/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 19:54:32,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 19:54:32,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 19:54:33,046 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 19:54:33,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 19:54:33,054 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 19:54:33,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 19:54:33,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 19:54:33,070 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 19:54:33,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 19:54:33,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 19:54:33,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 19:54:33,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 19:54:33,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 19:54:33,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 19:54:33,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 19:54:33,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 19:54:33,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 19:54:33,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 19:54:33,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 19:54:33,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 19:54:33,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 19:54:33,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 19:54:33,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 19:54:33,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 19:54:33,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 19:54:33,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 19:54:33,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 19:54:33,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 19:54:33,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 19:54:33,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 19:54:33,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 19:54:33,149 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 19:54:33,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 19:54:33,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 19:54:33,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 19:54:33,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 19:54:33,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 19:54:33,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 19:54:33,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 19:54:33,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 19:54:33,162 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-11 19:54:33,185 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 19:54:33,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 19:54:33,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 19:54:33,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 19:54:33,189 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 19:54:33,189 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 19:54:33,189 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 19:54:33,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 19:54:33,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 19:54:33,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 19:54:33,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 19:54:33,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 19:54:33,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 19:54:33,191 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 19:54:33,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 19:54:33,191 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 19:54:33,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 19:54:33,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 19:54:33,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 19:54:33,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 19:54:33,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 19:54:33,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 19:54:33,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 19:54:33,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 19:54:33,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 19:54:33,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 19:54:33,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 19:54:33,193 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-11 19:54:33,194 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-11 19:54:33,194 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 19:54:33,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 19:54:33,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 19:54:33,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 19:54:33,595 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 19:54:33,596 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 19:54:33,597 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-11 19:54:33,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da2662354/3c5d2ce4df6c4853979a00368a335e63/FLAGbf3ab3343 [2020-10-11 19:54:34,307 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 19:54:34,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-11 19:54:34,308 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-11 19:54:34,308 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-11 19:54:34,309 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-11 19:54:34,360 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da2662354/3c5d2ce4df6c4853979a00368a335e63/FLAGbf3ab3343 [2020-10-11 19:54:34,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da2662354/3c5d2ce4df6c4853979a00368a335e63 [2020-10-11 19:54:34,583 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 19:54:34,586 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 19:54:34,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 19:54:34,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 19:54:34,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 19:54:34,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:54:34" (1/1) ... [2020-10-11 19:54:34,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7beb2234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:34, skipping insertion in model container [2020-10-11 19:54:34,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:54:34" (1/1) ... [2020-10-11 19:54:34,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 19:54:34,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 19:54:34,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 19:54:34,862 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 19:54:34,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 19:54:35,003 INFO L208 MainTranslator]: Completed translation [2020-10-11 19:54:35,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35 WrapperNode [2020-10-11 19:54:35,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 19:54:35,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 19:54:35,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 19:54:35,007 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 19:54:35,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,058 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 19:54:35,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 19:54:35,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 19:54:35,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 19:54:35,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (1/1) ... [2020-10-11 19:54:35,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 19:54:35,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 19:54:35,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 19:54:35,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 19:54:35,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (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 [2020-10-11 19:54:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 19:54:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 19:54:35,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 19:54:35,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-11 19:54:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-11 19:54:35,183 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-11 19:54:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-11 19:54:35,183 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-11 19:54:35,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 19:54:35,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 19:54:35,185 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 19:54:35,497 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 19:54:35,498 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 19:54:35,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:54:35 BoogieIcfgContainer [2020-10-11 19:54:35,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 19:54:35,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 19:54:35,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 19:54:35,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 19:54:35,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:54:34" (1/3) ... [2020-10-11 19:54:35,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5e18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:54:35, skipping insertion in model container [2020-10-11 19:54:35,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:54:35" (2/3) ... [2020-10-11 19:54:35,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5e18a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:54:35, skipping insertion in model container [2020-10-11 19:54:35,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:54:35" (3/3) ... [2020-10-11 19:54:35,511 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-11 19:54:35,531 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 19:54:35,549 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 19:54:35,554 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 19:54:35,643 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,646 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,647 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,649 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,650 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,650 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,651 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,652 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,654 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,654 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,655 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,656 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,656 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,657 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,663 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,664 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,664 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,664 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,665 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,665 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,665 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,665 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,678 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,678 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,684 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,685 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,685 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,697 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,697 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,697 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,698 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,698 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 19:54:35,736 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 19:54:35,759 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 19:54:35,760 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-11 19:54:35,760 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 19:54:35,760 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 19:54:35,760 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 19:54:35,760 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 19:54:35,760 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 19:54:35,761 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 19:54:35,779 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-11 19:54:35,835 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-11 19:54:35,835 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-11 19:54:35,843 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 56 events. 5/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-11 19:54:35,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 56 transitions, 134 flow [2020-10-11 19:54:35,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 110 flow [2020-10-11 19:54:35,877 INFO L129 PetriNetUnfolder]: 5/47 cut-off events. [2020-10-11 19:54:35,877 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-11 19:54:35,878 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:35,880 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:35,880 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:35,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:35,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2003973694, now seen corresponding path program 1 times [2020-10-11 19:54:35,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:35,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178921582] [2020-10-11 19:54:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:54:36,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178921582] [2020-10-11 19:54:36,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:54:36,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 19:54:36,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832705321] [2020-10-11 19:54:36,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-11 19:54:36,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-11 19:54:36,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-11 19:54:36,164 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 56 [2020-10-11 19:54:36,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 110 flow. Second operand 2 states. [2020-10-11 19:54:36,167 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:36,167 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 56 [2020-10-11 19:54:36,170 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:36,218 INFO L129 PetriNetUnfolder]: 3/46 cut-off events. [2020-10-11 19:54:36,221 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-11 19:54:36,223 INFO L80 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 46 events. 3/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 2/46 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2020-10-11 19:54:36,226 INFO L132 encePairwiseOnDemand]: 54/56 looper letters, 0 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2020-10-11 19:54:36,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 106 flow [2020-10-11 19:54:36,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-11 19:54:36,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-10-11 19:54:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 110 transitions. [2020-10-11 19:54:36,256 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9821428571428571 [2020-10-11 19:54:36,258 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 110 transitions. [2020-10-11 19:54:36,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 110 transitions. [2020-10-11 19:54:36,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:36,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 110 transitions. [2020-10-11 19:54:36,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 3 states. [2020-10-11 19:54:36,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 3 states. [2020-10-11 19:54:36,290 INFO L81 ComplementDD]: Finished complementDD. Result 3 states. [2020-10-11 19:54:36,293 INFO L185 Difference]: Start difference. First operand has 47 places, 46 transitions, 110 flow. Second operand 2 states and 110 transitions. [2020-10-11 19:54:36,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 106 flow [2020-10-11 19:54:36,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-11 19:54:36,317 INFO L241 Difference]: Finished difference. Result has 44 places, 44 transitions, 94 flow [2020-10-11 19:54:36,321 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2020-10-11 19:54:36,323 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, -3 predicate places. [2020-10-11 19:54:36,323 INFO L481 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 94 flow [2020-10-11 19:54:36,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-11 19:54:36,324 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:36,326 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:36,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 19:54:36,328 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash -649740476, now seen corresponding path program 1 times [2020-10-11 19:54:36,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:36,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096131142] [2020-10-11 19:54:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:36,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:54:36,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096131142] [2020-10-11 19:54:36,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:54:36,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 19:54:36,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746394825] [2020-10-11 19:54:36,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 19:54:36,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:36,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 19:54:36,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 19:54:36,559 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 56 [2020-10-11 19:54:36,560 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 94 flow. Second operand 3 states. [2020-10-11 19:54:36,560 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:36,560 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 56 [2020-10-11 19:54:36,560 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:36,585 INFO L129 PetriNetUnfolder]: 3/51 cut-off events. [2020-10-11 19:54:36,586 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 19:54:36,587 INFO L80 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 51 events. 3/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 58. Up to 5 conditions per place. [2020-10-11 19:54:36,588 INFO L132 encePairwiseOnDemand]: 53/56 looper letters, 3 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2020-10-11 19:54:36,589 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 45 transitions, 106 flow [2020-10-11 19:54:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 19:54:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 19:54:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2020-10-11 19:54:36,593 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2020-10-11 19:54:36,594 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 156 transitions. [2020-10-11 19:54:36,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 156 transitions. [2020-10-11 19:54:36,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:36,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 156 transitions. [2020-10-11 19:54:36,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 19:54:36,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 19:54:36,599 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 19:54:36,600 INFO L185 Difference]: Start difference. First operand has 44 places, 44 transitions, 94 flow. Second operand 3 states and 156 transitions. [2020-10-11 19:54:36,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 45 transitions, 106 flow [2020-10-11 19:54:36,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 106 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-11 19:54:36,605 INFO L241 Difference]: Finished difference. Result has 47 places, 45 transitions, 106 flow [2020-10-11 19:54:36,605 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2020-10-11 19:54:36,607 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2020-10-11 19:54:36,607 INFO L481 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 106 flow [2020-10-11 19:54:36,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 19:54:36,607 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:36,608 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:36,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 19:54:36,608 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2099276824, now seen corresponding path program 1 times [2020-10-11 19:54:36,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:36,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175795900] [2020-10-11 19:54:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:54:36,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175795900] [2020-10-11 19:54:36,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 19:54:36,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 19:54:36,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924000996] [2020-10-11 19:54:36,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-11 19:54:36,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:36,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-11 19:54:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-11 19:54:36,724 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 56 [2020-10-11 19:54:36,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states. [2020-10-11 19:54:36,725 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:36,725 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 56 [2020-10-11 19:54:36,725 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:36,748 INFO L129 PetriNetUnfolder]: 3/56 cut-off events. [2020-10-11 19:54:36,748 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-11 19:54:36,749 INFO L80 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 56 events. 3/56 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 0 based on Foata normal form. 1/57 useless extension candidates. Maximal degree in co-relation 68. Up to 5 conditions per place. [2020-10-11 19:54:36,749 INFO L132 encePairwiseOnDemand]: 53/56 looper letters, 3 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2020-10-11 19:54:36,750 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 118 flow [2020-10-11 19:54:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-11 19:54:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-11 19:54:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2020-10-11 19:54:36,753 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.9285714285714286 [2020-10-11 19:54:36,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 156 transitions. [2020-10-11 19:54:36,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 156 transitions. [2020-10-11 19:54:36,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:36,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 156 transitions. [2020-10-11 19:54:36,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-11 19:54:36,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-11 19:54:36,757 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-11 19:54:36,757 INFO L185 Difference]: Start difference. First operand has 47 places, 45 transitions, 106 flow. Second operand 3 states and 156 transitions. [2020-10-11 19:54:36,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 118 flow [2020-10-11 19:54:36,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 19:54:36,761 INFO L241 Difference]: Finished difference. Result has 49 places, 46 transitions, 116 flow [2020-10-11 19:54:36,762 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2020-10-11 19:54:36,763 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2020-10-11 19:54:36,763 INFO L481 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 116 flow [2020-10-11 19:54:36,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-11 19:54:36,763 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:36,764 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:36,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 19:54:36,765 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1537010890, now seen corresponding path program 1 times [2020-10-11 19:54:36,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:36,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942303234] [2020-10-11 19:54:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:54:36,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942303234] [2020-10-11 19:54:36,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624504910] [2020-10-11 19:54:36,870 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 [2020-10-11 19:54:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 19:54:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:54:37,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:54:37,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-10-11 19:54:37,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229306171] [2020-10-11 19:54:37,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 19:54:37,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:37,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 19:54:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-11 19:54:37,155 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 56 [2020-10-11 19:54:37,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 116 flow. Second operand 7 states. [2020-10-11 19:54:37,157 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:37,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 56 [2020-10-11 19:54:37,158 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:37,257 INFO L129 PetriNetUnfolder]: 3/62 cut-off events. [2020-10-11 19:54:37,258 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-11 19:54:37,259 INFO L80 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 62 events. 3/62 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 0 based on Foata normal form. 1/63 useless extension candidates. Maximal degree in co-relation 85. Up to 7 conditions per place. [2020-10-11 19:54:37,259 INFO L132 encePairwiseOnDemand]: 51/56 looper letters, 6 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2020-10-11 19:54:37,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 148 flow [2020-10-11 19:54:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-11 19:54:37,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-11 19:54:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 300 transitions. [2020-10-11 19:54:37,263 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2020-10-11 19:54:37,263 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 300 transitions. [2020-10-11 19:54:37,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 300 transitions. [2020-10-11 19:54:37,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:37,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 300 transitions. [2020-10-11 19:54:37,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-11 19:54:37,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-11 19:54:37,268 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-11 19:54:37,268 INFO L185 Difference]: Start difference. First operand has 49 places, 46 transitions, 116 flow. Second operand 6 states and 300 transitions. [2020-10-11 19:54:37,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 148 flow [2020-10-11 19:54:37,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 146 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-11 19:54:37,272 INFO L241 Difference]: Finished difference. Result has 56 places, 49 transitions, 146 flow [2020-10-11 19:54:37,273 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2020-10-11 19:54:37,273 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2020-10-11 19:54:37,273 INFO L481 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 146 flow [2020-10-11 19:54:37,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 19:54:37,274 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:37,274 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:37,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:37,490 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:37,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1566150408, now seen corresponding path program 1 times [2020-10-11 19:54:37,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:37,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985808318] [2020-10-11 19:54:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-11 19:54:37,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985808318] [2020-10-11 19:54:37,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557757542] [2020-10-11 19:54:37,558 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 [2020-10-11 19:54:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 19:54:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:54:37,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:54:37,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2020-10-11 19:54:37,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519873183] [2020-10-11 19:54:37,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 19:54:37,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 19:54:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 19:54:38,113 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-11 19:54:38,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 146 flow. Second operand 10 states. [2020-10-11 19:54:38,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:38,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-11 19:54:38,116 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:39,014 INFO L129 PetriNetUnfolder]: 145/477 cut-off events. [2020-10-11 19:54:39,015 INFO L130 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2020-10-11 19:54:39,020 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1094 conditions, 477 events. 145/477 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2264 event pairs, 20 based on Foata normal form. 24/499 useless extension candidates. Maximal degree in co-relation 1085. Up to 62 conditions per place. [2020-10-11 19:54:39,027 INFO L132 encePairwiseOnDemand]: 46/56 looper letters, 74 selfloop transitions, 80 changer transitions 0/186 dead transitions. [2020-10-11 19:54:39,027 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 186 transitions, 993 flow [2020-10-11 19:54:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 19:54:39,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-11 19:54:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1889 transitions. [2020-10-11 19:54:39,036 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8227351916376306 [2020-10-11 19:54:39,037 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 1889 transitions. [2020-10-11 19:54:39,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 1889 transitions. [2020-10-11 19:54:39,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:39,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 1889 transitions. [2020-10-11 19:54:39,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 42 states. [2020-10-11 19:54:39,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 42 states. [2020-10-11 19:54:39,053 INFO L81 ComplementDD]: Finished complementDD. Result 42 states. [2020-10-11 19:54:39,054 INFO L185 Difference]: Start difference. First operand has 56 places, 49 transitions, 146 flow. Second operand 41 states and 1889 transitions. [2020-10-11 19:54:39,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 186 transitions, 993 flow [2020-10-11 19:54:39,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 186 transitions, 963 flow, removed 5 selfloop flow, removed 2 redundant places. [2020-10-11 19:54:39,065 INFO L241 Difference]: Finished difference. Result has 124 places, 122 transitions, 818 flow [2020-10-11 19:54:39,066 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=818, PETRI_PLACES=124, PETRI_TRANSITIONS=122} [2020-10-11 19:54:39,067 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 77 predicate places. [2020-10-11 19:54:39,067 INFO L481 AbstractCegarLoop]: Abstraction has has 124 places, 122 transitions, 818 flow [2020-10-11 19:54:39,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 19:54:39,068 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:39,068 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:39,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:39,282 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:39,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1313073002, now seen corresponding path program 2 times [2020-10-11 19:54:39,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:39,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30144956] [2020-10-11 19:54:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-11 19:54:39,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30144956] [2020-10-11 19:54:39,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110835659] [2020-10-11 19:54:39,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-11 19:54:39,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-11 19:54:39,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:54:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-11 19:54:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:39,563 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-10-11 19:54:39,565 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 19:54:39,572 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-11 19:54:39,573 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-11 19:54:39,573 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-10-11 19:54:39,611 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-11 19:54:39,613 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-11 19:54:39,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-11 19:54:39,620 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-11 19:54:39,621 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-10-11 19:54:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-11 19:54:39,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:54:39,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-11 19:54:39,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398761484] [2020-10-11 19:54:39,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 19:54:39,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:39,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 19:54:39,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-11 19:54:39,999 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 56 [2020-10-11 19:54:40,000 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 122 transitions, 818 flow. Second operand 8 states. [2020-10-11 19:54:40,001 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:40,001 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 56 [2020-10-11 19:54:40,001 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:40,159 INFO L129 PetriNetUnfolder]: 73/322 cut-off events. [2020-10-11 19:54:40,160 INFO L130 PetriNetUnfolder]: For 2059/2079 co-relation queries the response was YES. [2020-10-11 19:54:40,167 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1212 conditions, 322 events. 73/322 cut-off events. For 2059/2079 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1413 event pairs, 18 based on Foata normal form. 10/320 useless extension candidates. Maximal degree in co-relation 1173. Up to 37 conditions per place. [2020-10-11 19:54:40,171 INFO L132 encePairwiseOnDemand]: 51/56 looper letters, 3 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2020-10-11 19:54:40,172 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 121 transitions, 829 flow [2020-10-11 19:54:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 19:54:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-11 19:54:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2020-10-11 19:54:40,180 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8321428571428572 [2020-10-11 19:54:40,181 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 233 transitions. [2020-10-11 19:54:40,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 233 transitions. [2020-10-11 19:54:40,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:40,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 233 transitions. [2020-10-11 19:54:40,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-11 19:54:40,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-11 19:54:40,184 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-11 19:54:40,184 INFO L185 Difference]: Start difference. First operand has 124 places, 122 transitions, 818 flow. Second operand 5 states and 233 transitions. [2020-10-11 19:54:40,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 121 transitions, 829 flow [2020-10-11 19:54:40,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 121 transitions, 717 flow, removed 28 selfloop flow, removed 5 redundant places. [2020-10-11 19:54:40,222 INFO L241 Difference]: Finished difference. Result has 123 places, 121 transitions, 711 flow [2020-10-11 19:54:40,223 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=711, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2020-10-11 19:54:40,223 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 76 predicate places. [2020-10-11 19:54:40,223 INFO L481 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 711 flow [2020-10-11 19:54:40,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 19:54:40,224 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:40,224 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:40,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:40,436 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:40,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1455358556, now seen corresponding path program 2 times [2020-10-11 19:54:40,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:40,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839441929] [2020-10-11 19:54:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-11 19:54:40,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839441929] [2020-10-11 19:54:40,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039801195] [2020-10-11 19:54:40,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-11 19:54:40,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:54:40,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:54:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-11 19:54:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:40,632 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-11 19:54:40,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:54:40,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-11 19:54:40,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715026929] [2020-10-11 19:54:40,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 19:54:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:40,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 19:54:40,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-11 19:54:40,735 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 56 [2020-10-11 19:54:40,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 711 flow. Second operand 9 states. [2020-10-11 19:54:40,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:40,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 56 [2020-10-11 19:54:40,737 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:40,952 INFO L129 PetriNetUnfolder]: 91/379 cut-off events. [2020-10-11 19:54:40,953 INFO L130 PetriNetUnfolder]: For 3716/3784 co-relation queries the response was YES. [2020-10-11 19:54:40,960 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 379 events. 91/379 cut-off events. For 3716/3784 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1709 event pairs, 33 based on Foata normal form. 38/402 useless extension candidates. Maximal degree in co-relation 1554. Up to 50 conditions per place. [2020-10-11 19:54:40,966 INFO L132 encePairwiseOnDemand]: 51/56 looper letters, 6 selfloop transitions, 43 changer transitions 0/125 dead transitions. [2020-10-11 19:54:40,967 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 125 transitions, 883 flow [2020-10-11 19:54:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 19:54:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-11 19:54:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 447 transitions. [2020-10-11 19:54:40,971 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8869047619047619 [2020-10-11 19:54:40,972 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 447 transitions. [2020-10-11 19:54:40,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 447 transitions. [2020-10-11 19:54:40,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:40,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 447 transitions. [2020-10-11 19:54:40,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-11 19:54:40,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-11 19:54:40,978 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-11 19:54:40,978 INFO L185 Difference]: Start difference. First operand has 123 places, 121 transitions, 711 flow. Second operand 9 states and 447 transitions. [2020-10-11 19:54:40,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 125 transitions, 883 flow [2020-10-11 19:54:41,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 125 transitions, 875 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-11 19:54:41,012 INFO L241 Difference]: Finished difference. Result has 130 places, 124 transitions, 873 flow [2020-10-11 19:54:41,013 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=873, PETRI_PLACES=130, PETRI_TRANSITIONS=124} [2020-10-11 19:54:41,013 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 83 predicate places. [2020-10-11 19:54:41,014 INFO L481 AbstractCegarLoop]: Abstraction has has 130 places, 124 transitions, 873 flow [2020-10-11 19:54:41,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 19:54:41,014 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:41,014 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:41,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:41,231 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:41,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1991061258, now seen corresponding path program 3 times [2020-10-11 19:54:41,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:41,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801579854] [2020-10-11 19:54:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-11 19:54:41,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801579854] [2020-10-11 19:54:41,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435989495] [2020-10-11 19:54:41,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-11 19:54:41,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 19:54:41,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:54:41,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 19:54:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-11 19:54:41,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:54:41,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 19:54:41,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807815578] [2020-10-11 19:54:41,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 19:54:41,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:41,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 19:54:41,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 19:54:41,875 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 56 [2020-10-11 19:54:41,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 124 transitions, 873 flow. Second operand 11 states. [2020-10-11 19:54:41,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:41,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 56 [2020-10-11 19:54:41,877 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:42,120 INFO L129 PetriNetUnfolder]: 109/443 cut-off events. [2020-10-11 19:54:42,121 INFO L130 PetriNetUnfolder]: For 5979/6122 co-relation queries the response was YES. [2020-10-11 19:54:42,126 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2104 conditions, 443 events. 109/443 cut-off events. For 5979/6122 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2063 event pairs, 48 based on Foata normal form. 52/478 useless extension candidates. Maximal degree in co-relation 2061. Up to 63 conditions per place. [2020-10-11 19:54:42,132 INFO L132 encePairwiseOnDemand]: 51/56 looper letters, 6 selfloop transitions, 46 changer transitions 0/128 dead transitions. [2020-10-11 19:54:42,132 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 128 transitions, 1059 flow [2020-10-11 19:54:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 19:54:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 19:54:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 594 transitions. [2020-10-11 19:54:42,135 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8839285714285714 [2020-10-11 19:54:42,135 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 594 transitions. [2020-10-11 19:54:42,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 594 transitions. [2020-10-11 19:54:42,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:42,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 594 transitions. [2020-10-11 19:54:42,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 19:54:42,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 19:54:42,140 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 19:54:42,140 INFO L185 Difference]: Start difference. First operand has 130 places, 124 transitions, 873 flow. Second operand 12 states and 594 transitions. [2020-10-11 19:54:42,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 128 transitions, 1059 flow [2020-10-11 19:54:42,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 128 transitions, 970 flow, removed 16 selfloop flow, removed 4 redundant places. [2020-10-11 19:54:42,167 INFO L241 Difference]: Finished difference. Result has 140 places, 127 transitions, 952 flow [2020-10-11 19:54:42,168 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=952, PETRI_PLACES=140, PETRI_TRANSITIONS=127} [2020-10-11 19:54:42,169 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 93 predicate places. [2020-10-11 19:54:42,169 INFO L481 AbstractCegarLoop]: Abstraction has has 140 places, 127 transitions, 952 flow [2020-10-11 19:54:42,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 19:54:42,169 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:42,169 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:42,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:42,385 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:42,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1230124188, now seen corresponding path program 4 times [2020-10-11 19:54:42,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:42,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212538702] [2020-10-11 19:54:42,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-11 19:54:42,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212538702] [2020-10-11 19:54:42,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909643711] [2020-10-11 19:54:42,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:42,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 19:54:42,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:54:42,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 19:54:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-11 19:54:42,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:54:42,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-11 19:54:42,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806142694] [2020-10-11 19:54:42,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 19:54:42,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 19:54:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-11 19:54:42,853 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 56 [2020-10-11 19:54:42,854 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 127 transitions, 952 flow. Second operand 11 states. [2020-10-11 19:54:42,854 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:42,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 56 [2020-10-11 19:54:42,854 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:43,074 INFO L129 PetriNetUnfolder]: 131/514 cut-off events. [2020-10-11 19:54:43,075 INFO L130 PetriNetUnfolder]: For 7312/7773 co-relation queries the response was YES. [2020-10-11 19:54:43,083 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 514 events. 131/514 cut-off events. For 7312/7773 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2517 event pairs, 71 based on Foata normal form. 220/711 useless extension candidates. Maximal degree in co-relation 2402. Up to 78 conditions per place. [2020-10-11 19:54:43,090 INFO L132 encePairwiseOnDemand]: 51/56 looper letters, 6 selfloop transitions, 43 changer transitions 0/131 dead transitions. [2020-10-11 19:54:43,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 131 transitions, 1108 flow [2020-10-11 19:54:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 19:54:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-11 19:54:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 594 transitions. [2020-10-11 19:54:43,094 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8839285714285714 [2020-10-11 19:54:43,094 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 594 transitions. [2020-10-11 19:54:43,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 594 transitions. [2020-10-11 19:54:43,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:43,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 594 transitions. [2020-10-11 19:54:43,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-11 19:54:43,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-11 19:54:43,099 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-11 19:54:43,099 INFO L185 Difference]: Start difference. First operand has 140 places, 127 transitions, 952 flow. Second operand 12 states and 594 transitions. [2020-10-11 19:54:43,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 131 transitions, 1108 flow [2020-10-11 19:54:43,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 131 transitions, 984 flow, removed 19 selfloop flow, removed 8 redundant places. [2020-10-11 19:54:43,120 INFO L241 Difference]: Finished difference. Result has 146 places, 130 transitions, 980 flow [2020-10-11 19:54:43,121 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=980, PETRI_PLACES=146, PETRI_TRANSITIONS=130} [2020-10-11 19:54:43,122 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 99 predicate places. [2020-10-11 19:54:43,122 INFO L481 AbstractCegarLoop]: Abstraction has has 146 places, 130 transitions, 980 flow [2020-10-11 19:54:43,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 19:54:43,122 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:43,123 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:43,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:43,338 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash 904077462, now seen corresponding path program 5 times [2020-10-11 19:54:43,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:43,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77961901] [2020-10-11 19:54:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:54:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77961901] [2020-10-11 19:54:43,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310706476] [2020-10-11 19:54:43,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:43,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 19:54:43,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:54:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 19:54:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-11 19:54:43,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:54:43,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-11 19:54:43,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669466973] [2020-10-11 19:54:43,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 19:54:43,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:43,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 19:54:43,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-11 19:54:43,687 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 56 [2020-10-11 19:54:43,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 130 transitions, 980 flow. Second operand 13 states. [2020-10-11 19:54:43,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:43,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 56 [2020-10-11 19:54:43,690 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:44,048 INFO L129 PetriNetUnfolder]: 155/620 cut-off events. [2020-10-11 19:54:44,049 INFO L130 PetriNetUnfolder]: For 9846/10637 co-relation queries the response was YES. [2020-10-11 19:54:44,060 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 620 events. 155/620 cut-off events. For 9846/10637 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3151 event pairs, 90 based on Foata normal form. 290/887 useless extension candidates. Maximal degree in co-relation 2948. Up to 98 conditions per place. [2020-10-11 19:54:44,069 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 9 selfloop transitions, 47 changer transitions 0/137 dead transitions. [2020-10-11 19:54:44,069 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 137 transitions, 1134 flow [2020-10-11 19:54:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 19:54:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-11 19:54:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 730 transitions. [2020-10-11 19:54:44,074 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8690476190476191 [2020-10-11 19:54:44,074 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 730 transitions. [2020-10-11 19:54:44,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 730 transitions. [2020-10-11 19:54:44,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:44,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 730 transitions. [2020-10-11 19:54:44,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-11 19:54:44,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-11 19:54:44,085 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-11 19:54:44,085 INFO L185 Difference]: Start difference. First operand has 146 places, 130 transitions, 980 flow. Second operand 15 states and 730 transitions. [2020-10-11 19:54:44,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 137 transitions, 1134 flow [2020-10-11 19:54:44,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 137 transitions, 1048 flow, removed 10 selfloop flow, removed 7 redundant places. [2020-10-11 19:54:44,130 INFO L241 Difference]: Finished difference. Result has 157 places, 133 transitions, 1044 flow [2020-10-11 19:54:44,132 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1044, PETRI_PLACES=157, PETRI_TRANSITIONS=133} [2020-10-11 19:54:44,132 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 110 predicate places. [2020-10-11 19:54:44,132 INFO L481 AbstractCegarLoop]: Abstraction has has 157 places, 133 transitions, 1044 flow [2020-10-11 19:54:44,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 19:54:44,133 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:44,133 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:44,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 19:54:44,342 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1494134998, now seen corresponding path program 6 times [2020-10-11 19:54:44,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:44,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659541592] [2020-10-11 19:54:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 59 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-11 19:54:44,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659541592] [2020-10-11 19:54:44,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453822134] [2020-10-11 19:54:44,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:44,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 19:54:44,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:54:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 19:54:44,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:54:44,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-11 19:54:44,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [11] total 30 [2020-10-11 19:54:44,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882096219] [2020-10-11 19:54:44,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 19:54:44,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:44,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 19:54:44,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-11 19:54:45,137 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-11 19:54:45,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 133 transitions, 1044 flow. Second operand 21 states. [2020-10-11 19:54:45,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:45,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-11 19:54:45,138 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:48,947 INFO L129 PetriNetUnfolder]: 2773/9088 cut-off events. [2020-10-11 19:54:48,947 INFO L130 PetriNetUnfolder]: For 118342/119163 co-relation queries the response was YES. [2020-10-11 19:54:49,199 INFO L80 FinitePrefix]: Finished finitePrefix Result has 44570 conditions, 9088 events. 2773/9088 cut-off events. For 118342/119163 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 91279 event pairs, 1353 based on Foata normal form. 635/9442 useless extension candidates. Maximal degree in co-relation 44518. Up to 1466 conditions per place. [2020-10-11 19:54:49,283 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 34 selfloop transitions, 17 changer transitions 55/228 dead transitions. [2020-10-11 19:54:49,283 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 228 transitions, 1448 flow [2020-10-11 19:54:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 19:54:49,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-11 19:54:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1212 transitions. [2020-10-11 19:54:49,288 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8324175824175825 [2020-10-11 19:54:49,289 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1212 transitions. [2020-10-11 19:54:49,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1212 transitions. [2020-10-11 19:54:49,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:54:49,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1212 transitions. [2020-10-11 19:54:49,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-11 19:54:49,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-11 19:54:49,299 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-11 19:54:49,300 INFO L185 Difference]: Start difference. First operand has 157 places, 133 transitions, 1044 flow. Second operand 26 states and 1212 transitions. [2020-10-11 19:54:49,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 228 transitions, 1448 flow [2020-10-11 19:54:50,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 228 transitions, 1342 flow, removed 13 selfloop flow, removed 10 redundant places. [2020-10-11 19:54:50,032 INFO L241 Difference]: Finished difference. Result has 190 places, 154 transitions, 1105 flow [2020-10-11 19:54:50,033 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1105, PETRI_PLACES=190, PETRI_TRANSITIONS=154} [2020-10-11 19:54:50,033 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 143 predicate places. [2020-10-11 19:54:50,033 INFO L481 AbstractCegarLoop]: Abstraction has has 190 places, 154 transitions, 1105 flow [2020-10-11 19:54:50,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 19:54:50,033 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:54:50,034 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:54:50,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-11 19:54:50,235 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:54:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:54:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash 578200566, now seen corresponding path program 7 times [2020-10-11 19:54:50,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:54:50,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652021408] [2020-10-11 19:54:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:54:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 44 proven. 42 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-11 19:54:50,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652021408] [2020-10-11 19:54:50,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117913178] [2020-10-11 19:54:50,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:54:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:54:50,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 19:54:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:54:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-11 19:54:50,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:54:50,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-10-11 19:54:50,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432027041] [2020-10-11 19:54:50,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 19:54:50,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:54:50,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 19:54:50,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-11 19:54:51,748 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 56 [2020-10-11 19:54:51,749 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 154 transitions, 1105 flow. Second operand 22 states. [2020-10-11 19:54:51,749 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:54:51,749 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 56 [2020-10-11 19:54:51,749 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:54:52,301 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-10-11 19:55:02,537 INFO L129 PetriNetUnfolder]: 3812/10651 cut-off events. [2020-10-11 19:55:02,537 INFO L130 PetriNetUnfolder]: For 162875/164333 co-relation queries the response was YES. [2020-10-11 19:55:02,806 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60170 conditions, 10651 events. 3812/10651 cut-off events. For 162875/164333 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 99244 event pairs, 1106 based on Foata normal form. 1339/11833 useless extension candidates. Maximal degree in co-relation 60099. Up to 1400 conditions per place. [2020-10-11 19:55:02,915 INFO L132 encePairwiseOnDemand]: 45/56 looper letters, 341 selfloop transitions, 946 changer transitions 25/1388 dead transitions. [2020-10-11 19:55:02,915 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1388 transitions, 13853 flow [2020-10-11 19:55:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2020-10-11 19:55:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-11 19:55:02,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 8938 transitions. [2020-10-11 19:55:02,936 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.742358803986711 [2020-10-11 19:55:02,937 INFO L72 ComplementDD]: Start complementDD. Operand 215 states and 8938 transitions. [2020-10-11 19:55:02,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 215 states and 8938 transitions. [2020-10-11 19:55:02,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:55:02,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 215 states and 8938 transitions. [2020-10-11 19:55:02,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 216 states. [2020-10-11 19:55:02,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 216 states. [2020-10-11 19:55:02,976 INFO L81 ComplementDD]: Finished complementDD. Result 216 states. [2020-10-11 19:55:02,976 INFO L185 Difference]: Start difference. First operand has 190 places, 154 transitions, 1105 flow. Second operand 215 states and 8938 transitions. [2020-10-11 19:55:02,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1388 transitions, 13853 flow [2020-10-11 19:55:03,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1388 transitions, 12259 flow, removed 797 selfloop flow, removed 12 redundant places. [2020-10-11 19:55:03,530 INFO L241 Difference]: Finished difference. Result has 437 places, 1165 transitions, 10923 flow [2020-10-11 19:55:03,531 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=215, PETRI_FLOW=10923, PETRI_PLACES=437, PETRI_TRANSITIONS=1165} [2020-10-11 19:55:03,532 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 390 predicate places. [2020-10-11 19:55:03,532 INFO L481 AbstractCegarLoop]: Abstraction has has 437 places, 1165 transitions, 10923 flow [2020-10-11 19:55:03,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 19:55:03,532 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:55:03,532 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:55:03,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:03,739 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:55:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:55:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash -884330540, now seen corresponding path program 8 times [2020-10-11 19:55:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:55:03,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031674490] [2020-10-11 19:55:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:55:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:55:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-11 19:55:03,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031674490] [2020-10-11 19:55:03,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695814488] [2020-10-11 19:55:03,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:03,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 19:55:03,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:55:03,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 19:55:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:55:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 66 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-11 19:55:04,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:55:04,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-10-11 19:55:04,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036883826] [2020-10-11 19:55:04,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 19:55:04,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:55:04,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 19:55:04,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 19:55:04,550 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-11 19:55:04,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1165 transitions, 10923 flow. Second operand 17 states. [2020-10-11 19:55:04,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:55:04,552 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-11 19:55:04,552 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:55:15,224 INFO L129 PetriNetUnfolder]: 6178/18680 cut-off events. [2020-10-11 19:55:15,225 INFO L130 PetriNetUnfolder]: For 669834/671479 co-relation queries the response was YES. [2020-10-11 19:55:15,965 INFO L80 FinitePrefix]: Finished finitePrefix Result has 131541 conditions, 18680 events. 6178/18680 cut-off events. For 669834/671479 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 204627 event pairs, 2453 based on Foata normal form. 1248/19587 useless extension candidates. Maximal degree in co-relation 131422. Up to 2835 conditions per place. [2020-10-11 19:55:16,049 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 170 selfloop transitions, 276 changer transitions 1096/1805 dead transitions. [2020-10-11 19:55:16,049 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1805 transitions, 18815 flow [2020-10-11 19:55:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 19:55:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-11 19:55:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 882 transitions. [2020-10-11 19:55:16,053 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8289473684210527 [2020-10-11 19:55:16,053 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 882 transitions. [2020-10-11 19:55:16,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 882 transitions. [2020-10-11 19:55:16,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:55:16,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 882 transitions. [2020-10-11 19:55:16,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-11 19:55:16,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-11 19:55:16,059 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-11 19:55:16,059 INFO L185 Difference]: Start difference. First operand has 437 places, 1165 transitions, 10923 flow. Second operand 19 states and 882 transitions. [2020-10-11 19:55:16,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1805 transitions, 18815 flow [2020-10-11 19:55:25,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 1805 transitions, 15995 flow, removed 1267 selfloop flow, removed 10 redundant places. [2020-10-11 19:55:25,445 INFO L241 Difference]: Finished difference. Result has 454 places, 691 transitions, 6412 flow [2020-10-11 19:55:25,446 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=8839, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6412, PETRI_PLACES=454, PETRI_TRANSITIONS=691} [2020-10-11 19:55:25,447 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 407 predicate places. [2020-10-11 19:55:25,447 INFO L481 AbstractCegarLoop]: Abstraction has has 454 places, 691 transitions, 6412 flow [2020-10-11 19:55:25,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 19:55:25,447 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:55:25,447 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:55:25,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:25,648 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:55:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:55:25,649 INFO L82 PathProgramCache]: Analyzing trace with hash 956457094, now seen corresponding path program 9 times [2020-10-11 19:55:25,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:55:25,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311166648] [2020-10-11 19:55:25,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:55:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:55:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 56 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-11 19:55:25,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311166648] [2020-10-11 19:55:25,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897916681] [2020-10-11 19:55:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:25,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 19:55:25,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:55:25,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 19:55:25,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:55:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 50 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-11 19:55:25,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:55:25,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-11 19:55:25,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144981534] [2020-10-11 19:55:25,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 19:55:25,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:55:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 19:55:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-11 19:55:26,323 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-11 19:55:26,324 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 691 transitions, 6412 flow. Second operand 15 states. [2020-10-11 19:55:26,324 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:55:26,324 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-11 19:55:26,324 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:55:29,605 INFO L129 PetriNetUnfolder]: 3799/12348 cut-off events. [2020-10-11 19:55:29,605 INFO L130 PetriNetUnfolder]: For 427164/428123 co-relation queries the response was YES. [2020-10-11 19:55:29,864 INFO L80 FinitePrefix]: Finished finitePrefix Result has 83280 conditions, 12348 events. 3799/12348 cut-off events. For 427164/428123 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 128759 event pairs, 1683 based on Foata normal form. 633/12704 useless extension candidates. Maximal degree in co-relation 83152. Up to 1772 conditions per place. [2020-10-11 19:55:29,889 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 78 selfloop transitions, 146 changer transitions 521/963 dead transitions. [2020-10-11 19:55:29,889 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 963 transitions, 10932 flow [2020-10-11 19:55:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 19:55:29,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-11 19:55:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 923 transitions. [2020-10-11 19:55:29,891 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8241071428571428 [2020-10-11 19:55:29,891 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 923 transitions. [2020-10-11 19:55:29,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 923 transitions. [2020-10-11 19:55:29,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:55:29,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 923 transitions. [2020-10-11 19:55:29,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-11 19:55:29,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-11 19:55:29,895 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-11 19:55:29,895 INFO L185 Difference]: Start difference. First operand has 454 places, 691 transitions, 6412 flow. Second operand 20 states and 923 transitions. [2020-10-11 19:55:29,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 963 transitions, 10932 flow [2020-10-11 19:55:32,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 963 transitions, 8518 flow, removed 926 selfloop flow, removed 29 redundant places. [2020-10-11 19:55:32,266 INFO L241 Difference]: Finished difference. Result has 376 places, 433 transitions, 3870 flow [2020-10-11 19:55:32,267 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=5388, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3870, PETRI_PLACES=376, PETRI_TRANSITIONS=433} [2020-10-11 19:55:32,267 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 329 predicate places. [2020-10-11 19:55:32,267 INFO L481 AbstractCegarLoop]: Abstraction has has 376 places, 433 transitions, 3870 flow [2020-10-11 19:55:32,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 19:55:32,268 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:55:32,268 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:55:32,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-11 19:55:32,469 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:55:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:55:32,469 INFO L82 PathProgramCache]: Analyzing trace with hash 2023760550, now seen corresponding path program 10 times [2020-10-11 19:55:32,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:55:32,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742315030] [2020-10-11 19:55:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:55:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:55:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 56 proven. 53 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-11 19:55:32,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742315030] [2020-10-11 19:55:32,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762468248] [2020-10-11 19:55:32,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:32,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 19:55:32,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:55:32,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 19:55:32,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:55:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 76 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-11 19:55:32,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:55:32,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-11 19:55:32,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032089612] [2020-10-11 19:55:32,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 19:55:32,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:55:32,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 19:55:32,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-11 19:55:33,044 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 56 [2020-10-11 19:55:33,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 433 transitions, 3870 flow. Second operand 15 states. [2020-10-11 19:55:33,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:55:33,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 56 [2020-10-11 19:55:33,046 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:55:34,118 INFO L129 PetriNetUnfolder]: 1276/4802 cut-off events. [2020-10-11 19:55:34,118 INFO L130 PetriNetUnfolder]: For 120811/121120 co-relation queries the response was YES. [2020-10-11 19:55:34,179 INFO L80 FinitePrefix]: Finished finitePrefix Result has 28881 conditions, 4802 events. 1276/4802 cut-off events. For 120811/121120 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 43248 event pairs, 445 based on Foata normal form. 214/4913 useless extension candidates. Maximal degree in co-relation 28769. Up to 622 conditions per place. [2020-10-11 19:55:34,197 INFO L132 encePairwiseOnDemand]: 51/56 looper letters, 41 selfloop transitions, 105 changer transitions 61/538 dead transitions. [2020-10-11 19:55:34,197 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 538 transitions, 5165 flow [2020-10-11 19:55:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 19:55:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-11 19:55:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 858 transitions. [2020-10-11 19:55:34,199 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8511904761904762 [2020-10-11 19:55:34,199 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 858 transitions. [2020-10-11 19:55:34,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 858 transitions. [2020-10-11 19:55:34,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:55:34,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 858 transitions. [2020-10-11 19:55:34,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 19 states. [2020-10-11 19:55:34,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 19 states. [2020-10-11 19:55:34,203 INFO L81 ComplementDD]: Finished complementDD. Result 19 states. [2020-10-11 19:55:34,203 INFO L185 Difference]: Start difference. First operand has 376 places, 433 transitions, 3870 flow. Second operand 18 states and 858 transitions. [2020-10-11 19:55:34,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 538 transitions, 5165 flow [2020-10-11 19:55:34,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 538 transitions, 4091 flow, removed 162 selfloop flow, removed 23 redundant places. [2020-10-11 19:55:34,850 INFO L241 Difference]: Finished difference. Result has 336 places, 476 transitions, 3566 flow [2020-10-11 19:55:34,851 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3566, PETRI_PLACES=336, PETRI_TRANSITIONS=476} [2020-10-11 19:55:34,851 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 289 predicate places. [2020-10-11 19:55:34,851 INFO L481 AbstractCegarLoop]: Abstraction has has 336 places, 476 transitions, 3566 flow [2020-10-11 19:55:34,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 19:55:34,851 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:55:34,851 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:55:35,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 19:55:35,058 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:55:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:55:35,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1861454586, now seen corresponding path program 11 times [2020-10-11 19:55:35,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:55:35,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628561088] [2020-10-11 19:55:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:55:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:55:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 88 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:55:35,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628561088] [2020-10-11 19:55:35,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558046677] [2020-10-11 19:55:35,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:35,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 19:55:35,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:55:35,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 19:55:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:55:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 109 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:55:35,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:55:35,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-10-11 19:55:35,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681156454] [2020-10-11 19:55:35,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 19:55:35,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:55:35,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 19:55:35,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-11 19:55:35,642 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-11 19:55:35,643 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 476 transitions, 3566 flow. Second operand 23 states. [2020-10-11 19:55:35,644 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:55:35,644 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-11 19:55:35,644 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:55:39,225 INFO L129 PetriNetUnfolder]: 4415/14163 cut-off events. [2020-10-11 19:55:39,225 INFO L130 PetriNetUnfolder]: For 341772/342731 co-relation queries the response was YES. [2020-10-11 19:55:39,497 INFO L80 FinitePrefix]: Finished finitePrefix Result has 81281 conditions, 14163 events. 4415/14163 cut-off events. For 341772/342731 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 154037 event pairs, 2149 based on Foata normal form. 670/14481 useless extension candidates. Maximal degree in co-relation 81183. Up to 2232 conditions per place. [2020-10-11 19:55:39,565 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 173 selfloop transitions, 339 changer transitions 99/829 dead transitions. [2020-10-11 19:55:39,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 829 transitions, 6573 flow [2020-10-11 19:55:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 19:55:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 19:55:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1731 transitions. [2020-10-11 19:55:39,568 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8134398496240601 [2020-10-11 19:55:39,568 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 1731 transitions. [2020-10-11 19:55:39,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 1731 transitions. [2020-10-11 19:55:39,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:55:39,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 1731 transitions. [2020-10-11 19:55:39,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 39 states. [2020-10-11 19:55:39,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 39 states. [2020-10-11 19:55:39,574 INFO L81 ComplementDD]: Finished complementDD. Result 39 states. [2020-10-11 19:55:39,574 INFO L185 Difference]: Start difference. First operand has 336 places, 476 transitions, 3566 flow. Second operand 38 states and 1731 transitions. [2020-10-11 19:55:39,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 829 transitions, 6573 flow [2020-10-11 19:55:41,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 829 transitions, 6312 flow, removed 98 selfloop flow, removed 18 redundant places. [2020-10-11 19:55:41,780 INFO L241 Difference]: Finished difference. Result has 367 places, 661 transitions, 5220 flow [2020-10-11 19:55:41,780 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5220, PETRI_PLACES=367, PETRI_TRANSITIONS=661} [2020-10-11 19:55:41,781 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 320 predicate places. [2020-10-11 19:55:41,781 INFO L481 AbstractCegarLoop]: Abstraction has has 367 places, 661 transitions, 5220 flow [2020-10-11 19:55:41,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 19:55:41,781 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:55:41,781 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:55:41,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 19:55:41,983 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:55:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:55:41,984 INFO L82 PathProgramCache]: Analyzing trace with hash -660442150, now seen corresponding path program 12 times [2020-10-11 19:55:41,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:55:41,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300729792] [2020-10-11 19:55:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:55:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:55:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 84 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:55:42,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300729792] [2020-10-11 19:55:42,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906206441] [2020-10-11 19:55:42,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:42,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 19:55:42,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 19:55:42,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 19:55:42,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:55:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 107 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 19:55:42,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:55:42,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-10-11 19:55:42,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199045038] [2020-10-11 19:55:42,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 19:55:42,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:55:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 19:55:42,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-11 19:55:42,654 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-11 19:55:42,656 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 661 transitions, 5220 flow. Second operand 19 states. [2020-10-11 19:55:42,656 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:55:42,656 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-11 19:55:42,656 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:55:47,944 INFO L129 PetriNetUnfolder]: 7548/24172 cut-off events. [2020-10-11 19:55:47,944 INFO L130 PetriNetUnfolder]: For 436210/438025 co-relation queries the response was YES. [2020-10-11 19:55:48,412 INFO L80 FinitePrefix]: Finished finitePrefix Result has 139684 conditions, 24172 events. 7548/24172 cut-off events. For 436210/438025 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 293009 event pairs, 4003 based on Foata normal form. 1193/24768 useless extension candidates. Maximal degree in co-relation 139591. Up to 4170 conditions per place. [2020-10-11 19:55:48,459 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 148 selfloop transitions, 284 changer transitions 361/1011 dead transitions. [2020-10-11 19:55:48,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1011 transitions, 9202 flow [2020-10-11 19:55:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 19:55:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-11 19:55:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1273 transitions. [2020-10-11 19:55:48,461 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8118622448979592 [2020-10-11 19:55:48,461 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1273 transitions. [2020-10-11 19:55:48,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1273 transitions. [2020-10-11 19:55:48,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:55:48,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1273 transitions. [2020-10-11 19:55:48,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 29 states. [2020-10-11 19:55:48,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 29 states. [2020-10-11 19:55:48,472 INFO L81 ComplementDD]: Finished complementDD. Result 29 states. [2020-10-11 19:55:48,472 INFO L185 Difference]: Start difference. First operand has 367 places, 661 transitions, 5220 flow. Second operand 28 states and 1273 transitions. [2020-10-11 19:55:48,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1011 transitions, 9202 flow [2020-10-11 19:55:51,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1011 transitions, 8806 flow, removed 140 selfloop flow, removed 14 redundant places. [2020-10-11 19:55:51,263 INFO L241 Difference]: Finished difference. Result has 382 places, 621 transitions, 5365 flow [2020-10-11 19:55:51,263 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=4962, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5365, PETRI_PLACES=382, PETRI_TRANSITIONS=621} [2020-10-11 19:55:51,264 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 335 predicate places. [2020-10-11 19:55:51,264 INFO L481 AbstractCegarLoop]: Abstraction has has 382 places, 621 transitions, 5365 flow [2020-10-11 19:55:51,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 19:55:51,264 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-11 19:55:51,264 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 19:55:51,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:51,465 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-11 19:55:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 19:55:51,466 INFO L82 PathProgramCache]: Analyzing trace with hash -987179610, now seen corresponding path program 13 times [2020-10-11 19:55:51,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 19:55:51,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822259388] [2020-10-11 19:55:51,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 19:55:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:55:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 68 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:55:51,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822259388] [2020-10-11 19:55:51,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209098833] [2020-10-11 19:55:51,605 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 19:55:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 19:55:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 19:55:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 19:55:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-11 19:55:52,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 19:55:52,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-10-11 19:55:52,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005017729] [2020-10-11 19:55:52,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 19:55:52,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 19:55:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 19:55:52,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 19:55:52,457 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 56 [2020-10-11 19:55:52,457 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 621 transitions, 5365 flow. Second operand 17 states. [2020-10-11 19:55:52,457 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-11 19:55:52,457 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 56 [2020-10-11 19:55:52,458 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-11 19:55:59,150 INFO L129 PetriNetUnfolder]: 5808/19925 cut-off events. [2020-10-11 19:55:59,150 INFO L130 PetriNetUnfolder]: For 375774/377421 co-relation queries the response was YES. [2020-10-11 19:55:59,481 INFO L80 FinitePrefix]: Finished finitePrefix Result has 117761 conditions, 19925 events. 5808/19925 cut-off events. For 375774/377421 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 239406 event pairs, 3190 based on Foata normal form. 1170/20649 useless extension candidates. Maximal degree in co-relation 117664. Up to 3434 conditions per place. [2020-10-11 19:55:59,498 INFO L132 encePairwiseOnDemand]: 50/56 looper letters, 0 selfloop transitions, 0 changer transitions 893/893 dead transitions. [2020-10-11 19:55:59,498 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 893 transitions, 8961 flow [2020-10-11 19:55:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 19:55:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-11 19:55:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1047 transitions. [2020-10-11 19:55:59,500 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.812888198757764 [2020-10-11 19:55:59,500 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1047 transitions. [2020-10-11 19:55:59,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1047 transitions. [2020-10-11 19:55:59,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-11 19:55:59,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1047 transitions. [2020-10-11 19:55:59,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-11 19:55:59,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-11 19:55:59,504 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-11 19:55:59,504 INFO L185 Difference]: Start difference. First operand has 382 places, 621 transitions, 5365 flow. Second operand 23 states and 1047 transitions. [2020-10-11 19:55:59,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 893 transitions, 8961 flow [2020-10-11 19:56:01,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 893 transitions, 7623 flow, removed 116 selfloop flow, removed 30 redundant places. [2020-10-11 19:56:01,857 INFO L241 Difference]: Finished difference. Result has 356 places, 0 transitions, 0 flow [2020-10-11 19:56:01,857 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=0, PETRI_PLACES=356, PETRI_TRANSITIONS=0} [2020-10-11 19:56:01,857 INFO L341 CegarLoopForPetriNet]: 47 programPoint places, 309 predicate places. [2020-10-11 19:56:01,857 INFO L481 AbstractCegarLoop]: Abstraction has has 356 places, 0 transitions, 0 flow [2020-10-11 19:56:01,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 19:56:02,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 19:56:02,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 07:56:02 BasicIcfg [2020-10-11 19:56:02,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 19:56:02,067 INFO L168 Benchmark]: Toolchain (without parser) took 87482.18 ms. Allocated memory was 246.4 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 201.5 MB in the beginning and 1.6 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.7 GB. Max. memory is 14.2 GB. [2020-10-11 19:56:02,067 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 246.4 MB. Free memory is still 222.8 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 19:56:02,068 INFO L168 Benchmark]: CACSL2BoogieTranslator took 418.30 ms. Allocated memory was 246.4 MB in the beginning and 303.6 MB in the end (delta: 57.1 MB). Free memory was 201.5 MB in the beginning and 278.7 MB in the end (delta: -77.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 14.2 GB. [2020-10-11 19:56:02,068 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.17 ms. Allocated memory is still 303.6 MB. Free memory is still 278.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 19:56:02,069 INFO L168 Benchmark]: Boogie Preprocessor took 33.80 ms. Allocated memory is still 303.6 MB. Free memory was 278.7 MB in the beginning and 276.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 19:56:02,069 INFO L168 Benchmark]: RCFGBuilder took 408.51 ms. Allocated memory is still 303.6 MB. Free memory was 276.2 MB in the beginning and 257.3 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 14.2 GB. [2020-10-11 19:56:02,070 INFO L168 Benchmark]: TraceAbstraction took 86561.68 ms. Allocated memory was 303.6 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 257.3 MB in the beginning and 1.6 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.7 GB. Max. memory is 14.2 GB. [2020-10-11 19:56:02,072 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 246.4 MB. Free memory is still 222.8 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 418.30 ms. Allocated memory was 246.4 MB in the beginning and 303.6 MB in the end (delta: 57.1 MB). Free memory was 201.5 MB in the beginning and 278.7 MB in the end (delta: -77.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 52.17 ms. Allocated memory is still 303.6 MB. Free memory is still 278.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 33.80 ms. Allocated memory is still 303.6 MB. Free memory was 278.7 MB in the beginning and 276.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 408.51 ms. Allocated memory is still 303.6 MB. Free memory was 276.2 MB in the beginning and 257.3 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 86561.68 ms. Allocated memory was 303.6 MB in the beginning and 2.8 GB in the end (delta: 2.5 GB). Free memory was 257.3 MB in the beginning and 1.6 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.7 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 86.3s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 77.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 359 SDtfs, 813 SDslu, 1634 SDs, 0 SdLazy, 4129 SolverSat, 506 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1857 GetRequests, 1259 SyntacticMatches, 0 SemanticMatches, 598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24320 ImplicationChecksByTransitivity, 9.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10923occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 2364 NumberOfCodeBlocks, 2303 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 2331 ConstructedInterpolants, 0 QuantifiedInterpolants, 476224 SizeOfPredicates, 145 NumberOfNonLiveVariables, 1915 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 33 InterpolantComputations, 4 PerfectInterpolantSequences, 1658/2485 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...