140 [2020-09-11 23:21:49,915 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 23:21:49,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 23:21:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 23:21:49,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-09-11 23:21:49,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 23:21:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 343 transitions. [2020-09-11 23:21:49,925 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 343 transitions. Word has length 11 [2020-09-11 23:21:49,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:49,925 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 343 transitions. [2020-09-11 23:21:49,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 23:21:49,926 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 343 transitions. [2020-09-11 23:21:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 23:21:49,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:49,927 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:49,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 23:21:49,927 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:49,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1352113053, now seen corresponding path program 1 times [2020-09-11 23:21:49,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:49,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255798707] [2020-09-11 23:21:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:50,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255798707] [2020-09-11 23:21:50,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:50,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 23:21:50,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1576397146] [2020-09-11 23:21:50,003 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:50,005 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:50,029 INFO L274 McrAutomatonBuilder]: Finished intersection with 29 states and 47 transitions. [2020-09-11 23:21:50,029 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:50,244 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:21:50,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 23:21:50,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 23:21:50,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 23:21:50,246 INFO L87 Difference]: Start difference. First operand 140 states and 343 transitions. Second operand 4 states. [2020-09-11 23:21:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:50,273 INFO L93 Difference]: Finished difference Result 200 states and 485 transitions. [2020-09-11 23:21:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 23:21:50,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-11 23:21:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:50,275 INFO L225 Difference]: With dead ends: 200 [2020-09-11 23:21:50,275 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 23:21:50,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:21:50,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 23:21:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-09-11 23:21:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 23:21:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 265 transitions. [2020-09-11 23:21:50,295 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 265 transitions. Word has length 12 [2020-09-11 23:21:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:50,295 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 265 transitions. [2020-09-11 23:21:50,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 23:21:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 265 transitions. [2020-09-11 23:21:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 23:21:50,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:50,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:50,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 23:21:50,297 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2097233879, now seen corresponding path program 2 times [2020-09-11 23:21:50,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:50,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14825479] [2020-09-11 23:21:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:50,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14825479] [2020-09-11 23:21:50,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:50,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 23:21:50,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [502047785] [2020-09-11 23:21:50,404 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:50,405 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:50,408 INFO L274 McrAutomatonBuilder]: Finished intersection with 25 states and 37 transitions. [2020-09-11 23:21:50,408 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:50,457 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:21:50,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 23:21:50,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:50,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 23:21:50,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 23:21:50,458 INFO L87 Difference]: Start difference. First operand 110 states and 265 transitions. Second operand 4 states. [2020-09-11 23:21:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:50,483 INFO L93 Difference]: Finished difference Result 128 states and 298 transitions. [2020-09-11 23:21:50,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 23:21:50,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-11 23:21:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:50,485 INFO L225 Difference]: With dead ends: 128 [2020-09-11 23:21:50,485 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 23:21:50,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:21:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 23:21:50,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-09-11 23:21:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 23:21:50,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 144 transitions. [2020-09-11 23:21:50,489 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 144 transitions. Word has length 12 [2020-09-11 23:21:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:50,490 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 144 transitions. [2020-09-11 23:21:50,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 23:21:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 144 transitions. [2020-09-11 23:21:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 23:21:50,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:50,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:50,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-11 23:21:50,491 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 413415217, now seen corresponding path program 1 times [2020-09-11 23:21:50,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:50,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224641575] [2020-09-11 23:21:50,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:50,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:50,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224641575] [2020-09-11 23:21:50,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:50,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 23:21:50,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [360827002] [2020-09-11 23:21:50,597 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:50,598 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:50,602 INFO L274 McrAutomatonBuilder]: Finished intersection with 23 states and 31 transitions. [2020-09-11 23:21:50,603 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:50,650 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:21:50,688 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:21:50,699 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:21:50,711 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:21:50,726 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:21:50,743 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:21:50,757 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:21:50,763 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3724#(not (= 3 ~__unbuffered_cnt~0))] [2020-09-11 23:21:50,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 23:21:50,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:50,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 23:21:50,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:21:50,764 INFO L87 Difference]: Start difference. First operand 68 states and 144 transitions. Second operand 5 states. [2020-09-11 23:21:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:50,825 INFO L93 Difference]: Finished difference Result 67 states and 126 transitions. [2020-09-11 23:21:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 23:21:50,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-11 23:21:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:50,826 INFO L225 Difference]: With dead ends: 67 [2020-09-11 23:21:50,827 INFO L226 Difference]: Without dead ends: 45 [2020-09-11 23:21:50,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 23:21:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-11 23:21:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-11 23:21:50,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 23:21:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2020-09-11 23:21:50,830 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 13 [2020-09-11 23:21:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:50,830 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2020-09-11 23:21:50,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 23:21:50,830 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2020-09-11 23:21:50,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 23:21:50,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:50,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:50,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-11 23:21:50,832 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1126720068, now seen corresponding path program 1 times [2020-09-11 23:21:50,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:50,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386229144] [2020-09-11 23:21:50,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:50,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386229144] [2020-09-11 23:21:50,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:50,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 23:21:50,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [244578161] [2020-09-11 23:21:50,933 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:50,934 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:50,941 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 37 transitions. [2020-09-11 23:21:50,941 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:50,951 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:21:51,020 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3892#(<= ~__unbuffered_cnt~0 0)] [2020-09-11 23:21:51,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 23:21:51,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:51,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 23:21:51,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-11 23:21:51,022 INFO L87 Difference]: Start difference. First operand 45 states and 74 transitions. Second operand 7 states. [2020-09-11 23:21:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:51,078 INFO L93 Difference]: Finished difference Result 42 states and 66 transitions. [2020-09-11 23:21:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 23:21:51,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-09-11 23:21:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:51,079 INFO L225 Difference]: With dead ends: 42 [2020-09-11 23:21:51,079 INFO L226 Difference]: Without dead ends: 36 [2020-09-11 23:21:51,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-09-11 23:21:51,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-11 23:21:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-11 23:21:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-11 23:21:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 56 transitions. [2020-09-11 23:21:51,081 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 56 transitions. Word has length 15 [2020-09-11 23:21:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:51,082 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 56 transitions. [2020-09-11 23:21:51,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 23:21:51,082 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 56 transitions. [2020-09-11 23:21:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 23:21:51,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:21:51,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:21:51,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-11 23:21:51,083 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:21:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:21:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash 392863110, now seen corresponding path program 1 times [2020-09-11 23:21:51,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:21:51,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990155455] [2020-09-11 23:21:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:21:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:21:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:21:51,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990155455] [2020-09-11 23:21:51,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:21:51,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 23:21:51,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1141291495] [2020-09-11 23:21:51,128 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:21:51,129 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:21:51,132 INFO L274 McrAutomatonBuilder]: Finished intersection with 28 states and 37 transitions. [2020-09-11 23:21:51,133 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:21:51,136 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:21:51,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 23:21:51,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:21:51,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 23:21:51,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 23:21:51,137 INFO L87 Difference]: Start difference. First operand 36 states and 56 transitions. Second operand 3 states. [2020-09-11 23:21:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:21:51,141 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2020-09-11 23:21:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 23:21:51,142 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-11 23:21:51,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:21:51,142 INFO L225 Difference]: With dead ends: 35 [2020-09-11 23:21:51,143 INFO L226 Difference]: Without dead ends: 0 [2020-09-11 23:21:51,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 23:21:51,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-11 23:21:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-11 23:21:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-11 23:21:51,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-11 23:21:51,144 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-09-11 23:21:51,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:21:51,144 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-11 23:21:51,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 23:21:51,145 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-11 23:21:51,145 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-11 23:21:51,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-11 23:21:51,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 11:21:51 BasicIcfg [2020-09-11 23:21:51,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 23:21:51,152 INFO L168 Benchmark]: Toolchain (without parser) took 5536.51 ms. Allocated memory was 140.5 MB in the beginning and 244.8 MB in the end (delta: 104.3 MB). Free memory was 102.7 MB in the beginning and 92.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 114.6 MB. Max. memory is 7.1 GB. [2020-09-11 23:21:51,152 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 23:21:51,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 734.43 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 161.4 MB in the end (delta: -59.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-09-11 23:21:51,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.19 ms. Allocated memory is still 204.5 MB. Free memory was 161.4 MB in the beginning and 159.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 23:21:51,155 INFO L168 Benchmark]: Boogie Preprocessor took 29.54 ms. Allocated memory is still 204.5 MB. Free memory was 159.4 MB in the beginning and 157.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-11 23:21:51,156 INFO L168 Benchmark]: RCFGBuilder took 441.45 ms. Allocated memory is still 204.5 MB. Free memory was 157.4 MB in the beginning and 135.3 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-09-11 23:21:51,157 INFO L168 Benchmark]: TraceAbstraction took 4263.98 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 135.3 MB in the beginning and 92.4 MB in the end (delta: 42.9 MB). Peak memory consumption was 83.3 MB. Max. memory is 7.1 GB. [2020-09-11 23:21:51,161 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 734.43 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 161.4 MB in the end (delta: -59.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 57.19 ms. Allocated memory is still 204.5 MB. Free memory was 161.4 MB in the beginning and 159.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.54 ms. Allocated memory is still 204.5 MB. Free memory was 159.4 MB in the beginning and 157.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 441.45 ms. Allocated memory is still 204.5 MB. Free memory was 157.4 MB in the beginning and 135.3 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4263.98 ms. Allocated memory was 204.5 MB in the beginning and 244.8 MB in the end (delta: 40.4 MB). Free memory was 135.3 MB in the beginning and 92.4 MB in the end (delta: 42.9 MB). Peak memory consumption was 83.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.7s, 77 ProgramPointsBefore, 31 ProgramPointsAfterwards, 69 TransitionsBefore, 22 TransitionsAfterwards, 1260 CoEnabledTransitionPairs, 7 FixpointIterations, 13 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 656 VarBasedMoverChecksPositive, 23 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2483 CheckedPairsTotal, 57 TotalNumberOfCompositions - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 158 SDtfs, 104 SDslu, 167 SDs, 0 SdLazy, 102 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=298occurred 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 3150 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...