/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 16:03:03,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 16:03:03,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 16:03:03,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 16:03:03,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 16:03:03,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 16:03:03,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 16:03:03,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 16:03:03,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 16:03:03,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 16:03:03,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 16:03:03,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 16:03:03,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 16:03:03,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 16:03:03,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 16:03:03,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 16:03:03,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 16:03:03,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 16:03:03,999 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 16:03:04,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 16:03:04,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 16:03:04,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 16:03:04,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 16:03:04,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 16:03:04,011 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 16:03:04,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 16:03:04,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 16:03:04,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 16:03:04,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 16:03:04,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 16:03:04,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 16:03:04,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 16:03:04,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 16:03:04,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 16:03:04,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 16:03:04,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 16:03:04,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 16:03:04,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 16:03:04,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 16:03:04,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 16:03:04,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 16:03:04,024 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-11 16:03:04,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 16:03:04,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 16:03:04,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 16:03:04,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 16:03:04,056 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 16:03:04,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 16:03:04,057 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 16:03:04,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 16:03:04,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 16:03:04,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 16:03:04,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 16:03:04,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 16:03:04,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 16:03:04,059 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 16:03:04,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 16:03:04,060 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 16:03:04,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 16:03:04,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 16:03:04,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 16:03:04,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 16:03:04,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 16:03:04,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:03:04,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 16:03:04,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 16:03:04,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 16:03:04,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 16:03:04,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 16:03:04,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 16:03:04,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 16:03:04,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 16:03:04,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 16:03:04,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 16:03:04,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 16:03:04,566 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 16:03:04,567 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 16:03:04,570 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-11 16:03:04,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2eb22db8/407f0a9965b74196bdceca0144f8649b/FLAG4a4a24f0e [2020-09-11 16:03:05,432 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 16:03:05,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-11 16:03:05,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2eb22db8/407f0a9965b74196bdceca0144f8649b/FLAG4a4a24f0e [2020-09-11 16:03:05,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d2eb22db8/407f0a9965b74196bdceca0144f8649b [2020-09-11 16:03:05,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 16:03:05,617 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 16:03:05,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 16:03:05,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 16:03:05,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 16:03:05,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:03:05" (1/1) ... [2020-09-11 16:03:05,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ceedc44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:05, skipping insertion in model container [2020-09-11 16:03:05,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 04:03:05" (1/1) ... [2020-09-11 16:03:05,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 16:03:05,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 16:03:06,546 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:03:06,573 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 16:03:06,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 16:03:06,852 INFO L208 MainTranslator]: Completed translation [2020-09-11 16:03:06,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06 WrapperNode [2020-09-11 16:03:06,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 16:03:06,856 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 16:03:06,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 16:03:06,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 16:03:06,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,907 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 16:03:06,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 16:03:06,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 16:03:06,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 16:03:06,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... [2020-09-11 16:03:06,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 16:03:06,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 16:03:06,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 16:03:06,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 16:03:06,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 16:03:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 16:03:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 16:03:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-11 16:03:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-09-11 16:03:07,056 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-09-11 16:03:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 16:03:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 16:03:07,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 16:03:07,059 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 16:03:07,507 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 16:03:07,507 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-11 16:03:07,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:03:07 BoogieIcfgContainer [2020-09-11 16:03:07,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 16:03:07,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 16:03:07,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 16:03:07,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 16:03:07,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 04:03:05" (1/3) ... [2020-09-11 16:03:07,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e0419a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:03:07, skipping insertion in model container [2020-09-11 16:03:07,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 04:03:06" (2/3) ... [2020-09-11 16:03:07,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e0419a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 04:03:07, skipping insertion in model container [2020-09-11 16:03:07,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 04:03:07" (3/3) ... [2020-09-11 16:03:07,524 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-09-11 16:03:07,536 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 16:03:07,536 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 16:03:07,546 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 16:03:07,548 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 16:03:07,577 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,578 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,578 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,578 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,578 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,579 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,579 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,579 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,580 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,580 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,580 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,580 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,581 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,581 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,581 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,581 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,582 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,582 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,582 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,582 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,582 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,587 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,587 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,588 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,588 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,588 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,588 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,589 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,589 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 16:03:07,619 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-11 16:03:07,643 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 16:03:07,643 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 16:03:07,643 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 16:03:07,644 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 16:03:07,644 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 16:03:07,644 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 16:03:07,644 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 16:03:07,644 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 16:03:07,662 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-09-11 16:03:07,665 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-11 16:03:07,721 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-11 16:03:07,721 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-11 16:03:07,727 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-11 16:03:07,730 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-11 16:03:07,758 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-11 16:03:07,758 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-11 16:03:07,759 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-09-11 16:03:07,760 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2020-09-11 16:03:07,762 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 16:03:09,227 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-11 16:03:09,436 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-11 16:03:10,056 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-09-11 16:03:10,393 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-11 16:03:10,969 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-09-11 16:03:11,433 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-09-11 16:03:12,956 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-09-11 16:03:13,652 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-09-11 16:03:13,657 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2020-09-11 16:03:13,657 INFO L214 etLargeBlockEncoding]: Total number of compositions: 78 [2020-09-11 16:03:13,663 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-09-11 16:03:13,675 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-09-11 16:03:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-09-11 16:03:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 16:03:13,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:13,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:13,689 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:13,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:13,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-09-11 16:03:13,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:13,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004450676] [2020-09-11 16:03:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:13,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004450676] [2020-09-11 16:03:13,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 16:03:13,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 16:03:13,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013360925] [2020-09-11 16:03:13,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 16:03:13,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:14,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 16:03:14,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 16:03:14,010 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-09-11 16:03:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:14,061 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-09-11 16:03:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 16:03:14,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-11 16:03:14,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:14,088 INFO L225 Difference]: With dead ends: 20 [2020-09-11 16:03:14,089 INFO L226 Difference]: Without dead ends: 20 [2020-09-11 16:03:14,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 16:03:14,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-11 16:03:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-11 16:03:14,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-11 16:03:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-09-11 16:03:14,149 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-09-11 16:03:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:14,150 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-09-11 16:03:14,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 16:03:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-09-11 16:03:14,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 16:03:14,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:14,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:14,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 16:03:14,151 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-09-11 16:03:14,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:14,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018628064] [2020-09-11 16:03:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:14,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018628064] [2020-09-11 16:03:14,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495033718] [2020-09-11 16:03:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:14,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-11 16:03:14,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-11 16:03:14,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-11 16:03:14,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-09-11 16:03:14,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832537747] [2020-09-11 16:03:14,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 16:03:14,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:14,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 16:03:14,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:03:14,401 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-09-11 16:03:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:14,414 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-09-11 16:03:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 16:03:14,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-09-11 16:03:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:14,416 INFO L225 Difference]: With dead ends: 28 [2020-09-11 16:03:14,416 INFO L226 Difference]: Without dead ends: 28 [2020-09-11 16:03:14,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 16:03:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-11 16:03:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-09-11 16:03:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-11 16:03:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-09-11 16:03:14,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-09-11 16:03:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:14,424 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-09-11 16:03:14,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 16:03:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-09-11 16:03:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 16:03:14,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:14,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:14,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-11 16:03:14,637 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-09-11 16:03:14,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:14,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806077521] [2020-09-11 16:03:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:03:14,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806077521] [2020-09-11 16:03:14,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567267753] [2020-09-11 16:03:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:14,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-11 16:03:14,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-11 16:03:14,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:14,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-11 16:03:14,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983747769] [2020-09-11 16:03:14,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:03:14,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:03:14,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:03:14,881 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-09-11 16:03:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:15,031 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-09-11 16:03:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:03:15,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-11 16:03:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:15,034 INFO L225 Difference]: With dead ends: 44 [2020-09-11 16:03:15,034 INFO L226 Difference]: Without dead ends: 44 [2020-09-11 16:03:15,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-11 16:03:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-11 16:03:15,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-09-11 16:03:15,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-11 16:03:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-09-11 16:03:15,041 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-09-11 16:03:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:15,042 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-09-11 16:03:15,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:03:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-09-11 16:03:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 16:03:15,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:15,043 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:15,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:15,259 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:15,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-09-11 16:03:15,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:15,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102437043] [2020-09-11 16:03:15,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-11 16:03:15,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102437043] [2020-09-11 16:03:15,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100395947] [2020-09-11 16:03:15,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:15,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:15,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-11 16:03:15,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-11 16:03:15,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:15,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 16:03:15,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151104737] [2020-09-11 16:03:15,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 16:03:15,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:15,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 16:03:15,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:03:15,485 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-09-11 16:03:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:15,521 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-09-11 16:03:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 16:03:15,523 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-11 16:03:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:15,527 INFO L225 Difference]: With dead ends: 54 [2020-09-11 16:03:15,527 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 16:03:15,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-11 16:03:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 16:03:15,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-09-11 16:03:15,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 16:03:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-09-11 16:03:15,540 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-09-11 16:03:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:15,540 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-09-11 16:03:15,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 16:03:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-09-11 16:03:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 16:03:15,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:15,544 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:15,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:15,757 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:15,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:15,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-09-11 16:03:15,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:15,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084591974] [2020-09-11 16:03:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-11 16:03:15,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084591974] [2020-09-11 16:03:15,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972528964] [2020-09-11 16:03:15,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:16,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 16:03:16,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-11 16:03:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-11 16:03:16,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:16,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-09-11 16:03:16,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681342874] [2020-09-11 16:03:16,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 16:03:16,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 16:03:16,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-11 16:03:16,045 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-09-11 16:03:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:16,366 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-09-11 16:03:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 16:03:16,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-09-11 16:03:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:16,369 INFO L225 Difference]: With dead ends: 76 [2020-09-11 16:03:16,370 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 16:03:16,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:03:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 16:03:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-09-11 16:03:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 16:03:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-09-11 16:03:16,383 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-09-11 16:03:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:16,384 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-09-11 16:03:16,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 16:03:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-09-11 16:03:16,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 16:03:16,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:16,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:16,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:16,594 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:16,594 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-09-11 16:03:16,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:16,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560732392] [2020-09-11 16:03:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 16:03:16,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560732392] [2020-09-11 16:03:16,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88906080] [2020-09-11 16:03:16,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:16,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:03:16,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:16,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-11 16:03:16,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-11 16:03:16,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:16,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-09-11 16:03:16,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904275564] [2020-09-11 16:03:16,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:03:16,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:16,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:03:16,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:03:16,849 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 11 states. [2020-09-11 16:03:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:17,391 INFO L93 Difference]: Finished difference Result 102 states and 200 transitions. [2020-09-11 16:03:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 16:03:17,392 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-09-11 16:03:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:17,393 INFO L225 Difference]: With dead ends: 102 [2020-09-11 16:03:17,394 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 16:03:17,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-09-11 16:03:17,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 16:03:17,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-09-11 16:03:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-11 16:03:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 186 transitions. [2020-09-11 16:03:17,405 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 186 transitions. Word has length 19 [2020-09-11 16:03:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:17,406 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 186 transitions. [2020-09-11 16:03:17,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:03:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 186 transitions. [2020-09-11 16:03:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 16:03:17,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:17,407 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:17,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 16:03:17,621 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1553067533, now seen corresponding path program 5 times [2020-09-11 16:03:17,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:17,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858695160] [2020-09-11 16:03:17,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-11 16:03:17,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858695160] [2020-09-11 16:03:17,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444383967] [2020-09-11 16:03:17,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:17,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 16:03:17,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:17,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-11 16:03:17,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-11 16:03:17,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:17,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-09-11 16:03:17,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364169701] [2020-09-11 16:03:17,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 16:03:17,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:17,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 16:03:17,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 16:03:17,911 INFO L87 Difference]: Start difference. First operand 95 states and 186 transitions. Second operand 13 states. [2020-09-11 16:03:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:18,674 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2020-09-11 16:03:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-11 16:03:18,675 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-09-11 16:03:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:18,676 INFO L225 Difference]: With dead ends: 132 [2020-09-11 16:03:18,676 INFO L226 Difference]: Without dead ends: 132 [2020-09-11 16:03:18,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=588, Invalid=1218, Unknown=0, NotChecked=0, Total=1806 [2020-09-11 16:03:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-11 16:03:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-11 16:03:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 16:03:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 244 transitions. [2020-09-11 16:03:18,694 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 244 transitions. Word has length 22 [2020-09-11 16:03:18,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:18,694 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 244 transitions. [2020-09-11 16:03:18,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 16:03:18,694 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 244 transitions. [2020-09-11 16:03:18,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 16:03:18,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:18,696 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:18,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:18,901 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:18,902 INFO L82 PathProgramCache]: Analyzing trace with hash 390743231, now seen corresponding path program 6 times [2020-09-11 16:03:18,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:18,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024877168] [2020-09-11 16:03:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-11 16:03:19,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024877168] [2020-09-11 16:03:19,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780650637] [2020-09-11 16:03:19,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:19,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 16:03:19,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:19,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 16:03:19,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-11 16:03:19,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:19,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-09-11 16:03:19,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728065249] [2020-09-11 16:03:19,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 16:03:19,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 16:03:19,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 16:03:19,287 INFO L87 Difference]: Start difference. First operand 124 states and 244 transitions. Second operand 15 states. [2020-09-11 16:03:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:20,526 INFO L93 Difference]: Finished difference Result 166 states and 328 transitions. [2020-09-11 16:03:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-11 16:03:20,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-09-11 16:03:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:20,528 INFO L225 Difference]: With dead ends: 166 [2020-09-11 16:03:20,528 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 16:03:20,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1008, Invalid=2184, Unknown=0, NotChecked=0, Total=3192 [2020-09-11 16:03:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 16:03:20,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2020-09-11 16:03:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 16:03:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 310 transitions. [2020-09-11 16:03:20,541 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 310 transitions. Word has length 25 [2020-09-11 16:03:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:20,542 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 310 transitions. [2020-09-11 16:03:20,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 16:03:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 310 transitions. [2020-09-11 16:03:20,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 16:03:20,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:20,544 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:20,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:20,759 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:20,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:20,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1155941881, now seen corresponding path program 7 times [2020-09-11 16:03:20,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:20,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070631855] [2020-09-11 16:03:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 16:03:20,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070631855] [2020-09-11 16:03:20,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102796948] [2020-09-11 16:03:20,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:21,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 16:03:21,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 16:03:21,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:21,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 16:03:21,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443158451] [2020-09-11 16:03:21,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 16:03:21,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:21,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 16:03:21,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:03:21,059 INFO L87 Difference]: Start difference. First operand 157 states and 310 transitions. Second operand 11 states. [2020-09-11 16:03:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:21,106 INFO L93 Difference]: Finished difference Result 184 states and 364 transitions. [2020-09-11 16:03:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 16:03:21,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-11 16:03:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:21,109 INFO L225 Difference]: With dead ends: 184 [2020-09-11 16:03:21,109 INFO L226 Difference]: Without dead ends: 184 [2020-09-11 16:03:21,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-11 16:03:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-11 16:03:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2020-09-11 16:03:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-11 16:03:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 346 transitions. [2020-09-11 16:03:21,120 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 346 transitions. Word has length 28 [2020-09-11 16:03:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:21,120 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 346 transitions. [2020-09-11 16:03:21,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 16:03:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 346 transitions. [2020-09-11 16:03:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 16:03:21,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:21,123 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:21,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-11 16:03:21,338 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:21,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:21,339 INFO L82 PathProgramCache]: Analyzing trace with hash -768099092, now seen corresponding path program 8 times [2020-09-11 16:03:21,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:21,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726952203] [2020-09-11 16:03:21,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 16:03:21,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726952203] [2020-09-11 16:03:21,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91724651] [2020-09-11 16:03:21,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:21,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:21,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:03:21,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 16:03:21,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:21,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 16:03:21,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577300881] [2020-09-11 16:03:21,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 16:03:21,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:21,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 16:03:21,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:03:21,645 INFO L87 Difference]: Start difference. First operand 175 states and 346 transitions. Second operand 12 states. [2020-09-11 16:03:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:21,688 INFO L93 Difference]: Finished difference Result 202 states and 400 transitions. [2020-09-11 16:03:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 16:03:21,689 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-11 16:03:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:21,690 INFO L225 Difference]: With dead ends: 202 [2020-09-11 16:03:21,690 INFO L226 Difference]: Without dead ends: 202 [2020-09-11 16:03:21,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-11 16:03:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-11 16:03:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 193. [2020-09-11 16:03:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-11 16:03:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 382 transitions. [2020-09-11 16:03:21,699 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 382 transitions. Word has length 30 [2020-09-11 16:03:21,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:21,699 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 382 transitions. [2020-09-11 16:03:21,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 16:03:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 382 transitions. [2020-09-11 16:03:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-11 16:03:21,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:21,701 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:21,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:21,917 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:21,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1359430431, now seen corresponding path program 9 times [2020-09-11 16:03:21,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:21,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534651394] [2020-09-11 16:03:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 16:03:22,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534651394] [2020-09-11 16:03:22,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960515550] [2020-09-11 16:03:22,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:22,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 16:03:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:22,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 16:03:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-11 16:03:22,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:22,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-09-11 16:03:22,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214336353] [2020-09-11 16:03:22,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 16:03:22,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:22,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 16:03:22,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-11 16:03:22,286 INFO L87 Difference]: Start difference. First operand 193 states and 382 transitions. Second operand 19 states. [2020-09-11 16:03:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:24,737 INFO L93 Difference]: Finished difference Result 244 states and 484 transitions. [2020-09-11 16:03:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-11 16:03:24,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-09-11 16:03:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:24,740 INFO L225 Difference]: With dead ends: 244 [2020-09-11 16:03:24,740 INFO L226 Difference]: Without dead ends: 244 [2020-09-11 16:03:24,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2020-09-11 16:03:24,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-11 16:03:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2020-09-11 16:03:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-11 16:03:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 464 transitions. [2020-09-11 16:03:24,754 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 464 transitions. Word has length 32 [2020-09-11 16:03:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:24,754 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 464 transitions. [2020-09-11 16:03:24,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 16:03:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 464 transitions. [2020-09-11 16:03:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-11 16:03:24,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:24,758 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:24,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:24,973 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:24,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:24,973 INFO L82 PathProgramCache]: Analyzing trace with hash -377330477, now seen corresponding path program 10 times [2020-09-11 16:03:24,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:24,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028398941] [2020-09-11 16:03:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:25,097 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-11 16:03:25,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028398941] [2020-09-11 16:03:25,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159207063] [2020-09-11 16:03:25,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:25,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:03:25,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:25,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:03:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-11 16:03:25,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:25,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-09-11 16:03:25,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138006474] [2020-09-11 16:03:25,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 16:03:25,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:25,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 16:03:25,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-09-11 16:03:25,396 INFO L87 Difference]: Start difference. First operand 234 states and 464 transitions. Second operand 21 states. [2020-09-11 16:03:28,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:28,855 INFO L93 Difference]: Finished difference Result 290 states and 576 transitions. [2020-09-11 16:03:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-11 16:03:28,856 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-09-11 16:03:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:28,858 INFO L225 Difference]: With dead ends: 290 [2020-09-11 16:03:28,858 INFO L226 Difference]: Without dead ends: 290 [2020-09-11 16:03:28,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3905 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3510, Invalid=8262, Unknown=0, NotChecked=0, Total=11772 [2020-09-11 16:03:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-11 16:03:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2020-09-11 16:03:28,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-09-11 16:03:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 554 transitions. [2020-09-11 16:03:28,870 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 554 transitions. Word has length 35 [2020-09-11 16:03:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:28,870 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 554 transitions. [2020-09-11 16:03:28,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 16:03:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 554 transitions. [2020-09-11 16:03:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-11 16:03:28,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:28,872 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:29,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-11 16:03:29,085 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:29,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1024091301, now seen corresponding path program 11 times [2020-09-11 16:03:29,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:29,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154011160] [2020-09-11 16:03:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-11 16:03:29,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154011160] [2020-09-11 16:03:29,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091321939] [2020-09-11 16:03:29,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:29,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-11 16:03:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 16:03:29,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-09-11 16:03:29,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:29,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-09-11 16:03:29,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634096947] [2020-09-11 16:03:29,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:03:29,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:29,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:03:29,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:03:29,555 INFO L87 Difference]: Start difference. First operand 279 states and 554 transitions. Second operand 23 states. [2020-09-11 16:03:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:34,440 INFO L93 Difference]: Finished difference Result 340 states and 676 transitions. [2020-09-11 16:03:34,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-11 16:03:34,442 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-09-11 16:03:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:34,445 INFO L225 Difference]: With dead ends: 340 [2020-09-11 16:03:34,445 INFO L226 Difference]: Without dead ends: 340 [2020-09-11 16:03:34,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5877 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5005, Invalid=12025, Unknown=0, NotChecked=0, Total=17030 [2020-09-11 16:03:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-11 16:03:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2020-09-11 16:03:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-09-11 16:03:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 652 transitions. [2020-09-11 16:03:34,460 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 652 transitions. Word has length 38 [2020-09-11 16:03:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:34,460 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 652 transitions. [2020-09-11 16:03:34,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:03:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 652 transitions. [2020-09-11 16:03:34,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-11 16:03:34,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:34,462 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:34,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 16:03:34,700 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1006259789, now seen corresponding path program 12 times [2020-09-11 16:03:34,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:34,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391555067] [2020-09-11 16:03:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-11 16:03:34,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391555067] [2020-09-11 16:03:34,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995593886] [2020-09-11 16:03:34,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:35,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-11 16:03:35,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 16:03:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-09-11 16:03:35,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:35,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2020-09-11 16:03:35,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480994247] [2020-09-11 16:03:35,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 16:03:35,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:35,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 16:03:35,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 16:03:35,258 INFO L87 Difference]: Start difference. First operand 328 states and 652 transitions. Second operand 25 states. [2020-09-11 16:03:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:41,695 INFO L93 Difference]: Finished difference Result 394 states and 784 transitions. [2020-09-11 16:03:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-09-11 16:03:41,696 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-09-11 16:03:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:41,699 INFO L225 Difference]: With dead ends: 394 [2020-09-11 16:03:41,699 INFO L226 Difference]: Without dead ends: 394 [2020-09-11 16:03:41,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=6930, Invalid=16940, Unknown=0, NotChecked=0, Total=23870 [2020-09-11 16:03:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-11 16:03:41,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 381. [2020-09-11 16:03:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-09-11 16:03:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 758 transitions. [2020-09-11 16:03:41,714 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 758 transitions. Word has length 41 [2020-09-11 16:03:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:41,714 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 758 transitions. [2020-09-11 16:03:41,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 16:03:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 758 transitions. [2020-09-11 16:03:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-11 16:03:41,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:41,716 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:41,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 16:03:41,925 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash 519022635, now seen corresponding path program 13 times [2020-09-11 16:03:41,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:41,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728275077] [2020-09-11 16:03:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 16:03:42,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728275077] [2020-09-11 16:03:42,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512442705] [2020-09-11 16:03:42,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:42,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 16:03:42,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 16:03:42,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:42,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 16:03:42,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87487705] [2020-09-11 16:03:42,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 16:03:42,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:42,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 16:03:42,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:03:42,334 INFO L87 Difference]: Start difference. First operand 381 states and 758 transitions. Second operand 17 states. [2020-09-11 16:03:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:42,422 INFO L93 Difference]: Finished difference Result 420 states and 836 transitions. [2020-09-11 16:03:42,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 16:03:42,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-09-11 16:03:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:42,426 INFO L225 Difference]: With dead ends: 420 [2020-09-11 16:03:42,426 INFO L226 Difference]: Without dead ends: 420 [2020-09-11 16:03:42,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 16:03:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-09-11 16:03:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 407. [2020-09-11 16:03:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-09-11 16:03:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 810 transitions. [2020-09-11 16:03:42,439 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 810 transitions. Word has length 44 [2020-09-11 16:03:42,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:42,439 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 810 transitions. [2020-09-11 16:03:42,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 16:03:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 810 transitions. [2020-09-11 16:03:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-11 16:03:42,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:42,442 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:42,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:42,656 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash -942483170, now seen corresponding path program 14 times [2020-09-11 16:03:42,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:42,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311612945] [2020-09-11 16:03:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 16:03:42,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311612945] [2020-09-11 16:03:42,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362928179] [2020-09-11 16:03:42,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 16:03:43,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:03:43,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:43,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 16:03:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 16:03:43,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:43,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 16:03:43,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186682803] [2020-09-11 16:03:43,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 16:03:43,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:43,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 16:03:43,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:03:43,116 INFO L87 Difference]: Start difference. First operand 407 states and 810 transitions. Second operand 18 states. [2020-09-11 16:03:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:43,230 INFO L93 Difference]: Finished difference Result 446 states and 888 transitions. [2020-09-11 16:03:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 16:03:43,231 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-09-11 16:03:43,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:43,234 INFO L225 Difference]: With dead ends: 446 [2020-09-11 16:03:43,235 INFO L226 Difference]: Without dead ends: 446 [2020-09-11 16:03:43,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-11 16:03:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-09-11 16:03:43,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2020-09-11 16:03:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-09-11 16:03:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 862 transitions. [2020-09-11 16:03:43,246 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 862 transitions. Word has length 46 [2020-09-11 16:03:43,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:43,246 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 862 transitions. [2020-09-11 16:03:43,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 16:03:43,247 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 862 transitions. [2020-09-11 16:03:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-11 16:03:43,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:43,248 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:43,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 16:03:43,461 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash -995255983, now seen corresponding path program 15 times [2020-09-11 16:03:43,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:43,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539827013] [2020-09-11 16:03:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 16:03:43,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539827013] [2020-09-11 16:03:43,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385557591] [2020-09-11 16:03:43,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:43,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 16:03:43,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 16:03:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-09-11 16:03:44,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:44,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2020-09-11 16:03:44,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034130461] [2020-09-11 16:03:44,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-11 16:03:44,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:44,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-11 16:03:44,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-09-11 16:03:44,297 INFO L87 Difference]: Start difference. First operand 433 states and 862 transitions. Second operand 29 states. [2020-09-11 16:03:55,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:55,177 INFO L93 Difference]: Finished difference Result 508 states and 1012 transitions. [2020-09-11 16:03:55,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-09-11 16:03:55,177 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-09-11 16:03:55,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:55,180 INFO L225 Difference]: With dead ends: 508 [2020-09-11 16:03:55,181 INFO L226 Difference]: Without dead ends: 508 [2020-09-11 16:03:55,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15565 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=11934, Invalid=29886, Unknown=0, NotChecked=0, Total=41820 [2020-09-11 16:03:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-09-11 16:03:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2020-09-11 16:03:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-09-11 16:03:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 984 transitions. [2020-09-11 16:03:55,196 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 984 transitions. Word has length 48 [2020-09-11 16:03:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:55,196 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 984 transitions. [2020-09-11 16:03:55,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-11 16:03:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 984 transitions. [2020-09-11 16:03:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-11 16:03:55,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:55,198 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:55,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 16:03:55,411 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash -954639647, now seen corresponding path program 16 times [2020-09-11 16:03:55,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:55,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368650834] [2020-09-11 16:03:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-11 16:03:55,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368650834] [2020-09-11 16:03:55,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218875634] [2020-09-11 16:03:55,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:55,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 16:03:55,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 16:03:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-11 16:03:55,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:55,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 16:03:55,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534218190] [2020-09-11 16:03:55,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 16:03:55,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:55,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 16:03:55,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:03:55,908 INFO L87 Difference]: Start difference. First operand 494 states and 984 transitions. Second operand 20 states. [2020-09-11 16:03:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:03:55,988 INFO L93 Difference]: Finished difference Result 536 states and 1068 transitions. [2020-09-11 16:03:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 16:03:55,989 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-09-11 16:03:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:03:55,992 INFO L225 Difference]: With dead ends: 536 [2020-09-11 16:03:55,992 INFO L226 Difference]: Without dead ends: 536 [2020-09-11 16:03:55,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 16:03:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-11 16:03:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-11 16:03:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-11 16:03:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1040 transitions. [2020-09-11 16:03:56,005 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1040 transitions. Word has length 51 [2020-09-11 16:03:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:03:56,005 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 1040 transitions. [2020-09-11 16:03:56,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 16:03:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1040 transitions. [2020-09-11 16:03:56,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-11 16:03:56,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:03:56,007 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:03:56,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 16:03:56,222 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:03:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:03:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1140997490, now seen corresponding path program 17 times [2020-09-11 16:03:56,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:03:56,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576183677] [2020-09-11 16:03:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:03:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:03:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-11 16:03:56,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576183677] [2020-09-11 16:03:56,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068144963] [2020-09-11 16:03:56,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:03:56,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-09-11 16:03:56,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:03:56,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 16:03:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:03:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-09-11 16:03:56,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:03:56,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2020-09-11 16:03:56,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116053813] [2020-09-11 16:03:56,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-11 16:03:56,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:03:56,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-11 16:03:56,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-09-11 16:03:56,956 INFO L87 Difference]: Start difference. First operand 522 states and 1040 transitions. Second operand 32 states. [2020-09-11 16:04:12,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:04:12,725 INFO L93 Difference]: Finished difference Result 604 states and 1204 transitions. [2020-09-11 16:04:12,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2020-09-11 16:04:12,726 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 53 [2020-09-11 16:04:12,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:04:12,729 INFO L225 Difference]: With dead ends: 604 [2020-09-11 16:04:12,729 INFO L226 Difference]: Without dead ends: 604 [2020-09-11 16:04:12,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23424 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=17290, Invalid=43966, Unknown=0, NotChecked=0, Total=61256 [2020-09-11 16:04:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-11 16:04:12,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2020-09-11 16:04:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-09-11 16:04:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1174 transitions. [2020-09-11 16:04:12,747 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1174 transitions. Word has length 53 [2020-09-11 16:04:12,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:04:12,747 INFO L479 AbstractCegarLoop]: Abstraction has 589 states and 1174 transitions. [2020-09-11 16:04:12,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-11 16:04:12,747 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1174 transitions. [2020-09-11 16:04:12,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-11 16:04:12,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:04:12,749 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:04:12,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:04:12,962 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:04:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:04:12,963 INFO L82 PathProgramCache]: Analyzing trace with hash 625395594, now seen corresponding path program 18 times [2020-09-11 16:04:12,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:04:12,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935219617] [2020-09-11 16:04:12,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:04:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:04:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-11 16:04:13,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935219617] [2020-09-11 16:04:13,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032771940] [2020-09-11 16:04:13,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:04:13,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-11 16:04:13,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:04:13,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 16:04:13,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:04:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-09-11 16:04:13,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:04:13,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2020-09-11 16:04:13,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531159877] [2020-09-11 16:04:13,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-11 16:04:13,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:04:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-11 16:04:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 16:04:13,873 INFO L87 Difference]: Start difference. First operand 589 states and 1174 transitions. Second operand 34 states. [2020-09-11 16:04:34,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:04:34,388 INFO L93 Difference]: Finished difference Result 676 states and 1348 transitions. [2020-09-11 16:04:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2020-09-11 16:04:34,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-09-11 16:04:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:04:34,392 INFO L225 Difference]: With dead ends: 676 [2020-09-11 16:04:34,392 INFO L226 Difference]: Without dead ends: 676 [2020-09-11 16:04:34,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30615 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=22050, Invalid=56630, Unknown=0, NotChecked=0, Total=78680 [2020-09-11 16:04:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-09-11 16:04:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2020-09-11 16:04:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2020-09-11 16:04:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1316 transitions. [2020-09-11 16:04:34,409 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1316 transitions. Word has length 56 [2020-09-11 16:04:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:04:34,409 INFO L479 AbstractCegarLoop]: Abstraction has 660 states and 1316 transitions. [2020-09-11 16:04:34,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-11 16:04:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1316 transitions. [2020-09-11 16:04:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-11 16:04:34,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:04:34,412 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:04:34,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:04:34,626 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:04:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:04:34,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1598900536, now seen corresponding path program 19 times [2020-09-11 16:04:34,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:04:34,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893520321] [2020-09-11 16:04:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:04:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:04:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-11 16:04:35,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893520321] [2020-09-11 16:04:35,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481028989] [2020-09-11 16:04:35,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:04:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:04:35,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 16:04:35,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:04:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-11 16:04:35,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:04:35,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-11 16:04:35,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256220128] [2020-09-11 16:04:35,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 16:04:35,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:04:35,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 16:04:35,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:04:35,233 INFO L87 Difference]: Start difference. First operand 660 states and 1316 transitions. Second operand 23 states. [2020-09-11 16:04:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 16:04:35,357 INFO L93 Difference]: Finished difference Result 692 states and 1380 transitions. [2020-09-11 16:04:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 16:04:35,358 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-09-11 16:04:35,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 16:04:35,362 INFO L225 Difference]: With dead ends: 692 [2020-09-11 16:04:35,362 INFO L226 Difference]: Without dead ends: 692 [2020-09-11 16:04:35,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 16:04:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-09-11 16:04:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2020-09-11 16:04:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-09-11 16:04:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1380 transitions. [2020-09-11 16:04:35,378 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1380 transitions. Word has length 59 [2020-09-11 16:04:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 16:04:35,378 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 1380 transitions. [2020-09-11 16:04:35,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 16:04:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1380 transitions. [2020-09-11 16:04:35,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-11 16:04:35,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 16:04:35,381 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 16:04:35,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 16:04:35,595 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 16:04:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 16:04:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash 746529141, now seen corresponding path program 20 times [2020-09-11 16:04:35,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 16:04:35,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908351826] [2020-09-11 16:04:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 16:04:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 16:04:35,881 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-11 16:04:35,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908351826] [2020-09-11 16:04:35,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948626481] [2020-09-11 16:04:35,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 16:04:35,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 16:04:35,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 16:04:35,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2020-09-11 16:04:35,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 16:04:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 16:04:38,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 16:04:38,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 54] total 70 [2020-09-11 16:04:38,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938497671] [2020-09-11 16:04:38,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-11 16:04:38,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 16:04:38,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-11 16:04:38,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2020-09-11 16:04:38,561 INFO L87 Difference]: Start difference. First operand 692 states and 1380 transitions. Second operand 70 states. Received shutdown request... [2020-09-11 16:07:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1448 states. [2020-09-11 16:07:02,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 16:07:02,620 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 16:07:02,625 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 16:07:02,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 04:07:02 BasicIcfg [2020-09-11 16:07:02,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 16:07:02,629 INFO L168 Benchmark]: Toolchain (without parser) took 237016.48 ms. Allocated memory was 139.5 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 100.1 MB in the beginning and 112.2 MB in the end (delta: -12.1 MB). Peak memory consumption was 988.2 MB. Max. memory is 7.1 GB. [2020-09-11 16:07:02,636 INFO L168 Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 16:07:02,637 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1233.97 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 99.5 MB in the beginning and 108.0 MB in the end (delta: -8.5 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-09-11 16:07:02,638 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.71 ms. Allocated memory is still 203.9 MB. Free memory was 108.0 MB in the beginning and 105.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-11 16:07:02,639 INFO L168 Benchmark]: Boogie Preprocessor took 36.67 ms. Allocated memory is still 203.9 MB. Free memory was 105.2 MB in the beginning and 103.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-11 16:07:02,639 INFO L168 Benchmark]: RCFGBuilder took 539.45 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 103.8 MB in the beginning and 195.1 MB in the end (delta: -91.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-09-11 16:07:02,640 INFO L168 Benchmark]: TraceAbstraction took 235110.75 ms. Allocated memory was 236.5 MB in the beginning and 1.1 GB in the end (delta: 903.3 MB). Free memory was 195.1 MB in the beginning and 112.2 MB in the end (delta: 82.9 MB). Peak memory consumption was 986.2 MB. Max. memory is 7.1 GB. [2020-09-11 16:07:02,642 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1233.97 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 99.5 MB in the beginning and 108.0 MB in the end (delta: -8.5 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 81.71 ms. Allocated memory is still 203.9 MB. Free memory was 108.0 MB in the beginning and 105.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.67 ms. Allocated memory is still 203.9 MB. Free memory was 105.2 MB in the beginning and 103.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 539.45 ms. Allocated memory was 203.9 MB in the beginning and 236.5 MB in the end (delta: 32.5 MB). Free memory was 103.8 MB in the beginning and 195.1 MB in the end (delta: -91.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235110.75 ms. Allocated memory was 236.5 MB in the beginning and 1.1 GB in the end (delta: 903.3 MB). Free memory was 195.1 MB in the beginning and 112.2 MB in the end (delta: 82.9 MB). Peak memory consumption was 986.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 5.9s, 82 ProgramPointsBefore, 15 ProgramPointsAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 328 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 510 CheckedPairsTotal, 78 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (692states) and FLOYD_HOARE automaton (currently 1448 states, 70 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 1507 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 234.9s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 212.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.0s, HoareTripleCheckerStatistics: 275 SDtfs, 2992 SDslu, 2428 SDs, 0 SdLazy, 3640 SolverSat, 3968 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4936 GetRequests, 1977 SyntacticMatches, 0 SemanticMatches, 2958 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522810 ImplicationChecksByTransitivity, 189.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=692occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 193 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 1484 NumberOfCodeBlocks, 1428 NumberOfCodeBlocksAsserted, 124 NumberOfCheckSat, 1441 ConstructedInterpolants, 0 QuantifiedInterpolants, 143605 SizeOfPredicates, 60 NumberOfNonLiveVariables, 4004 ConjunctsInSsa, 256 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 2760/7276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown