/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 19:11:02,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 19:11:02,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 19:11:02,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 19:11:02,487 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 19:11:02,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 19:11:02,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 19:11:02,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 19:11:02,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 19:11:02,494 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 19:11:02,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 19:11:02,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 19:11:02,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 19:11:02,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 19:11:02,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 19:11:02,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 19:11:02,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 19:11:02,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 19:11:02,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 19:11:02,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 19:11:02,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 19:11:02,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 19:11:02,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 19:11:02,508 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 19:11:02,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 19:11:02,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 19:11:02,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 19:11:02,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 19:11:02,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 19:11:02,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 19:11:02,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 19:11:02,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 19:11:02,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 19:11:02,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 19:11:02,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 19:11:02,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 19:11:02,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 19:11:02,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 19:11:02,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 19:11:02,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 19:11:02,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 19:11:02,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 19:11:02,542 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 19:11:02,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 19:11:02,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 19:11:02,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 19:11:02,544 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 19:11:02,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 19:11:02,545 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 19:11:02,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 19:11:02,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 19:11:02,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 19:11:02,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 19:11:02,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 19:11:02,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 19:11:02,546 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 19:11:02,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 19:11:02,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 19:11:02,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 19:11:02,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 19:11:02,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 19:11:02,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 19:11:02,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 19:11:02,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:11:02,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 19:11:02,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 19:11:02,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 19:11:02,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 19:11:02,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 19:11:02,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 19:11:02,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 19:11:02,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 19:11:02,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 19:11:02,840 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 19:11:02,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 19:11:02,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 19:11:02,850 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 19:11:02,851 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-15 19:11:02,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b010746cc/ca79f61f71b84e23b8cdab6db2e62823/FLAG61d4df4c5 [2020-10-15 19:11:03,518 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 19:11:03,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-15 19:11:03,540 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b010746cc/ca79f61f71b84e23b8cdab6db2e62823/FLAG61d4df4c5 [2020-10-15 19:11:03,769 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b010746cc/ca79f61f71b84e23b8cdab6db2e62823 [2020-10-15 19:11:03,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 19:11:03,779 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 19:11:03,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 19:11:03,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 19:11:03,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 19:11:03,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ee6a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:03, skipping insertion in model container [2020-10-15 19:11:03,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:11:03" (1/1) ... [2020-10-15 19:11:03,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 19:11:03,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 19:11:04,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:11:04,620 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 19:11:04,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:11:04,898 INFO L208 MainTranslator]: Completed translation [2020-10-15 19:11:04,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04 WrapperNode [2020-10-15 19:11:04,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 19:11:04,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 19:11:04,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 19:11:04,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 19:11:04,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:04,959 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:04,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 19:11:04,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 19:11:04,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 19:11:04,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 19:11:04,995 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:04,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:04,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:04,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:05,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:05,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:05,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... [2020-10-15 19:11:05,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 19:11:05,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 19:11:05,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 19:11:05,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 19:11:05,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:11:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 19:11:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 19:11:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 19:11:05,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-10-15 19:11:05,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-10-15 19:11:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 19:11:05,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 19:11:05,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 19:11:05,095 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 19:11:05,541 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 19:11:05,542 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-15 19:11:05,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:11:05 BoogieIcfgContainer [2020-10-15 19:11:05,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 19:11:05,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 19:11:05,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 19:11:05,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 19:11:05,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:11:03" (1/3) ... [2020-10-15 19:11:05,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44059060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:11:05, skipping insertion in model container [2020-10-15 19:11:05,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:11:04" (2/3) ... [2020-10-15 19:11:05,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44059060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:11:05, skipping insertion in model container [2020-10-15 19:11:05,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:11:05" (3/3) ... [2020-10-15 19:11:05,555 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-10-15 19:11:05,567 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 19:11:05,567 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 19:11:05,575 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 19:11:05,576 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 19:11:05,601 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,601 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,602 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,602 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,602 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,603 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,603 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,603 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,603 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,604 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,604 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,604 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,604 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,605 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,605 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,605 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,606 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,606 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,606 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,606 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,607 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,610 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,611 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,611 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,611 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,611 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,611 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,612 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,612 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:11:05,630 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 19:11:05,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 19:11:05,649 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 19:11:05,649 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 19:11:05,650 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 19:11:05,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 19:11:05,650 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 19:11:05,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 19:11:05,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 19:11:05,665 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 19:11:05,668 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-10-15 19:11:05,671 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 85 transitions, 178 flow [2020-10-15 19:11:05,673 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-10-15 19:11:05,722 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-10-15 19:11:05,723 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-15 19:11:05,729 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. [2020-10-15 19:11:05,732 INFO L117 LiptonReduction]: Number of co-enabled transitions 640 [2020-10-15 19:11:07,004 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-15 19:11:07,204 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-15 19:11:07,822 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-15 19:11:08,109 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-15 19:11:08,611 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-15 19:11:08,995 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-15 19:11:10,352 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-10-15 19:11:10,992 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-15 19:11:10,995 INFO L132 LiptonReduction]: Checked pairs total: 580 [2020-10-15 19:11:10,995 INFO L134 LiptonReduction]: Total number of compositions: 83 [2020-10-15 19:11:11,002 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-10-15 19:11:11,011 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-10-15 19:11:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-15 19:11:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:11:11,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:11,021 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:11,021 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:11,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:11,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-10-15 19:11:11,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:11,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284311594] [2020-10-15 19:11:11,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:11,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284311594] [2020-10-15 19:11:11,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:11:11,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:11:11,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825239878] [2020-10-15 19:11:11,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 19:11:11,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:11,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 19:11:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 19:11:11,280 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-15 19:11:11,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:11,322 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-10-15 19:11:11,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 19:11:11,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-15 19:11:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:11,335 INFO L225 Difference]: With dead ends: 20 [2020-10-15 19:11:11,336 INFO L226 Difference]: Without dead ends: 20 [2020-10-15 19:11:11,337 INFO L677 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 [2020-10-15 19:11:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-15 19:11:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-15 19:11:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 19:11:11,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-10-15 19:11:11,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-10-15 19:11:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:11,375 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-10-15 19:11:11,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 19:11:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-10-15 19:11:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:11:11,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:11,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:11,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 19:11:11,377 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:11,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:11,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-10-15 19:11:11,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:11,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949501294] [2020-10-15 19:11:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:11,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949501294] [2020-10-15 19:11:11,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966500170] [2020-10-15 19:11:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-15 19:11:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 19:11:11,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 19:11:11,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-15 19:11:11,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927561393] [2020-10-15 19:11:11,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 19:11:11,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:11,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 19:11:11,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:11:11,571 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-10-15 19:11:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:11,584 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-10-15 19:11:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 19:11:11,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-15 19:11:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:11,585 INFO L225 Difference]: With dead ends: 28 [2020-10-15 19:11:11,586 INFO L226 Difference]: Without dead ends: 28 [2020-10-15 19:11:11,587 INFO L677 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 [2020-10-15 19:11:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-15 19:11:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-15 19:11:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-15 19:11:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-10-15 19:11:11,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-10-15 19:11:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:11,594 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-10-15 19:11:11,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 19:11:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-10-15 19:11:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:11:11,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:11,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:11,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-15 19:11:11,810 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:11,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:11,810 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-10-15 19:11:11,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:11,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941589714] [2020-10-15 19:11:11,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:11:11,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941589714] [2020-10-15 19:11:11,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429300705] [2020-10-15 19:11:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:11,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-15 19:11:11,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 19:11:11,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:11,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-15 19:11:11,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723931906] [2020-10-15 19:11:11,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:11:11,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:11,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:11:11,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:11:11,965 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-10-15 19:11:12,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:12,082 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-10-15 19:11:12,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:11:12,083 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-15 19:11:12,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:12,084 INFO L225 Difference]: With dead ends: 44 [2020-10-15 19:11:12,084 INFO L226 Difference]: Without dead ends: 44 [2020-10-15 19:11:12,085 INFO L677 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 [2020-10-15 19:11:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-15 19:11:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-15 19:11:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-15 19:11:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-10-15 19:11:12,092 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-10-15 19:11:12,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:12,093 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-10-15 19:11:12,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:11:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-10-15 19:11:12,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:11:12,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:12,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:12,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:12,295 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:12,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-10-15 19:11:12,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:12,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222300540] [2020-10-15 19:11:12,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 19:11:12,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222300540] [2020-10-15 19:11:12,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769870848] [2020-10-15 19:11:12,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:12,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:12,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:12,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 19:11:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 19:11:12,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:12,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-15 19:11:12,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324177490] [2020-10-15 19:11:12,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:11:12,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:12,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:11:12,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:11:12,534 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-10-15 19:11:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:12,574 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-10-15 19:11:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:11:12,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-15 19:11:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:12,580 INFO L225 Difference]: With dead ends: 54 [2020-10-15 19:11:12,580 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 19:11:12,581 INFO L677 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 [2020-10-15 19:11:12,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 19:11:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-15 19:11:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-15 19:11:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-10-15 19:11:12,591 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-10-15 19:11:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:12,591 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-10-15 19:11:12,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:11:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-10-15 19:11:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 19:11:12,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:12,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:12,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:12,797 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-10-15 19:11:12,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:12,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627805354] [2020-10-15 19:11:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-15 19:11:12,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627805354] [2020-10-15 19:11:12,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427138111] [2020-10-15 19:11:12,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:12,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:11:12,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 19:11:12,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 19:11:13,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:13,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-15 19:11:13,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347358019] [2020-10-15 19:11:13,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:11:13,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:13,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:11:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:11:13,020 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-10-15 19:11:13,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:13,295 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-10-15 19:11:13,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:11:13,300 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-15 19:11:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:13,301 INFO L225 Difference]: With dead ends: 76 [2020-10-15 19:11:13,301 INFO L226 Difference]: Without dead ends: 76 [2020-10-15 19:11:13,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:11:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-15 19:11:13,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-10-15 19:11:13,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-15 19:11:13,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-10-15 19:11:13,315 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-10-15 19:11:13,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:13,316 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-10-15 19:11:13,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:11:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-10-15 19:11:13,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 19:11:13,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:13,317 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:13,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:13,527 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:13,528 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-10-15 19:11:13,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:13,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110180007] [2020-10-15 19:11:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 19:11:13,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110180007] [2020-10-15 19:11:13,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979408049] [2020-10-15 19:11:13,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:13,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:11:13,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:13,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-15 19:11:13,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 19:11:13,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:13,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-15 19:11:13,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19309094] [2020-10-15 19:11:13,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 19:11:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 19:11:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 19:11:13,745 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 8 states. [2020-10-15 19:11:13,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:13,773 INFO L93 Difference]: Finished difference Result 88 states and 172 transitions. [2020-10-15 19:11:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:11:13,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-15 19:11:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:13,775 INFO L225 Difference]: With dead ends: 88 [2020-10-15 19:11:13,775 INFO L226 Difference]: Without dead ends: 88 [2020-10-15 19:11:13,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-15 19:11:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-15 19:11:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-10-15 19:11:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:11:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 160 transitions. [2020-10-15 19:11:13,790 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 160 transitions. Word has length 19 [2020-10-15 19:11:13,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:13,790 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 160 transitions. [2020-10-15 19:11:13,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 19:11:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 160 transitions. [2020-10-15 19:11:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-15 19:11:13,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:13,791 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:13,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-15 19:11:13,992 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash -882362510, now seen corresponding path program 5 times [2020-10-15 19:11:13,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:13,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744159185] [2020-10-15 19:11:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 19:11:14,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744159185] [2020-10-15 19:11:14,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732431720] [2020-10-15 19:11:14,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:14,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-15 19:11:14,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:14,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-15 19:11:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 19:11:14,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:14,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-10-15 19:11:14,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020712317] [2020-10-15 19:11:14,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 19:11:14,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:14,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 19:11:14,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:11:14,187 INFO L87 Difference]: Start difference. First operand 82 states and 160 transitions. Second operand 12 states. [2020-10-15 19:11:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:14,708 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2020-10-15 19:11:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-15 19:11:14,711 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-15 19:11:14,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:14,712 INFO L225 Difference]: With dead ends: 116 [2020-10-15 19:11:14,712 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 19:11:14,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:11:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 19:11:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-15 19:11:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-15 19:11:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 214 transitions. [2020-10-15 19:11:14,723 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 214 transitions. Word has length 21 [2020-10-15 19:11:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:14,723 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 214 transitions. [2020-10-15 19:11:14,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 19:11:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 214 transitions. [2020-10-15 19:11:14,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 19:11:14,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:14,725 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:14,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:14,941 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1928037594, now seen corresponding path program 6 times [2020-10-15 19:11:14,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:14,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386445585] [2020-10-15 19:11:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 19:11:15,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386445585] [2020-10-15 19:11:15,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676940048] [2020-10-15 19:11:15,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:15,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-15 19:11:15,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-15 19:11:15,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-15 19:11:15,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:15,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-10-15 19:11:15,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716895020] [2020-10-15 19:11:15,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 19:11:15,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:15,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 19:11:15,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:11:15,279 INFO L87 Difference]: Start difference. First operand 109 states and 214 transitions. Second operand 14 states. [2020-10-15 19:11:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:16,057 INFO L93 Difference]: Finished difference Result 148 states and 292 transitions. [2020-10-15 19:11:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-15 19:11:16,058 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-15 19:11:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:16,059 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:11:16,059 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 19:11:16,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-10-15 19:11:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 19:11:16,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2020-10-15 19:11:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:11:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 276 transitions. [2020-10-15 19:11:16,081 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 276 transitions. Word has length 24 [2020-10-15 19:11:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:16,081 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 276 transitions. [2020-10-15 19:11:16,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 19:11:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 276 transitions. [2020-10-15 19:11:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 19:11:16,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:16,083 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:16,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:16,295 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:16,296 INFO L82 PathProgramCache]: Analyzing trace with hash 867592876, now seen corresponding path program 7 times [2020-10-15 19:11:16,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:16,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241841377] [2020-10-15 19:11:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 19:11:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241841377] [2020-10-15 19:11:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509003633] [2020-10-15 19:11:16,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:16,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:16,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:11:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 19:11:16,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:16,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-15 19:11:16,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013458065] [2020-10-15 19:11:16,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:11:16,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:11:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:11:16,539 INFO L87 Difference]: Start difference. First operand 140 states and 276 transitions. Second operand 11 states. [2020-10-15 19:11:16,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:16,588 INFO L93 Difference]: Finished difference Result 164 states and 324 transitions. [2020-10-15 19:11:16,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:11:16,589 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-15 19:11:16,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:16,591 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:11:16,591 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 19:11:16,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:11:16,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 19:11:16,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2020-10-15 19:11:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:11:16,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 308 transitions. [2020-10-15 19:11:16,600 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 308 transitions. Word has length 27 [2020-10-15 19:11:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:16,600 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 308 transitions. [2020-10-15 19:11:16,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:11:16,601 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 308 transitions. [2020-10-15 19:11:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 19:11:16,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:16,603 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:16,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-15 19:11:16,816 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash -441398951, now seen corresponding path program 8 times [2020-10-15 19:11:16,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:16,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189057914] [2020-10-15 19:11:16,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 19:11:16,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189057914] [2020-10-15 19:11:16,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299688901] [2020-10-15 19:11:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:16,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:16,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:16,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:11:16,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 19:11:17,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:17,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-15 19:11:17,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009667345] [2020-10-15 19:11:17,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 19:11:17,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:17,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 19:11:17,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:11:17,020 INFO L87 Difference]: Start difference. First operand 156 states and 308 transitions. Second operand 12 states. [2020-10-15 19:11:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:17,076 INFO L93 Difference]: Finished difference Result 180 states and 356 transitions. [2020-10-15 19:11:17,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:11:17,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-15 19:11:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:17,078 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:11:17,079 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:11:17,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:11:17,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:11:17,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-15 19:11:17,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 19:11:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 340 transitions. [2020-10-15 19:11:17,087 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 340 transitions. Word has length 29 [2020-10-15 19:11:17,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:17,087 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 340 transitions. [2020-10-15 19:11:17,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 19:11:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 340 transitions. [2020-10-15 19:11:17,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 19:11:17,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:17,089 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:17,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:17,304 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:17,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:17,305 INFO L82 PathProgramCache]: Analyzing trace with hash 42873030, now seen corresponding path program 9 times [2020-10-15 19:11:17,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:17,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348504085] [2020-10-15 19:11:17,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-15 19:11:17,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348504085] [2020-10-15 19:11:17,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192295830] [2020-10-15 19:11:17,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:17,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-15 19:11:17,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:17,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:11:17,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-15 19:11:17,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:17,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-10-15 19:11:17,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715704701] [2020-10-15 19:11:17,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:11:17,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:17,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:11:17,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:11:17,615 INFO L87 Difference]: Start difference. First operand 172 states and 340 transitions. Second operand 18 states. [2020-10-15 19:11:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:19,249 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2020-10-15 19:11:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-15 19:11:19,250 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-15 19:11:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:19,251 INFO L225 Difference]: With dead ends: 220 [2020-10-15 19:11:19,251 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 19:11:19,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1848, Invalid=4158, Unknown=0, NotChecked=0, Total=6006 [2020-10-15 19:11:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 19:11:19,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2020-10-15 19:11:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-15 19:11:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 418 transitions. [2020-10-15 19:11:19,261 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 418 transitions. Word has length 31 [2020-10-15 19:11:19,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:19,264 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 418 transitions. [2020-10-15 19:11:19,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:11:19,264 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 418 transitions. [2020-10-15 19:11:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 19:11:19,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:19,267 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:19,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:19,482 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1510869138, now seen corresponding path program 10 times [2020-10-15 19:11:19,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:19,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131934559] [2020-10-15 19:11:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-15 19:11:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131934559] [2020-10-15 19:11:19,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600712529] [2020-10-15 19:11:19,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:19,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:11:19,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:19,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 19:11:19,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-15 19:11:19,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:19,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-15 19:11:19,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103472052] [2020-10-15 19:11:19,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 19:11:19,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:19,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 19:11:19,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:11:19,698 INFO L87 Difference]: Start difference. First operand 211 states and 418 transitions. Second operand 14 states. [2020-10-15 19:11:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:19,747 INFO L93 Difference]: Finished difference Result 238 states and 472 transitions. [2020-10-15 19:11:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:11:19,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-15 19:11:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:19,749 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:11:19,750 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 19:11:19,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:11:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 19:11:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 229. [2020-10-15 19:11:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-15 19:11:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 454 transitions. [2020-10-15 19:11:19,756 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 454 transitions. Word has length 34 [2020-10-15 19:11:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:19,757 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 454 transitions. [2020-10-15 19:11:19,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 19:11:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 454 transitions. [2020-10-15 19:11:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-15 19:11:19,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:19,758 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:19,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-15 19:11:19,973 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:19,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1014578501, now seen corresponding path program 11 times [2020-10-15 19:11:19,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:19,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8571306] [2020-10-15 19:11:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-15 19:11:20,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8571306] [2020-10-15 19:11:20,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534155472] [2020-10-15 19:11:20,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:20,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-15 19:11:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:20,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:11:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:20,283 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-15 19:11:20,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:20,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-10-15 19:11:20,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089686498] [2020-10-15 19:11:20,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-15 19:11:20,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:20,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-15 19:11:20,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:11:20,286 INFO L87 Difference]: Start difference. First operand 229 states and 454 transitions. Second operand 21 states. [2020-10-15 19:11:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:22,935 INFO L93 Difference]: Finished difference Result 284 states and 564 transitions. [2020-10-15 19:11:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-15 19:11:22,936 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-15 19:11:22,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:22,938 INFO L225 Difference]: With dead ends: 284 [2020-10-15 19:11:22,938 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 19:11:22,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3276, Invalid=7644, Unknown=0, NotChecked=0, Total=10920 [2020-10-15 19:11:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 19:11:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 274. [2020-10-15 19:11:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-15 19:11:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 544 transitions. [2020-10-15 19:11:22,953 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 544 transitions. Word has length 36 [2020-10-15 19:11:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:22,953 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 544 transitions. [2020-10-15 19:11:22,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-15 19:11:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 544 transitions. [2020-10-15 19:11:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-15 19:11:22,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:22,955 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:23,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 19:11:23,169 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash -299405075, now seen corresponding path program 12 times [2020-10-15 19:11:23,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:23,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057798482] [2020-10-15 19:11:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-15 19:11:23,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057798482] [2020-10-15 19:11:23,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365039334] [2020-10-15 19:11:23,316 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:23,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-15 19:11:23,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:23,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:11:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-15 19:11:23,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:23,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2020-10-15 19:11:23,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092767209] [2020-10-15 19:11:23,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:11:23,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:11:23,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:11:23,559 INFO L87 Difference]: Start difference. First operand 274 states and 544 transitions. Second operand 23 states. [2020-10-15 19:11:27,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:27,208 INFO L93 Difference]: Finished difference Result 334 states and 664 transitions. [2020-10-15 19:11:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-15 19:11:27,209 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-10-15 19:11:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:27,210 INFO L225 Difference]: With dead ends: 334 [2020-10-15 19:11:27,211 INFO L226 Difference]: Without dead ends: 334 [2020-10-15 19:11:27,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4725, Invalid=11277, Unknown=0, NotChecked=0, Total=16002 [2020-10-15 19:11:27,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-15 19:11:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 323. [2020-10-15 19:11:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-15 19:11:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 642 transitions. [2020-10-15 19:11:27,224 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 642 transitions. Word has length 39 [2020-10-15 19:11:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:27,224 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 642 transitions. [2020-10-15 19:11:27,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:11:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 642 transitions. [2020-10-15 19:11:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-15 19:11:27,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:27,226 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:27,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-15 19:11:27,440 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:27,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1077564853, now seen corresponding path program 13 times [2020-10-15 19:11:27,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:27,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469974921] [2020-10-15 19:11:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-15 19:11:27,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469974921] [2020-10-15 19:11:27,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268798923] [2020-10-15 19:11:27,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:27,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-15 19:11:27,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-15 19:11:27,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:27,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-15 19:11:27,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614343800] [2020-10-15 19:11:27,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:11:27,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:27,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:11:27,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:11:27,759 INFO L87 Difference]: Start difference. First operand 323 states and 642 transitions. Second operand 17 states. [2020-10-15 19:11:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:27,820 INFO L93 Difference]: Finished difference Result 356 states and 708 transitions. [2020-10-15 19:11:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:11:27,820 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-15 19:11:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:27,823 INFO L225 Difference]: With dead ends: 356 [2020-10-15 19:11:27,823 INFO L226 Difference]: Without dead ends: 356 [2020-10-15 19:11:27,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:11:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-15 19:11:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 345. [2020-10-15 19:11:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 19:11:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 686 transitions. [2020-10-15 19:11:27,835 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 686 transitions. Word has length 42 [2020-10-15 19:11:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:27,835 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 686 transitions. [2020-10-15 19:11:27,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:11:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 686 transitions. [2020-10-15 19:11:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-15 19:11:27,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:27,838 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:28,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:28,053 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1718191106, now seen corresponding path program 14 times [2020-10-15 19:11:28,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:28,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253046500] [2020-10-15 19:11:28,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-15 19:11:28,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253046500] [2020-10-15 19:11:28,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472526939] [2020-10-15 19:11:28,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:28,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:28,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:28,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 19:11:28,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-15 19:11:28,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:28,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-15 19:11:28,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765183415] [2020-10-15 19:11:28,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:11:28,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:28,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:11:28,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:11:28,396 INFO L87 Difference]: Start difference. First operand 345 states and 686 transitions. Second operand 18 states. [2020-10-15 19:11:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:28,463 INFO L93 Difference]: Finished difference Result 378 states and 752 transitions. [2020-10-15 19:11:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:11:28,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-15 19:11:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:28,466 INFO L225 Difference]: With dead ends: 378 [2020-10-15 19:11:28,466 INFO L226 Difference]: Without dead ends: 378 [2020-10-15 19:11:28,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:11:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-15 19:11:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2020-10-15 19:11:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-15 19:11:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 730 transitions. [2020-10-15 19:11:28,476 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 730 transitions. Word has length 44 [2020-10-15 19:11:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:28,476 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 730 transitions. [2020-10-15 19:11:28,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:11:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 730 transitions. [2020-10-15 19:11:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 19:11:28,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:28,478 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:28,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 19:11:28,691 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1115270385, now seen corresponding path program 15 times [2020-10-15 19:11:28,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:28,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084449840] [2020-10-15 19:11:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:28,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:28,892 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-15 19:11:28,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084449840] [2020-10-15 19:11:28,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16525038] [2020-10-15 19:11:28,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:11:28,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-15 19:11:28,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:11:28,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-15 19:11:29,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:29,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2020-10-15 19:11:29,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652125292] [2020-10-15 19:11:29,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-15 19:11:29,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:29,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-15 19:11:29,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:11:29,129 INFO L87 Difference]: Start difference. First operand 367 states and 730 transitions. Second operand 27 states. [2020-10-15 19:11:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:35,376 INFO L93 Difference]: Finished difference Result 436 states and 868 transitions. [2020-10-15 19:11:35,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2020-10-15 19:11:35,377 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2020-10-15 19:11:35,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:35,379 INFO L225 Difference]: With dead ends: 436 [2020-10-15 19:11:35,379 INFO L226 Difference]: Without dead ends: 436 [2020-10-15 19:11:35,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10431 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8415, Invalid=20655, Unknown=0, NotChecked=0, Total=29070 [2020-10-15 19:11:35,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-15 19:11:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 424. [2020-10-15 19:11:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-10-15 19:11:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 844 transitions. [2020-10-15 19:11:35,396 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 844 transitions. Word has length 46 [2020-10-15 19:11:35,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:35,396 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 844 transitions. [2020-10-15 19:11:35,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-15 19:11:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 844 transitions. [2020-10-15 19:11:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 19:11:35,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:35,398 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:35,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 19:11:35,612 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:35,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:35,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1391947135, now seen corresponding path program 16 times [2020-10-15 19:11:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:35,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816040287] [2020-10-15 19:11:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:35,809 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-15 19:11:35,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816040287] [2020-10-15 19:11:35,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918572102] [2020-10-15 19:11:35,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:11:35,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:11:35,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:35,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-15 19:11:35,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-15 19:11:35,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:35,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-15 19:11:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374078308] [2020-10-15 19:11:35,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 19:11:35,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:35,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 19:11:35,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:11:35,924 INFO L87 Difference]: Start difference. First operand 424 states and 844 transitions. Second operand 20 states. [2020-10-15 19:11:36,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:36,006 INFO L93 Difference]: Finished difference Result 460 states and 916 transitions. [2020-10-15 19:11:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:11:36,007 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-15 19:11:36,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:36,009 INFO L225 Difference]: With dead ends: 460 [2020-10-15 19:11:36,010 INFO L226 Difference]: Without dead ends: 460 [2020-10-15 19:11:36,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:11:36,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-15 19:11:36,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 448. [2020-10-15 19:11:36,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-15 19:11:36,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 892 transitions. [2020-10-15 19:11:36,021 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 892 transitions. Word has length 49 [2020-10-15 19:11:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:36,021 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 892 transitions. [2020-10-15 19:11:36,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 19:11:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 892 transitions. [2020-10-15 19:11:36,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-15 19:11:36,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:36,022 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:36,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 19:11:36,236 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1588788882, now seen corresponding path program 17 times [2020-10-15 19:11:36,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:36,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139485305] [2020-10-15 19:11:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-15 19:11:36,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139485305] [2020-10-15 19:11:36,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025369861] [2020-10-15 19:11:36,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:11:36,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-15 19:11:36,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:11:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-15 19:11:36,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:36,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2020-10-15 19:11:36,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169162247] [2020-10-15 19:11:36,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-15 19:11:36,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:36,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-15 19:11:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=615, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:11:36,764 INFO L87 Difference]: Start difference. First operand 448 states and 892 transitions. Second operand 30 states. [2020-10-15 19:11:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:45,838 INFO L93 Difference]: Finished difference Result 524 states and 1044 transitions. [2020-10-15 19:11:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2020-10-15 19:11:45,839 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 51 [2020-10-15 19:11:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:45,841 INFO L225 Difference]: With dead ends: 524 [2020-10-15 19:11:45,841 INFO L226 Difference]: Without dead ends: 524 [2020-10-15 19:11:45,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16280 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=12540, Invalid=31350, Unknown=0, NotChecked=0, Total=43890 [2020-10-15 19:11:45,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-15 19:11:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 511. [2020-10-15 19:11:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-15 19:11:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1018 transitions. [2020-10-15 19:11:45,855 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1018 transitions. Word has length 51 [2020-10-15 19:11:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:45,855 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 1018 transitions. [2020-10-15 19:11:45,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-15 19:11:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1018 transitions. [2020-10-15 19:11:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-15 19:11:45,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:45,857 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:46,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:46,072 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash 835392874, now seen corresponding path program 18 times [2020-10-15 19:11:46,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:46,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696245835] [2020-10-15 19:11:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-15 19:11:46,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696245835] [2020-10-15 19:11:46,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388714061] [2020-10-15 19:11:46,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:11:46,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-15 19:11:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 19:11:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 18 proven. 55 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-15 19:11:46,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:46,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2020-10-15 19:11:46,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456334234] [2020-10-15 19:11:46,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-15 19:11:46,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:46,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-15 19:11:46,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:11:46,708 INFO L87 Difference]: Start difference. First operand 511 states and 1018 transitions. Second operand 32 states. [2020-10-15 19:11:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:58,540 INFO L93 Difference]: Finished difference Result 592 states and 1180 transitions. [2020-10-15 19:11:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2020-10-15 19:11:58,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 54 [2020-10-15 19:11:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:58,543 INFO L225 Difference]: With dead ends: 592 [2020-10-15 19:11:58,543 INFO L226 Difference]: Without dead ends: 592 [2020-10-15 19:11:58,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21934 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=16380, Invalid=41460, Unknown=0, NotChecked=0, Total=57840 [2020-10-15 19:11:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-15 19:11:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 578. [2020-10-15 19:11:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-15 19:11:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1152 transitions. [2020-10-15 19:11:58,558 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1152 transitions. Word has length 54 [2020-10-15 19:11:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:58,558 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 1152 transitions. [2020-10-15 19:11:58,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-15 19:11:58,558 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1152 transitions. [2020-10-15 19:11:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-15 19:11:58,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:58,560 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:58,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:11:58,774 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1589265368, now seen corresponding path program 19 times [2020-10-15 19:11:58,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:58,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753648440] [2020-10-15 19:11:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-15 19:11:59,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753648440] [2020-10-15 19:11:59,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478872387] [2020-10-15 19:11:59,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:11:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:59,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-15 19:11:59,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:11:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-15 19:11:59,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:11:59,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-15 19:11:59,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115082881] [2020-10-15 19:11:59,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 19:11:59,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:11:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 19:11:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:11:59,183 INFO L87 Difference]: Start difference. First operand 578 states and 1152 transitions. Second operand 23 states. [2020-10-15 19:11:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:11:59,270 INFO L93 Difference]: Finished difference Result 606 states and 1208 transitions. [2020-10-15 19:11:59,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:11:59,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-15 19:11:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:11:59,275 INFO L225 Difference]: With dead ends: 606 [2020-10-15 19:11:59,275 INFO L226 Difference]: Without dead ends: 606 [2020-10-15 19:11:59,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:11:59,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-15 19:11:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2020-10-15 19:11:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-10-15 19:11:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1208 transitions. [2020-10-15 19:11:59,286 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1208 transitions. Word has length 57 [2020-10-15 19:11:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:11:59,287 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 1208 transitions. [2020-10-15 19:11:59,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 19:11:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1208 transitions. [2020-10-15 19:11:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-15 19:11:59,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:11:59,289 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:11:59,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 19:11:59,505 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:11:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:11:59,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1130959339, now seen corresponding path program 20 times [2020-10-15 19:11:59,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:11:59,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804401135] [2020-10-15 19:11:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:11:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:11:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-15 19:11:59,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804401135] [2020-10-15 19:11:59,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528944362] [2020-10-15 19:11:59,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:11:59,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:11:59,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:11:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 53 conjunts are in the unsatisfiable core [2020-10-15 19:11:59,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:12:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:12:01,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:12:01,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 52] total 66 [2020-10-15 19:12:01,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938252111] [2020-10-15 19:12:01,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-15 19:12:01,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:12:01,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-15 19:12:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2020-10-15 19:12:01,498 INFO L87 Difference]: Start difference. First operand 606 states and 1208 transitions. Second operand 66 states. [2020-10-15 19:14:26,531 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-10-15 19:16:27,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:16:27,654 INFO L93 Difference]: Finished difference Result 30049 states and 60080 transitions. [2020-10-15 19:16:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2384 states. [2020-10-15 19:16:27,656 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 59 [2020-10-15 19:16:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:16:27,772 INFO L225 Difference]: With dead ends: 30049 [2020-10-15 19:16:27,772 INFO L226 Difference]: Without dead ends: 30025 [2020-10-15 19:16:28,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2769 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 2393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796224 ImplicationChecksByTransitivity, 232.9s TimeCoverageRelationStatistics Valid=1405807, Invalid=4327823, Unknown=0, NotChecked=0, Total=5733630 [2020-10-15 19:16:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30025 states. [2020-10-15 19:16:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30025 to 1198. [2020-10-15 19:16:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2020-10-15 19:16:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2520 transitions. [2020-10-15 19:16:28,758 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2520 transitions. Word has length 59 [2020-10-15 19:16:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:16:28,759 INFO L481 AbstractCegarLoop]: Abstraction has 1198 states and 2520 transitions. [2020-10-15 19:16:28,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-15 19:16:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2520 transitions. [2020-10-15 19:16:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-15 19:16:28,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:16:28,762 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:16:28,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-15 19:16:28,977 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:16:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:16:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash -669634640, now seen corresponding path program 21 times [2020-10-15 19:16:28,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:16:28,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662133645] [2020-10-15 19:16:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:16:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:16:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-15 19:16:29,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662133645] [2020-10-15 19:16:29,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633165765] [2020-10-15 19:16:29,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:16:29,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-15 19:16:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:16:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-15 19:16:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:16:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-15 19:16:29,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:16:29,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-15 19:16:29,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587771963] [2020-10-15 19:16:29,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:16:29,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:16:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:16:29,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:16:29,416 INFO L87 Difference]: Start difference. First operand 1198 states and 2520 transitions. Second operand 16 states. [2020-10-15 19:16:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:16:29,547 INFO L93 Difference]: Finished difference Result 1382 states and 2810 transitions. [2020-10-15 19:16:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:16:29,550 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-15 19:16:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:16:29,553 INFO L225 Difference]: With dead ends: 1382 [2020-10-15 19:16:29,554 INFO L226 Difference]: Without dead ends: 1382 [2020-10-15 19:16:29,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:16:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2020-10-15 19:16:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1280. [2020-10-15 19:16:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2020-10-15 19:16:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 2684 transitions. [2020-10-15 19:16:29,576 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 2684 transitions. Word has length 60 [2020-10-15 19:16:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:16:29,576 INFO L481 AbstractCegarLoop]: Abstraction has 1280 states and 2684 transitions. [2020-10-15 19:16:29,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:16:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 2684 transitions. [2020-10-15 19:16:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-15 19:16:29,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:16:29,580 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:16:29,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:16:29,793 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:16:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:16:29,794 INFO L82 PathProgramCache]: Analyzing trace with hash 746529141, now seen corresponding path program 22 times [2020-10-15 19:16:29,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:16:29,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744177138] [2020-10-15 19:16:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:16:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:16:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-15 19:16:30,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744177138] [2020-10-15 19:16:30,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286294308] [2020-10-15 19:16:30,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:16:30,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:16:30,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:16:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2020-10-15 19:16:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:16:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:16:34,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:16:34,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 54] total 70 [2020-10-15 19:16:34,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117287636] [2020-10-15 19:16:34,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-15 19:16:34,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:16:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-15 19:16:34,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2020-10-15 19:16:34,059 INFO L87 Difference]: Start difference. First operand 1280 states and 2684 transitions. Second operand 70 states. [2020-10-15 19:20:04,163 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-10-15 19:23:54,845 WARN L193 SmtUtils]: Spent 852.00 ms on a formula simplification that was a NOOP. DAG size: 10 Received shutdown request... [2020-10-15 19:24:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2521 states. [2020-10-15 19:24:29,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-15 19:24:29,180 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 19:24:29,184 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 19:24:29,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:24:29 BasicIcfg [2020-10-15 19:24:29,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 19:24:29,185 INFO L168 Benchmark]: Toolchain (without parser) took 805407.02 ms. Allocated memory was 251.1 MB in the beginning and 3.4 GB in the end (delta: 3.1 GB). Free memory was 206.3 MB in the beginning and 598.5 MB in the end (delta: -392.2 MB). Peak memory consumption was 2.7 GB. Max. memory is 14.2 GB. [2020-10-15 19:24:29,186 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 19:24:29,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1120.57 ms. Allocated memory was 251.1 MB in the beginning and 315.6 MB in the end (delta: 64.5 MB). Free memory was 206.3 MB in the beginning and 215.8 MB in the end (delta: -9.5 MB). Peak memory consumption was 65.2 MB. Max. memory is 14.2 GB. [2020-10-15 19:24:29,186 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.89 ms. Allocated memory is still 315.6 MB. Free memory was 215.8 MB in the beginning and 213.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 19:24:29,187 INFO L168 Benchmark]: Boogie Preprocessor took 33.60 ms. Allocated memory is still 315.6 MB. Free memory is still 213.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 19:24:29,187 INFO L168 Benchmark]: RCFGBuilder took 525.98 ms. Allocated memory is still 315.6 MB. Free memory was 213.3 MB in the beginning and 186.4 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-15 19:24:29,187 INFO L168 Benchmark]: TraceAbstraction took 803638.14 ms. Allocated memory was 315.6 MB in the beginning and 3.4 GB in the end (delta: 3.1 GB). Free memory was 183.9 MB in the beginning and 598.5 MB in the end (delta: -414.6 MB). Peak memory consumption was 2.7 GB. Max. memory is 14.2 GB. [2020-10-15 19:24:29,189 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 251.1 MB. Free memory is still 227.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 1120.57 ms. Allocated memory was 251.1 MB in the beginning and 315.6 MB in the end (delta: 64.5 MB). Free memory was 206.3 MB in the beginning and 215.8 MB in the end (delta: -9.5 MB). Peak memory consumption was 65.2 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 82.89 ms. Allocated memory is still 315.6 MB. Free memory was 215.8 MB in the beginning and 213.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 33.60 ms. Allocated memory is still 315.6 MB. Free memory is still 213.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 525.98 ms. Allocated memory is still 315.6 MB. Free memory was 213.3 MB in the beginning and 186.4 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 803638.14 ms. Allocated memory was 315.6 MB in the beginning and 3.4 GB in the end (delta: 3.1 GB). Free memory was 183.9 MB in the beginning and 598.5 MB in the end (delta: -414.6 MB). Peak memory consumption was 2.7 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 432 VarBasedMoverChecksPositive, 9 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 12 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 5.3s, 82 PlacesBefore, 15 PlacesAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 6 FixpointIterations, 44 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 83 TotalNumberOfCompositions, 580 MoverChecksTotal - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (1280states) and FLOYD_HOARE automaton (currently 2521 states, 70 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 2562 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 803.5s, OverallIterations: 24, TraceHistogramMax: 20, AutomataDifference: 778.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.3s, HoareTripleCheckerStatistics: 324 SDtfs, 4079 SDslu, 3831 SDs, 0 SdLazy, 6629 SolverSat, 6408 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8343 GetRequests, 2232 SyntacticMatches, 0 SemanticMatches, 6110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8219917 ImplicationChecksByTransitivity, 701.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1280occurred in iteration=23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 23 MinimizatonAttempts, 29098 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 10.3s InterpolantComputationTime, 1674 NumberOfCodeBlocks, 1582 NumberOfCodeBlocksAsserted, 131 NumberOfCheckSat, 1627 ConstructedInterpolants, 0 QuantifiedInterpolants, 159451 SizeOfPredicates, 101 NumberOfNonLiveVariables, 4363 ConjunctsInSsa, 310 ConjunctsInUnsatCore, 47 InterpolantComputations, 2 PerfectInterpolantSequences, 3562/8738 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