/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 13:48:12,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 13:48:12,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 13:48:12,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 13:48:12,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 13:48:12,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 13:48:12,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 13:48:12,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 13:48:12,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 13:48:12,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 13:48:12,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 13:48:12,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 13:48:12,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 13:48:12,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 13:48:12,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 13:48:12,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 13:48:12,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 13:48:13,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 13:48:13,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 13:48:13,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 13:48:13,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 13:48:13,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 13:48:13,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 13:48:13,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 13:48:13,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 13:48:13,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 13:48:13,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 13:48:13,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 13:48:13,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 13:48:13,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 13:48:13,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 13:48:13,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 13:48:13,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 13:48:13,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 13:48:13,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 13:48:13,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 13:48:13,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 13:48:13,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 13:48:13,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 13:48:13,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 13:48:13,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 13:48:13,035 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-09 13:48:13,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 13:48:13,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 13:48:13,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 13:48:13,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 13:48:13,083 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 13:48:13,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 13:48:13,084 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 13:48:13,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 13:48:13,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 13:48:13,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 13:48:13,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 13:48:13,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 13:48:13,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 13:48:13,086 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 13:48:13,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 13:48:13,087 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 13:48:13,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 13:48:13,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 13:48:13,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 13:48:13,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 13:48:13,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 13:48:13,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 13:48:13,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 13:48:13,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 13:48:13,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 13:48:13,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-09 13:48:13,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 13:48:13,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-09 13:48:13,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-09 13:48:13,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 13:48:13,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 13:48:13,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 13:48:13,384 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 13:48:13,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 13:48:13,386 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 13:48:13,387 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-10-09 13:48:13,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fb8719b/a6681cbe502847cdbf13c70abb64c735/FLAG7aa11f90b [2020-10-09 13:48:13,953 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 13:48:13,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-10-09 13:48:13,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fb8719b/a6681cbe502847cdbf13c70abb64c735/FLAG7aa11f90b [2020-10-09 13:48:14,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1fb8719b/a6681cbe502847cdbf13c70abb64c735 [2020-10-09 13:48:14,311 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 13:48:14,313 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 13:48:14,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 13:48:14,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 13:48:14,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 13:48:14,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 01:48:14" (1/1) ... [2020-10-09 13:48:14,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9cc404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:14, skipping insertion in model container [2020-10-09 13:48:14,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 01:48:14" (1/1) ... [2020-10-09 13:48:14,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 13:48:14,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 13:48:14,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 13:48:14,900 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 13:48:14,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 13:48:15,048 INFO L208 MainTranslator]: Completed translation [2020-10-09 13:48:15,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15 WrapperNode [2020-10-09 13:48:15,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 13:48:15,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 13:48:15,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 13:48:15,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 13:48:15,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 13:48:15,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 13:48:15,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 13:48:15,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 13:48:15,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... [2020-10-09 13:48:15,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 13:48:15,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 13:48:15,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 13:48:15,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 13:48:15,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 13:48:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-09 13:48:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-09 13:48:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 13:48:15,201 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-10-09 13:48:15,201 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-10-09 13:48:15,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 13:48:15,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 13:48:15,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 13:48:15,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 13:48:15,204 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 13:48:15,563 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 13:48:15,563 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-09 13:48:15,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 01:48:15 BoogieIcfgContainer [2020-10-09 13:48:15,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 13:48:15,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 13:48:15,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 13:48:15,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 13:48:15,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 01:48:14" (1/3) ... [2020-10-09 13:48:15,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2b39ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 01:48:15, skipping insertion in model container [2020-10-09 13:48:15,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 01:48:15" (2/3) ... [2020-10-09 13:48:15,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2b39ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 01:48:15, skipping insertion in model container [2020-10-09 13:48:15,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 01:48:15" (3/3) ... [2020-10-09 13:48:15,574 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-1.i [2020-10-09 13:48:15,584 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-09 13:48:15,584 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 13:48:15,591 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 13:48:15,591 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 13:48:15,613 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,613 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,614 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,615 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,616 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,616 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,616 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,620 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,620 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,620 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,621 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,621 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:15,650 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 13:48:15,671 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 13:48:15,671 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 13:48:15,672 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 13:48:15,672 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 13:48:15,672 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 13:48:15,672 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 13:48:15,672 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 13:48:15,672 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 13:48:15,685 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 13:48:15,688 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 71 transitions, 150 flow [2020-10-09 13:48:15,691 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 71 transitions, 150 flow [2020-10-09 13:48:15,692 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-10-09 13:48:15,740 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-10-09 13:48:15,741 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 13:48:15,745 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 103 events. 12/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2020-10-09 13:48:15,747 INFO L117 LiptonReduction]: Number of co-enabled transitions 370 [2020-10-09 13:48:17,074 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-09 13:48:17,323 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-09 13:48:17,515 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-09 13:48:17,586 INFO L132 LiptonReduction]: Checked pairs total: 397 [2020-10-09 13:48:17,587 INFO L134 LiptonReduction]: Total number of compositions: 71 [2020-10-09 13:48:17,595 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 14 transitions, 36 flow [2020-10-09 13:48:17,603 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 27 states. [2020-10-09 13:48:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-09 13:48:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-09 13:48:17,612 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:17,613 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-09 13:48:17,614 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash 8680406, now seen corresponding path program 1 times [2020-10-09 13:48:17,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:17,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588125659] [2020-10-09 13:48:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:48:17,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588125659] [2020-10-09 13:48:17,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:17,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 13:48:17,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311367516] [2020-10-09 13:48:17,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:48:17,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:17,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:48:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:48:17,859 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-09 13:48:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:17,898 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-10-09 13:48:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:48:17,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-09 13:48:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:17,910 INFO L225 Difference]: With dead ends: 27 [2020-10-09 13:48:17,910 INFO L226 Difference]: Without dead ends: 23 [2020-10-09 13:48:17,911 INFO L673 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 [2020-10-09 13:48:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-09 13:48:17,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-09 13:48:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-09 13:48:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2020-10-09 13:48:17,947 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 4 [2020-10-09 13:48:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:17,947 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2020-10-09 13:48:17,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:48:17,947 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2020-10-09 13:48:17,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-09 13:48:17,948 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:17,948 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-10-09 13:48:17,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-09 13:48:17,949 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:17,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:17,949 INFO L82 PathProgramCache]: Analyzing trace with hash -256835414, now seen corresponding path program 1 times [2020-10-09 13:48:17,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:17,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371590971] [2020-10-09 13:48:17,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:17,983 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:18,001 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:18,023 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-09 13:48:18,023 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 13:48:18,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-09 13:48:18,024 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-09 13:48:18,026 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 13:48:18,026 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-09 13:48:18,032 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,033 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,033 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,033 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,033 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,034 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,034 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,034 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,034 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,034 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,035 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,035 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,035 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,035 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,036 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,036 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,036 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,036 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,037 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,040 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,041 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,041 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,041 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,041 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:18,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 13:48:18,047 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 13:48:18,047 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 13:48:18,047 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 13:48:18,047 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 13:48:18,048 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 13:48:18,048 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 13:48:18,048 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 13:48:18,048 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 13:48:18,050 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 13:48:18,050 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 78 transitions, 174 flow [2020-10-09 13:48:18,050 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 78 transitions, 174 flow [2020-10-09 13:48:18,050 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-10-09 13:48:18,084 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-10-09 13:48:18,084 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-09 13:48:18,086 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 183 events. 23/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2020-10-09 13:48:18,089 INFO L117 LiptonReduction]: Number of co-enabled transitions 900 [2020-10-09 13:48:19,218 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-09 13:48:19,497 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-09 13:48:19,603 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-09 13:48:19,745 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-09 13:48:19,816 INFO L132 LiptonReduction]: Checked pairs total: 2415 [2020-10-09 13:48:19,816 INFO L134 LiptonReduction]: Total number of compositions: 67 [2020-10-09 13:48:19,816 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 23 transitions, 64 flow [2020-10-09 13:48:19,829 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 242 states. [2020-10-09 13:48:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states. [2020-10-09 13:48:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-09 13:48:19,830 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:19,830 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-09 13:48:19,830 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash 13452069, now seen corresponding path program 1 times [2020-10-09 13:48:19,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:19,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856335914] [2020-10-09 13:48:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:48:19,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856335914] [2020-10-09 13:48:19,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:19,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 13:48:19,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238687469] [2020-10-09 13:48:19,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:48:19,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:19,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:48:19,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:48:19,875 INFO L87 Difference]: Start difference. First operand 242 states. Second operand 3 states. [2020-10-09 13:48:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:19,912 INFO L93 Difference]: Finished difference Result 242 states and 550 transitions. [2020-10-09 13:48:19,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:48:19,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-09 13:48:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:19,918 INFO L225 Difference]: With dead ends: 242 [2020-10-09 13:48:19,918 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 13:48:19,919 INFO L673 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 [2020-10-09 13:48:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 13:48:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-09 13:48:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-09 13:48:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 494 transitions. [2020-10-09 13:48:19,948 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 494 transitions. Word has length 4 [2020-10-09 13:48:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:19,948 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 494 transitions. [2020-10-09 13:48:19,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:48:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 494 transitions. [2020-10-09 13:48:19,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 13:48:19,950 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:19,950 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:48:19,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-09 13:48:19,950 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:19,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:19,950 INFO L82 PathProgramCache]: Analyzing trace with hash 76722491, now seen corresponding path program 1 times [2020-10-09 13:48:19,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:19,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653353032] [2020-10-09 13:48:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 13:48:20,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653353032] [2020-10-09 13:48:20,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:20,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 13:48:20,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733643324] [2020-10-09 13:48:20,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 13:48:20,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:20,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 13:48:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 13:48:20,018 INFO L87 Difference]: Start difference. First operand 216 states and 494 transitions. Second operand 4 states. [2020-10-09 13:48:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:20,065 INFO L93 Difference]: Finished difference Result 203 states and 426 transitions. [2020-10-09 13:48:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 13:48:20,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-09 13:48:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:20,068 INFO L225 Difference]: With dead ends: 203 [2020-10-09 13:48:20,069 INFO L226 Difference]: Without dead ends: 203 [2020-10-09 13:48:20,070 INFO L673 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 [2020-10-09 13:48:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-09 13:48:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 197. [2020-10-09 13:48:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-09 13:48:20,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 420 transitions. [2020-10-09 13:48:20,092 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 420 transitions. Word has length 8 [2020-10-09 13:48:20,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:20,093 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 420 transitions. [2020-10-09 13:48:20,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 13:48:20,093 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 420 transitions. [2020-10-09 13:48:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 13:48:20,094 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:20,094 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-10-09 13:48:20,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-09 13:48:20,095 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:20,095 INFO L82 PathProgramCache]: Analyzing trace with hash 94633273, now seen corresponding path program 1 times [2020-10-09 13:48:20,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:20,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517802301] [2020-10-09 13:48:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:20,114 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:20,128 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:20,137 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-09 13:48:20,137 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 13:48:20,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-09 13:48:20,138 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-09 13:48:20,139 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 13:48:20,140 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-09 13:48:20,152 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,153 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,153 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,153 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,153 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,154 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,154 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,155 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,155 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,155 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,155 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,156 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,156 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,156 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,156 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,156 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,157 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,157 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,157 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,157 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,157 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,158 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,158 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,158 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,159 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,159 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,162 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,163 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,163 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,163 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,163 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,166 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,167 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,167 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,167 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,167 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:20,176 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 13:48:20,176 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 13:48:20,176 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 13:48:20,176 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 13:48:20,176 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 13:48:20,176 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 13:48:20,177 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 13:48:20,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 13:48:20,177 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 13:48:20,178 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 13:48:20,178 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 85 transitions, 200 flow [2020-10-09 13:48:20,179 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 85 transitions, 200 flow [2020-10-09 13:48:20,179 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-10-09 13:48:20,229 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-10-09 13:48:20,229 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-09 13:48:20,230 INFO L80 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 330 events. 45/330 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1086 event pairs, 1 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 191. Up to 16 conditions per place. [2020-10-09 13:48:20,235 INFO L117 LiptonReduction]: Number of co-enabled transitions 1470 [2020-10-09 13:48:21,590 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-09 13:48:21,687 INFO L132 LiptonReduction]: Checked pairs total: 4432 [2020-10-09 13:48:21,688 INFO L134 LiptonReduction]: Total number of compositions: 73 [2020-10-09 13:48:21,689 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 86 flow [2020-10-09 13:48:21,754 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1150 states. [2020-10-09 13:48:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states. [2020-10-09 13:48:21,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-09 13:48:21,755 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:21,755 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-09 13:48:21,755 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:21,758 INFO L82 PathProgramCache]: Analyzing trace with hash 18528206, now seen corresponding path program 1 times [2020-10-09 13:48:21,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:21,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372916737] [2020-10-09 13:48:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:48:21,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372916737] [2020-10-09 13:48:21,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:21,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 13:48:21,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357010574] [2020-10-09 13:48:21,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:48:21,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:21,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:48:21,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:48:21,815 INFO L87 Difference]: Start difference. First operand 1150 states. Second operand 3 states. [2020-10-09 13:48:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:21,855 INFO L93 Difference]: Finished difference Result 1150 states and 3360 transitions. [2020-10-09 13:48:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:48:21,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-09 13:48:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:21,867 INFO L225 Difference]: With dead ends: 1150 [2020-10-09 13:48:21,867 INFO L226 Difference]: Without dead ends: 1024 [2020-10-09 13:48:21,867 INFO L673 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 [2020-10-09 13:48:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-10-09 13:48:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2020-10-09 13:48:21,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-10-09 13:48:21,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3009 transitions. [2020-10-09 13:48:21,932 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3009 transitions. Word has length 4 [2020-10-09 13:48:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:21,933 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 3009 transitions. [2020-10-09 13:48:21,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:48:21,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3009 transitions. [2020-10-09 13:48:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 13:48:21,933 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:21,934 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:48:21,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-09 13:48:21,934 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:21,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:21,934 INFO L82 PathProgramCache]: Analyzing trace with hash 949696130, now seen corresponding path program 1 times [2020-10-09 13:48:21,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:21,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338726056] [2020-10-09 13:48:21,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 13:48:21,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338726056] [2020-10-09 13:48:21,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:21,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 13:48:21,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155518491] [2020-10-09 13:48:21,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 13:48:21,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:21,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 13:48:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 13:48:21,979 INFO L87 Difference]: Start difference. First operand 1024 states and 3009 transitions. Second operand 4 states. [2020-10-09 13:48:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:22,021 INFO L93 Difference]: Finished difference Result 1015 states and 2784 transitions. [2020-10-09 13:48:22,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 13:48:22,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-09 13:48:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:22,029 INFO L225 Difference]: With dead ends: 1015 [2020-10-09 13:48:22,030 INFO L226 Difference]: Without dead ends: 1015 [2020-10-09 13:48:22,030 INFO L673 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 [2020-10-09 13:48:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-10-09 13:48:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 977. [2020-10-09 13:48:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-10-09 13:48:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2718 transitions. [2020-10-09 13:48:22,094 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2718 transitions. Word has length 8 [2020-10-09 13:48:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 2718 transitions. [2020-10-09 13:48:22,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 13:48:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2718 transitions. [2020-10-09 13:48:22,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-09 13:48:22,097 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:22,097 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2020-10-09 13:48:22,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-09 13:48:22,098 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash -515475845, now seen corresponding path program 1 times [2020-10-09 13:48:22,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:22,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259755772] [2020-10-09 13:48:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:22,114 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:22,125 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:22,135 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-09 13:48:22,136 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 13:48:22,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-09 13:48:22,136 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-09 13:48:22,136 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 13:48:22,137 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-09 13:48:22,146 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,147 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,147 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,147 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,147 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,147 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,148 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,148 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,148 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,148 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,148 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,148 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,149 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,149 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,149 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,149 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,149 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,149 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,150 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,150 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,150 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,150 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,150 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,150 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,151 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,151 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,151 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,151 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,151 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,152 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,152 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,152 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,152 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,153 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,154 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,154 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,154 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,154 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,155 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,155 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,155 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,156 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,156 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,157 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,158 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,158 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,158 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,158 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:22,162 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 13:48:22,162 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 13:48:22,162 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 13:48:22,162 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 13:48:22,162 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 13:48:22,162 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 13:48:22,163 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 13:48:22,163 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 13:48:22,163 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 13:48:22,164 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 13:48:22,164 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 92 transitions, 228 flow [2020-10-09 13:48:22,165 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 92 transitions, 228 flow [2020-10-09 13:48:22,165 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-10-09 13:48:22,241 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-10-09 13:48:22,241 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-09 13:48:22,244 INFO L80 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 613 events. 91/613 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2732 event pairs, 6 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 350. Up to 32 conditions per place. [2020-10-09 13:48:22,261 INFO L117 LiptonReduction]: Number of co-enabled transitions 2120 [2020-10-09 13:48:23,782 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-09 13:48:23,882 INFO L132 LiptonReduction]: Checked pairs total: 7163 [2020-10-09 13:48:23,882 INFO L134 LiptonReduction]: Total number of compositions: 73 [2020-10-09 13:48:23,882 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 110 flow [2020-10-09 13:48:24,185 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 5482 states. [2020-10-09 13:48:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states. [2020-10-09 13:48:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-09 13:48:24,186 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:24,186 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-09 13:48:24,186 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:24,186 INFO L82 PathProgramCache]: Analyzing trace with hash 23824947, now seen corresponding path program 1 times [2020-10-09 13:48:24,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:24,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552819885] [2020-10-09 13:48:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:48:24,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552819885] [2020-10-09 13:48:24,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:24,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 13:48:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965316190] [2020-10-09 13:48:24,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:48:24,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:48:24,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:48:24,207 INFO L87 Difference]: Start difference. First operand 5482 states. Second operand 3 states. [2020-10-09 13:48:24,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:24,291 INFO L93 Difference]: Finished difference Result 5482 states and 19554 transitions. [2020-10-09 13:48:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:48:24,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-09 13:48:24,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:24,333 INFO L225 Difference]: With dead ends: 5482 [2020-10-09 13:48:24,334 INFO L226 Difference]: Without dead ends: 4856 [2020-10-09 13:48:24,334 INFO L673 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 [2020-10-09 13:48:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-10-09 13:48:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2020-10-09 13:48:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-10-09 13:48:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 17428 transitions. [2020-10-09 13:48:24,574 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 17428 transitions. Word has length 4 [2020-10-09 13:48:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:24,574 INFO L481 AbstractCegarLoop]: Abstraction has 4856 states and 17428 transitions. [2020-10-09 13:48:24,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:48:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 17428 transitions. [2020-10-09 13:48:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 13:48:24,576 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:24,577 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:48:24,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-09 13:48:24,577 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:24,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:24,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1205655351, now seen corresponding path program 1 times [2020-10-09 13:48:24,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:24,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534996198] [2020-10-09 13:48:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 13:48:24,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534996198] [2020-10-09 13:48:24,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:24,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 13:48:24,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613490838] [2020-10-09 13:48:24,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 13:48:24,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 13:48:24,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 13:48:24,636 INFO L87 Difference]: Start difference. First operand 4856 states and 17428 transitions. Second operand 4 states. [2020-10-09 13:48:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:24,717 INFO L93 Difference]: Finished difference Result 4995 states and 16978 transitions. [2020-10-09 13:48:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 13:48:24,717 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-09 13:48:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:24,757 INFO L225 Difference]: With dead ends: 4995 [2020-10-09 13:48:24,757 INFO L226 Difference]: Without dead ends: 4995 [2020-10-09 13:48:24,760 INFO L673 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 [2020-10-09 13:48:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2020-10-09 13:48:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 4797. [2020-10-09 13:48:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4797 states. [2020-10-09 13:48:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4797 states to 4797 states and 16480 transitions. [2020-10-09 13:48:25,156 INFO L78 Accepts]: Start accepts. Automaton has 4797 states and 16480 transitions. Word has length 8 [2020-10-09 13:48:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:25,156 INFO L481 AbstractCegarLoop]: Abstraction has 4797 states and 16480 transitions. [2020-10-09 13:48:25,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 13:48:25,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4797 states and 16480 transitions. [2020-10-09 13:48:25,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 13:48:25,163 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:25,163 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:48:25,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-09 13:48:25,164 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:25,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:25,164 INFO L82 PathProgramCache]: Analyzing trace with hash 172994846, now seen corresponding path program 1 times [2020-10-09 13:48:25,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:25,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58421203] [2020-10-09 13:48:25,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:48:25,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58421203] [2020-10-09 13:48:25,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740001413] [2020-10-09 13:48:25,228 INFO L95 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 [2020-10-09 13:48:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:25,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 13:48:25,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:48:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:48:25,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:48:25,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-09 13:48:25,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550137908] [2020-10-09 13:48:25,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 13:48:25,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 13:48:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:48:25,369 INFO L87 Difference]: Start difference. First operand 4797 states and 16480 transitions. Second operand 6 states. [2020-10-09 13:48:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:25,439 INFO L93 Difference]: Finished difference Result 4793 states and 16469 transitions. [2020-10-09 13:48:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 13:48:25,440 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-09 13:48:25,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:25,491 INFO L225 Difference]: With dead ends: 4793 [2020-10-09 13:48:25,491 INFO L226 Difference]: Without dead ends: 4793 [2020-10-09 13:48:25,491 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:48:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2020-10-09 13:48:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 4793. [2020-10-09 13:48:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4793 states. [2020-10-09 13:48:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 16469 transitions. [2020-10-09 13:48:25,684 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 16469 transitions. Word has length 16 [2020-10-09 13:48:25,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:25,684 INFO L481 AbstractCegarLoop]: Abstraction has 4793 states and 16469 transitions. [2020-10-09 13:48:25,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 13:48:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 16469 transitions. [2020-10-09 13:48:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-09 13:48:25,687 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:25,687 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-09 13:48:25,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-09 13:48:25,903 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1534304145, now seen corresponding path program 1 times [2020-10-09 13:48:25,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:25,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826456946] [2020-10-09 13:48:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:25,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:25,940 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:25,958 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-09 13:48:25,959 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 13:48:25,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-09 13:48:25,959 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-09 13:48:25,960 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 13:48:25,960 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-09 13:48:25,969 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,969 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,969 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,969 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,969 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,970 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,970 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,970 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,970 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,970 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,970 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,971 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,971 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,971 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,971 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,971 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,971 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,972 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,972 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,972 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,973 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,973 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,973 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,974 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,974 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,974 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,974 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,974 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,974 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,975 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,975 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,975 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,975 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,975 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,975 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,976 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,976 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,976 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,976 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,978 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,979 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,980 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,980 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,980 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,980 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,981 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,981 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,981 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,982 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,982 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,983 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,983 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,983 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,983 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,983 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,984 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,985 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,985 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,985 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,985 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:25,990 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 13:48:25,990 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 13:48:25,991 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 13:48:25,991 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 13:48:25,991 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 13:48:25,991 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 13:48:25,991 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 13:48:25,991 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 13:48:25,991 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 13:48:25,993 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 13:48:25,993 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 258 flow [2020-10-09 13:48:25,993 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 258 flow [2020-10-09 13:48:25,993 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-10-09 13:48:26,125 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-10-09 13:48:26,125 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-09 13:48:26,130 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1172 events. 189/1172 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6706 event pairs, 23 based on Foata normal form. 0/967 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2020-10-09 13:48:26,154 INFO L117 LiptonReduction]: Number of co-enabled transitions 2850 [2020-10-09 13:48:27,515 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-09 13:48:27,924 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-09 13:48:28,018 INFO L132 LiptonReduction]: Checked pairs total: 9531 [2020-10-09 13:48:28,018 INFO L134 LiptonReduction]: Total number of compositions: 75 [2020-10-09 13:48:28,019 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 38 transitions, 136 flow [2020-10-09 13:48:30,245 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 26310 states. [2020-10-09 13:48:30,246 INFO L276 IsEmpty]: Start isEmpty. Operand 26310 states. [2020-10-09 13:48:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-09 13:48:30,246 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:30,246 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-09 13:48:30,246 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:30,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash 29336307, now seen corresponding path program 1 times [2020-10-09 13:48:30,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:30,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033042240] [2020-10-09 13:48:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:48:30,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033042240] [2020-10-09 13:48:30,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:30,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 13:48:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068370208] [2020-10-09 13:48:30,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:48:30,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:48:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:48:30,261 INFO L87 Difference]: Start difference. First operand 26310 states. Second operand 3 states. [2020-10-09 13:48:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:30,454 INFO L93 Difference]: Finished difference Result 26310 states and 110676 transitions. [2020-10-09 13:48:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:48:30,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-09 13:48:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:30,577 INFO L225 Difference]: With dead ends: 26310 [2020-10-09 13:48:30,577 INFO L226 Difference]: Without dead ends: 23184 [2020-10-09 13:48:30,577 INFO L673 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 [2020-10-09 13:48:30,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23184 states. [2020-10-09 13:48:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23184 to 23184. [2020-10-09 13:48:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23184 states. [2020-10-09 13:48:32,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23184 states to 23184 states and 98175 transitions. [2020-10-09 13:48:32,498 INFO L78 Accepts]: Start accepts. Automaton has 23184 states and 98175 transitions. Word has length 4 [2020-10-09 13:48:32,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:32,498 INFO L481 AbstractCegarLoop]: Abstraction has 23184 states and 98175 transitions. [2020-10-09 13:48:32,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:48:32,498 INFO L276 IsEmpty]: Start isEmpty. Operand 23184 states and 98175 transitions. [2020-10-09 13:48:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 13:48:32,499 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:32,499 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:48:32,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-09 13:48:32,499 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:32,499 INFO L82 PathProgramCache]: Analyzing trace with hash 805936127, now seen corresponding path program 1 times [2020-10-09 13:48:32,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:32,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189396094] [2020-10-09 13:48:32,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 13:48:32,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189396094] [2020-10-09 13:48:32,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:48:32,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 13:48:32,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943969907] [2020-10-09 13:48:32,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 13:48:32,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:32,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 13:48:32,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 13:48:32,528 INFO L87 Difference]: Start difference. First operand 23184 states and 98175 transitions. Second operand 4 states. [2020-10-09 13:48:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:32,683 INFO L93 Difference]: Finished difference Result 24543 states and 99524 transitions. [2020-10-09 13:48:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 13:48:32,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-09 13:48:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:32,788 INFO L225 Difference]: With dead ends: 24543 [2020-10-09 13:48:32,788 INFO L226 Difference]: Without dead ends: 24543 [2020-10-09 13:48:32,788 INFO L673 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 [2020-10-09 13:48:33,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24543 states. [2020-10-09 13:48:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24543 to 23577. [2020-10-09 13:48:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23577 states. [2020-10-09 13:48:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23577 states to 23577 states and 96338 transitions. [2020-10-09 13:48:33,968 INFO L78 Accepts]: Start accepts. Automaton has 23577 states and 96338 transitions. Word has length 8 [2020-10-09 13:48:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:33,968 INFO L481 AbstractCegarLoop]: Abstraction has 23577 states and 96338 transitions. [2020-10-09 13:48:33,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 13:48:33,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23577 states and 96338 transitions. [2020-10-09 13:48:33,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 13:48:33,969 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:33,970 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:48:33,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-09 13:48:33,970 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:33,970 INFO L82 PathProgramCache]: Analyzing trace with hash -447719219, now seen corresponding path program 1 times [2020-10-09 13:48:33,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:33,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16937666] [2020-10-09 13:48:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:48:34,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16937666] [2020-10-09 13:48:34,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695074918] [2020-10-09 13:48:34,016 INFO L95 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 [2020-10-09 13:48:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:48:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 13:48:34,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:48:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:48:34,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:48:34,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-10-09 13:48:34,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511276961] [2020-10-09 13:48:34,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-09 13:48:34,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:48:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-09 13:48:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-09 13:48:34,109 INFO L87 Difference]: Start difference. First operand 23577 states and 96338 transitions. Second operand 7 states. [2020-10-09 13:48:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:48:34,262 INFO L93 Difference]: Finished difference Result 22356 states and 87745 transitions. [2020-10-09 13:48:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 13:48:34,262 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-09 13:48:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:48:34,348 INFO L225 Difference]: With dead ends: 22356 [2020-10-09 13:48:34,348 INFO L226 Difference]: Without dead ends: 22356 [2020-10-09 13:48:34,349 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-09 13:48:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22356 states. [2020-10-09 13:48:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22356 to 21826. [2020-10-09 13:48:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21826 states. [2020-10-09 13:48:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21826 states to 21826 states and 86349 transitions. [2020-10-09 13:48:35,408 INFO L78 Accepts]: Start accepts. Automaton has 21826 states and 86349 transitions. Word has length 16 [2020-10-09 13:48:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:48:35,408 INFO L481 AbstractCegarLoop]: Abstraction has 21826 states and 86349 transitions. [2020-10-09 13:48:35,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-09 13:48:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21826 states and 86349 transitions. [2020-10-09 13:48:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-09 13:48:35,415 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:48:35,415 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:48:35,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-09 13:48:35,629 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:48:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:48:35,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1012463302, now seen corresponding path program 1 times [2020-10-09 13:48:35,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:48:35,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045060963] [2020-10-09 13:48:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:48:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:35,642 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:48:35,650 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:48:35,657 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-09 13:48:35,658 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 13:48:35,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-09 13:48:35,658 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-09 13:48:35,659 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 13:48:35,659 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-09 13:48:35,677 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,677 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,677 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,677 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,677 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,677 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,678 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,678 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,678 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,678 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,678 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,678 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,679 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,679 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,679 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,679 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,679 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,679 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,679 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,679 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,680 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,680 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,680 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,680 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,680 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,680 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,680 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,681 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,681 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,681 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,681 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,681 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,681 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,681 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,682 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,682 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,682 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,682 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,683 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,683 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,683 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,683 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,683 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,684 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,684 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,684 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,684 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,685 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,686 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,686 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,686 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,686 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,687 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,687 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,687 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,688 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,688 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,689 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,689 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,689 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,689 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,689 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,692 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,693 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,693 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,694 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,694 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,697 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,698 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,698 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,698 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,698 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:48:35,706 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 13:48:35,707 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 13:48:35,707 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 13:48:35,707 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 13:48:35,707 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 13:48:35,707 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 13:48:35,707 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 13:48:35,707 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 13:48:35,708 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 13:48:35,710 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 13:48:35,710 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 106 transitions, 290 flow [2020-10-09 13:48:35,710 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 106 transitions, 290 flow [2020-10-09 13:48:35,710 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-10-09 13:48:35,989 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-10-09 13:48:35,990 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-09 13:48:36,004 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 2291 events. 399/2291 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 16164 event pairs, 72 based on Foata normal form. 0/1892 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2020-10-09 13:48:36,048 INFO L117 LiptonReduction]: Number of co-enabled transitions 3660 [2020-10-09 13:48:38,089 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-09 13:48:38,178 INFO L132 LiptonReduction]: Checked pairs total: 14446 [2020-10-09 13:48:38,178 INFO L134 LiptonReduction]: Total number of compositions: 76 [2020-10-09 13:48:38,179 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 43 transitions, 164 flow [2020-10-09 13:49:12,271 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 127122 states. [2020-10-09 13:49:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 127122 states. [2020-10-09 13:49:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-09 13:49:12,271 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:49:12,271 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-09 13:49:12,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:49:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:49:12,272 INFO L82 PathProgramCache]: Analyzing trace with hash 35155697, now seen corresponding path program 1 times [2020-10-09 13:49:12,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:49:12,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849942262] [2020-10-09 13:49:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:49:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:49:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 13:49:12,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849942262] [2020-10-09 13:49:12,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:49:12,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 13:49:12,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023430018] [2020-10-09 13:49:12,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 13:49:12,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:49:12,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 13:49:12,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 13:49:12,293 INFO L87 Difference]: Start difference. First operand 127122 states. Second operand 3 states. [2020-10-09 13:49:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:49:12,996 INFO L93 Difference]: Finished difference Result 127122 states and 615398 transitions. [2020-10-09 13:49:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-09 13:49:12,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-09 13:49:12,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:49:14,300 INFO L225 Difference]: With dead ends: 127122 [2020-10-09 13:49:14,300 INFO L226 Difference]: Without dead ends: 111496 [2020-10-09 13:49:14,300 INFO L673 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 [2020-10-09 13:49:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111496 states. [2020-10-09 13:49:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111496 to 111496. [2020-10-09 13:49:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111496 states. [2020-10-09 13:49:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111496 states to 111496 states and 543522 transitions. [2020-10-09 13:49:22,495 INFO L78 Accepts]: Start accepts. Automaton has 111496 states and 543522 transitions. Word has length 4 [2020-10-09 13:49:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:49:22,495 INFO L481 AbstractCegarLoop]: Abstraction has 111496 states and 543522 transitions. [2020-10-09 13:49:22,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-09 13:49:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 111496 states and 543522 transitions. [2020-10-09 13:49:22,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 13:49:22,496 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:49:22,496 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:49:22,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-09 13:49:22,496 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:49:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:49:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1170285684, now seen corresponding path program 1 times [2020-10-09 13:49:22,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:49:22,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643328241] [2020-10-09 13:49:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:49:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:49:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-09 13:49:22,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643328241] [2020-10-09 13:49:22,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 13:49:22,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 13:49:22,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527799080] [2020-10-09 13:49:22,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 13:49:22,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:49:22,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 13:49:22,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-09 13:49:22,527 INFO L87 Difference]: Start difference. First operand 111496 states and 543522 transitions. Second operand 4 states. [2020-10-09 13:49:28,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:49:28,595 INFO L93 Difference]: Finished difference Result 120747 states and 568406 transitions. [2020-10-09 13:49:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 13:49:28,596 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-09 13:49:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:49:29,019 INFO L225 Difference]: With dead ends: 120747 [2020-10-09 13:49:29,019 INFO L226 Difference]: Without dead ends: 120747 [2020-10-09 13:49:29,020 INFO L673 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 [2020-10-09 13:49:31,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120747 states. [2020-10-09 13:49:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120747 to 116197. [2020-10-09 13:49:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116197 states. [2020-10-09 13:49:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116197 states to 116197 states and 549860 transitions. [2020-10-09 13:49:33,702 INFO L78 Accepts]: Start accepts. Automaton has 116197 states and 549860 transitions. Word has length 8 [2020-10-09 13:49:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:49:33,702 INFO L481 AbstractCegarLoop]: Abstraction has 116197 states and 549860 transitions. [2020-10-09 13:49:33,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 13:49:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 116197 states and 549860 transitions. [2020-10-09 13:49:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-09 13:49:33,703 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:49:33,703 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:49:33,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-09 13:49:33,704 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:49:33,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:49:33,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1082449829, now seen corresponding path program 1 times [2020-10-09 13:49:33,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:49:33,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981892611] [2020-10-09 13:49:33,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:49:33,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:49:33,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:49:33,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981892611] [2020-10-09 13:49:33,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306352338] [2020-10-09 13:49:33,737 INFO L95 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 [2020-10-09 13:49:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:49:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-09 13:49:33,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:49:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:49:33,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:49:33,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-09 13:49:33,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098753769] [2020-10-09 13:49:33,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 13:49:33,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:49:33,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 13:49:33,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:49:33,841 INFO L87 Difference]: Start difference. First operand 116197 states and 549860 transitions. Second operand 6 states. [2020-10-09 13:49:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:49:34,497 INFO L93 Difference]: Finished difference Result 116193 states and 549849 transitions. [2020-10-09 13:49:34,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-09 13:49:34,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-09 13:49:34,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:49:34,861 INFO L225 Difference]: With dead ends: 116193 [2020-10-09 13:49:34,861 INFO L226 Difference]: Without dead ends: 116193 [2020-10-09 13:49:34,862 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-09 13:49:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116193 states. [2020-10-09 13:49:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116193 to 116193. [2020-10-09 13:49:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116193 states. [2020-10-09 13:49:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116193 states to 116193 states and 549849 transitions. [2020-10-09 13:49:45,558 INFO L78 Accepts]: Start accepts. Automaton has 116193 states and 549849 transitions. Word has length 16 [2020-10-09 13:49:45,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:49:45,558 INFO L481 AbstractCegarLoop]: Abstraction has 116193 states and 549849 transitions. [2020-10-09 13:49:45,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 13:49:45,558 INFO L276 IsEmpty]: Start isEmpty. Operand 116193 states and 549849 transitions. [2020-10-09 13:49:45,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-09 13:49:45,560 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:49:45,560 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:49:45,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:49:45,768 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:49:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:49:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash 173719339, now seen corresponding path program 1 times [2020-10-09 13:49:45,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:49:45,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689516074] [2020-10-09 13:49:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:49:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:49:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:49:45,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689516074] [2020-10-09 13:49:45,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133990595] [2020-10-09 13:49:45,829 INFO L95 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 [2020-10-09 13:49:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:49:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-09 13:49:45,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:49:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:49:45,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:49:45,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 13:49:45,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524062935] [2020-10-09 13:49:45,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-09 13:49:45,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:49:45,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-09 13:49:45,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-09 13:49:45,972 INFO L87 Difference]: Start difference. First operand 116193 states and 549849 transitions. Second operand 8 states. [2020-10-09 13:49:46,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:49:46,671 INFO L93 Difference]: Finished difference Result 116177 states and 549793 transitions. [2020-10-09 13:49:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 13:49:46,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-09 13:49:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:49:47,033 INFO L225 Difference]: With dead ends: 116177 [2020-10-09 13:49:47,033 INFO L226 Difference]: Without dead ends: 116177 [2020-10-09 13:49:47,033 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-09 13:49:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116177 states. [2020-10-09 13:49:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116177 to 116177. [2020-10-09 13:49:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116177 states. [2020-10-09 13:49:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116177 states to 116177 states and 549793 transitions. [2020-10-09 13:49:52,756 INFO L78 Accepts]: Start accepts. Automaton has 116177 states and 549793 transitions. Word has length 20 [2020-10-09 13:49:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:49:52,756 INFO L481 AbstractCegarLoop]: Abstraction has 116177 states and 549793 transitions. [2020-10-09 13:49:52,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-09 13:49:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 116177 states and 549793 transitions. [2020-10-09 13:49:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-09 13:49:52,762 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:49:52,762 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:49:52,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 13:49:52,975 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:49:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:49:52,976 INFO L82 PathProgramCache]: Analyzing trace with hash -999416206, now seen corresponding path program 1 times [2020-10-09 13:49:52,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:49:52,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424763330] [2020-10-09 13:49:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:49:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:49:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:49:53,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424763330] [2020-10-09 13:49:53,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096935973] [2020-10-09 13:49:53,021 INFO L95 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 [2020-10-09 13:49:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 13:49:53,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-09 13:49:53,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 13:49:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-09 13:49:53,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 13:49:53,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 13:49:53,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013209994] [2020-10-09 13:49:53,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 13:49:53,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 13:49:53,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 13:49:53,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-09 13:49:53,138 INFO L87 Difference]: Start difference. First operand 116177 states and 549793 transitions. Second operand 10 states. [2020-10-09 13:49:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 13:49:59,025 INFO L93 Difference]: Finished difference Result 116113 states and 549521 transitions. [2020-10-09 13:49:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 13:49:59,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-09 13:49:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 13:49:59,420 INFO L225 Difference]: With dead ends: 116113 [2020-10-09 13:49:59,420 INFO L226 Difference]: Without dead ends: 116113 [2020-10-09 13:49:59,420 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-09 13:50:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116113 states. [2020-10-09 13:50:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116113 to 116113. [2020-10-09 13:50:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116113 states. [2020-10-09 13:50:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116113 states to 116113 states and 549521 transitions. [2020-10-09 13:50:04,423 INFO L78 Accepts]: Start accepts. Automaton has 116113 states and 549521 transitions. Word has length 24 [2020-10-09 13:50:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 13:50:04,423 INFO L481 AbstractCegarLoop]: Abstraction has 116113 states and 549521 transitions. [2020-10-09 13:50:04,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 13:50:04,423 INFO L276 IsEmpty]: Start isEmpty. Operand 116113 states and 549521 transitions. [2020-10-09 13:50:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-09 13:50:04,439 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 13:50:04,439 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 13:50:04,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-09 13:50:04,655 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 13:50:04,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 13:50:04,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1963695170, now seen corresponding path program 1 times [2020-10-09 13:50:04,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 13:50:04,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965243610] [2020-10-09 13:50:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 13:50:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:50:04,670 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:50:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 13:50:04,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 13:50:04,698 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-09 13:50:04,698 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 13:50:04,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-09 13:50:04,699 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-09 13:50:04,700 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 13:50:04,700 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-09 13:50:04,711 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,711 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,711 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,711 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,712 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,712 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,712 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,712 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,712 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,712 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,712 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,713 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,713 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,713 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,713 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,713 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,713 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,713 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,714 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,714 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,714 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,715 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,715 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,715 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,716 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,716 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,716 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,716 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,716 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,717 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,718 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,718 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,718 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,718 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,718 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,718 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,719 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,719 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,719 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,719 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,719 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,720 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,720 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,720 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,721 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,721 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,721 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,721 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,722 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,723 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,723 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,723 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,723 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,723 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,724 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,724 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,724 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,725 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,725 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,726 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,726 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,726 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,726 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,727 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,728 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,728 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,728 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,728 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,728 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,729 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,729 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,729 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,729 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,730 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 13:50:04,735 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-09 13:50:04,735 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 13:50:04,735 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 13:50:04,735 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 13:50:04,735 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 13:50:04,736 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 13:50:04,736 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 13:50:04,736 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 13:50:04,736 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 13:50:04,737 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 13:50:04,737 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 113 transitions, 324 flow [2020-10-09 13:50:04,737 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 113 transitions, 324 flow [2020-10-09 13:50:04,737 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-10-09 13:50:05,341 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-10-09 13:50:05,341 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-09 13:50:05,371 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4546 events. 849/4546 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 38350 event pairs, 201 based on Foata normal form. 0/3761 useless extension candidates. Maximal degree in co-relation 2509. Up to 448 conditions per place. [2020-10-09 13:50:05,466 INFO L117 LiptonReduction]: Number of co-enabled transitions 4550 [2020-10-09 13:50:07,345 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-09 13:50:07,437 INFO L132 LiptonReduction]: Checked pairs total: 19547 [2020-10-09 13:50:07,438 INFO L134 LiptonReduction]: Total number of compositions: 80 [2020-10-09 13:50:07,438 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 48 transitions, 194 flow [2020-10-09 14:01:47,114 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 617870 states. [2020-10-09 14:01:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 617870 states. [2020-10-09 14:01:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-09 14:01:47,115 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 14:01:47,115 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-09 14:01:47,115 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:01:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:01:47,115 INFO L82 PathProgramCache]: Analyzing trace with hash 41370148, now seen corresponding path program 1 times [2020-10-09 14:01:47,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 14:01:47,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433235601] [2020-10-09 14:01:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 14:01:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:01:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:01:47,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433235601] [2020-10-09 14:01:47,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:01:47,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 14:01:47,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368806194] [2020-10-09 14:01:47,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-09 14:01:47,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 14:01:47,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-09 14:01:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-09 14:01:47,140 INFO L87 Difference]: Start difference. First operand 617870 states. Second operand 3 states.