/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 13:51:35,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 13:51:35,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 13:51:35,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 13:51:35,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 13:51:35,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 13:51:35,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 13:51:35,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 13:51:35,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 13:51:35,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 13:51:35,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 13:51:35,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 13:51:35,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 13:51:35,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 13:51:35,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 13:51:35,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 13:51:35,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 13:51:35,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 13:51:35,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 13:51:35,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 13:51:35,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 13:51:35,771 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 13:51:35,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 13:51:35,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 13:51:35,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 13:51:35,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 13:51:35,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 13:51:35,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 13:51:35,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 13:51:35,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 13:51:35,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 13:51:35,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 13:51:35,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 13:51:35,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 13:51:35,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 13:51:35,802 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 13:51:35,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 13:51:35,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 13:51:35,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 13:51:35,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 13:51:35,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 13:51:35,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 13:51:35,838 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 13:51:35,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 13:51:35,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 13:51:35,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 13:51:35,841 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 13:51:35,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 13:51:35,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 13:51:35,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 13:51:35,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 13:51:35,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 13:51:35,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 13:51:35,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 13:51:35,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 13:51:35,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 13:51:35,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 13:51:35,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 13:51:35,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 13:51:35,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 13:51:35,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 13:51:35,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 13:51:35,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 13:51:35,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 13:51:35,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 13:51:35,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 13:51:35,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 13:51:35,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 13:51:36,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 13:51:36,246 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 13:51:36,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 13:51:36,251 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 13:51:36,259 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 13:51:36,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2020-12-23 13:51:36,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9a84737c9/68abfd22d8fd4bd08f42a24623826b04/FLAG1b2b72b4a [2020-12-23 13:51:37,141 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 13:51:37,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i [2020-12-23 13:51:37,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9a84737c9/68abfd22d8fd4bd08f42a24623826b04/FLAG1b2b72b4a [2020-12-23 13:51:37,394 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9a84737c9/68abfd22d8fd4bd08f42a24623826b04 [2020-12-23 13:51:37,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 13:51:37,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 13:51:37,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 13:51:37,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 13:51:37,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 13:51:37,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:51:37" (1/1) ... [2020-12-23 13:51:37,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d900aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:37, skipping insertion in model container [2020-12-23 13:51:37,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:51:37" (1/1) ... [2020-12-23 13:51:37,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 13:51:37,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 13:51:37,724 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~myglobal~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~myglobal~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~myglobal~0,GLOBAL] [2020-12-23 13:51:38,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:51:38,461 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 13:51:38,478 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~myglobal~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~myglobal~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~myglobal~0,GLOBAL] [2020-12-23 13:51:38,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:51:38,844 INFO L208 MainTranslator]: Completed translation [2020-12-23 13:51:38,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38 WrapperNode [2020-12-23 13:51:38,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 13:51:38,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 13:51:38,846 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 13:51:38,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 13:51:38,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:38,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:38,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 13:51:38,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 13:51:38,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 13:51:38,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 13:51:38,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:38,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:38,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:38,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:38,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:38,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:38,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... [2020-12-23 13:51:39,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 13:51:39,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 13:51:39,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 13:51:39,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 13:51:39,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:39,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 13:51:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 13:51:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 13:51:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 13:51:39,098 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2020-12-23 13:51:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2020-12-23 13:51:39,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2020-12-23 13:51:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 13:51:39,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 13:51:39,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 13:51:39,101 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-23 13:51:39,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 13:51:39,620 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 13:51:39,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:51:39 BoogieIcfgContainer [2020-12-23 13:51:39,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 13:51:39,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 13:51:39,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 13:51:39,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 13:51:39,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:51:37" (1/3) ... [2020-12-23 13:51:39,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562a4b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:51:39, skipping insertion in model container [2020-12-23 13:51:39,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:51:38" (2/3) ... [2020-12-23 13:51:39,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@562a4b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:51:39, skipping insertion in model container [2020-12-23 13:51:39,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:51:39" (3/3) ... [2020-12-23 13:51:39,632 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2020-12-23 13:51:39,640 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-23 13:51:39,640 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 13:51:39,645 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 13:51:39,646 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-23 13:51:39,677 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,678 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,678 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,678 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,678 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,678 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,679 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,679 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,679 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,679 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,680 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,680 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,680 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,680 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,680 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,681 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,681 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,681 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,681 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,682 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,682 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,682 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,682 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,682 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,683 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,683 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,683 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,683 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,684 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,684 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,684 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,684 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,685 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,685 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,685 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,685 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,686 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,686 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,686 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,686 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,686 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,686 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,687 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,687 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,687 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,687 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,690 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,690 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,690 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,691 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,691 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,691 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet35| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,691 WARN L313 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,691 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,692 WARN L313 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:51:39,699 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-12-23 13:51:39,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 13:51:39,745 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 13:51:39,745 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 13:51:39,745 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 13:51:39,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 13:51:39,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 13:51:39,746 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 13:51:39,746 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 13:51:39,746 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 13:51:39,760 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-23 13:51:39,763 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 86 transitions, 180 flow [2020-12-23 13:51:39,766 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 86 transitions, 180 flow [2020-12-23 13:51:39,769 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 83 places, 86 transitions, 180 flow [2020-12-23 13:51:39,820 INFO L129 PetriNetUnfolder]: 7/85 cut-off events. [2020-12-23 13:51:39,821 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-12-23 13:51:39,825 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 7/85 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 82 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-12-23 13:51:39,828 INFO L116 LiptonReduction]: Number of co-enabled transitions 646 [2020-12-23 13:51:43,057 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-12-23 13:51:43,266 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-23 13:51:43,539 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-12-23 13:51:43,783 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-12-23 13:51:44,853 WARN L197 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-23 13:51:45,192 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-12-23 13:51:45,887 WARN L197 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-23 13:51:46,220 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-12-23 13:51:47,381 WARN L197 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2020-12-23 13:51:47,946 WARN L197 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-12-23 13:51:49,137 WARN L197 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2020-12-23 13:51:49,706 WARN L197 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-12-23 13:51:49,710 INFO L131 LiptonReduction]: Checked pairs total: 844 [2020-12-23 13:51:49,711 INFO L133 LiptonReduction]: Total number of compositions: 80 [2020-12-23 13:51:49,718 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 17 transitions, 42 flow [2020-12-23 13:51:49,726 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2020-12-23 13:51:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-23 13:51:49,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:51:49,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:49,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:49,735 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1821882628, now seen corresponding path program 1 times [2020-12-23 13:51:49,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:49,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642766253] [2020-12-23 13:51:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:51:49,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642766253] [2020-12-23 13:51:49,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:51:49,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:51:49,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086114626] [2020-12-23 13:51:49,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 13:51:49,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:50,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 13:51:50,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 13:51:50,017 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-12-23 13:51:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:50,070 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-12-23 13:51:50,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 13:51:50,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 13:51:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:50,086 INFO L225 Difference]: With dead ends: 54 [2020-12-23 13:51:50,087 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 13:51:50,088 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 [2020-12-23 13:51:50,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 13:51:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2020-12-23 13:51:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 13:51:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-12-23 13:51:50,133 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 8 [2020-12-23 13:51:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:50,133 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-12-23 13:51:50,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 13:51:50,134 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-12-23 13:51:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:51:50,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:50,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:50,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 13:51:50,136 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:50,137 INFO L82 PathProgramCache]: Analyzing trace with hash 431550250, now seen corresponding path program 1 times [2020-12-23 13:51:50,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:50,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019200053] [2020-12-23 13:51:50,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:51:50,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019200053] [2020-12-23 13:51:50,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:51:50,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:51:50,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948050169] [2020-12-23 13:51:50,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 13:51:50,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:50,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 13:51:50,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 13:51:50,225 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 3 states. [2020-12-23 13:51:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:50,255 INFO L93 Difference]: Finished difference Result 60 states and 116 transitions. [2020-12-23 13:51:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 13:51:50,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-23 13:51:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:50,259 INFO L225 Difference]: With dead ends: 60 [2020-12-23 13:51:50,260 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 13:51:50,261 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 [2020-12-23 13:51:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 13:51:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-12-23 13:51:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 13:51:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2020-12-23 13:51:50,279 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 12 [2020-12-23 13:51:50,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:50,279 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2020-12-23 13:51:50,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 13:51:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2020-12-23 13:51:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:51:50,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:50,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:50,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 13:51:50,282 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash -6787102, now seen corresponding path program 1 times [2020-12-23 13:51:50,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:50,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804512739] [2020-12-23 13:51:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:51:50,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804512739] [2020-12-23 13:51:50,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536917190] [2020-12-23 13:51:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:50,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 13:51:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:51:50,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:50,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 13:51:50,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274452840] [2020-12-23 13:51:50,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:51:50,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:50,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:51:50,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:51:50,540 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 5 states. [2020-12-23 13:51:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:50,592 INFO L93 Difference]: Finished difference Result 81 states and 158 transitions. [2020-12-23 13:51:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 13:51:50,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 13:51:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:50,594 INFO L225 Difference]: With dead ends: 81 [2020-12-23 13:51:50,594 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 13:51:50,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:51:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 13:51:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2020-12-23 13:51:50,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 13:51:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2020-12-23 13:51:50,610 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2020-12-23 13:51:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:50,610 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2020-12-23 13:51:50,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:51:50,611 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2020-12-23 13:51:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:51:50,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:50,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:50,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 13:51:50,831 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:50,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1814260694, now seen corresponding path program 2 times [2020-12-23 13:51:50,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:50,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355427197] [2020-12-23 13:51:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 13:51:50,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355427197] [2020-12-23 13:51:50,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467785076] [2020-12-23 13:51:50,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:51,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:51:51,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:51,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 13:51:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:51:51,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:51,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-23 13:51:51,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617911996] [2020-12-23 13:51:51,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 13:51:51,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:51,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 13:51:51,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 13:51:51,104 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand 7 states. [2020-12-23 13:51:51,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:51,304 INFO L93 Difference]: Finished difference Result 200 states and 396 transitions. [2020-12-23 13:51:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:51:51,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 13:51:51,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:51,312 INFO L225 Difference]: With dead ends: 200 [2020-12-23 13:51:51,312 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 13:51:51,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:51:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 13:51:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 136. [2020-12-23 13:51:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:51:51,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 268 transitions. [2020-12-23 13:51:51,351 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 268 transitions. Word has length 18 [2020-12-23 13:51:51,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:51,352 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 268 transitions. [2020-12-23 13:51:51,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 13:51:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 268 transitions. [2020-12-23 13:51:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 13:51:51,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:51,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:51,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:51:51,572 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash 148664778, now seen corresponding path program 3 times [2020-12-23 13:51:51,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:51,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957323888] [2020-12-23 13:51:51,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 13:51:51,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957323888] [2020-12-23 13:51:51,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937850581] [2020-12-23 13:51:51,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:51,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:51:51,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:51,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 13:51:51,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 13:51:51,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:51,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-23 13:51:51,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160748457] [2020-12-23 13:51:51,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:51:51,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:51,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:51:51,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:51:51,880 INFO L87 Difference]: Start difference. First operand 136 states and 268 transitions. Second operand 9 states. [2020-12-23 13:51:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:52,140 INFO L93 Difference]: Finished difference Result 310 states and 616 transitions. [2020-12-23 13:51:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:51:52,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-12-23 13:51:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:52,143 INFO L225 Difference]: With dead ends: 310 [2020-12-23 13:51:52,143 INFO L226 Difference]: Without dead ends: 310 [2020-12-23 13:51:52,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:51:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-23 13:51:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 229. [2020-12-23 13:51:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-23 13:51:52,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 454 transitions. [2020-12-23 13:51:52,160 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 454 transitions. Word has length 25 [2020-12-23 13:51:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:52,161 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 454 transitions. [2020-12-23 13:51:52,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:51:52,161 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 454 transitions. [2020-12-23 13:51:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 13:51:52,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:52,165 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:52,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:51:52,381 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:52,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1316981498, now seen corresponding path program 4 times [2020-12-23 13:51:52,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:52,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462327952] [2020-12-23 13:51:52,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:52,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462327952] [2020-12-23 13:51:52,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090698020] [2020-12-23 13:51:52,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:52,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:51:52,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:52,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 13:51:52,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:52,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:52,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 13:51:52,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015279571] [2020-12-23 13:51:52,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:51:52,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:52,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:51:52,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:51:52,595 INFO L87 Difference]: Start difference. First operand 229 states and 454 transitions. Second operand 8 states. [2020-12-23 13:51:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:52,671 INFO L93 Difference]: Finished difference Result 304 states and 604 transitions. [2020-12-23 13:51:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:51:52,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-23 13:51:52,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:52,674 INFO L225 Difference]: With dead ends: 304 [2020-12-23 13:51:52,675 INFO L226 Difference]: Without dead ends: 304 [2020-12-23 13:51:52,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:51:52,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-12-23 13:51:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 274. [2020-12-23 13:51:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-12-23 13:51:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 544 transitions. [2020-12-23 13:51:52,703 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 544 transitions. Word has length 32 [2020-12-23 13:51:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:52,704 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 544 transitions. [2020-12-23 13:51:52,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:51:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 544 transitions. [2020-12-23 13:51:52,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 13:51:52,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:52,713 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:52,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:51:52,927 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:52,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash 395280306, now seen corresponding path program 5 times [2020-12-23 13:51:52,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:52,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203518619] [2020-12-23 13:51:52,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:53,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203518619] [2020-12-23 13:51:53,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274716289] [2020-12-23 13:51:53,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:53,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 13:51:53,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 13:51:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:53,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:53,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 13:51:53,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238453493] [2020-12-23 13:51:53,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:51:53,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:51:53,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:51:53,309 INFO L87 Difference]: Start difference. First operand 274 states and 544 transitions. Second operand 9 states. [2020-12-23 13:51:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:53,366 INFO L93 Difference]: Finished difference Result 349 states and 694 transitions. [2020-12-23 13:51:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:51:53,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-12-23 13:51:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:53,369 INFO L225 Difference]: With dead ends: 349 [2020-12-23 13:51:53,370 INFO L226 Difference]: Without dead ends: 349 [2020-12-23 13:51:53,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:51:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-23 13:51:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 319. [2020-12-23 13:51:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-12-23 13:51:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 634 transitions. [2020-12-23 13:51:53,383 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 634 transitions. Word has length 35 [2020-12-23 13:51:53,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:53,383 INFO L481 AbstractCegarLoop]: Abstraction has 319 states and 634 transitions. [2020-12-23 13:51:53,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:51:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 634 transitions. [2020-12-23 13:51:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 13:51:53,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:53,388 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:53,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-23 13:51:53,603 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:53,604 INFO L82 PathProgramCache]: Analyzing trace with hash -279007238, now seen corresponding path program 6 times [2020-12-23 13:51:53,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:53,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345810445] [2020-12-23 13:51:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:53,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345810445] [2020-12-23 13:51:53,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625670514] [2020-12-23 13:51:53,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:53,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 13:51:53,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:53,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 13:51:53,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:53,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:53,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 13:51:53,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994491877] [2020-12-23 13:51:53,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:51:53,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:51:53,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:51:53,936 INFO L87 Difference]: Start difference. First operand 319 states and 634 transitions. Second operand 10 states. [2020-12-23 13:51:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:54,033 INFO L93 Difference]: Finished difference Result 394 states and 784 transitions. [2020-12-23 13:51:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:51:54,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-12-23 13:51:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:54,036 INFO L225 Difference]: With dead ends: 394 [2020-12-23 13:51:54,037 INFO L226 Difference]: Without dead ends: 394 [2020-12-23 13:51:54,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:51:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-23 13:51:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 364. [2020-12-23 13:51:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2020-12-23 13:51:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 724 transitions. [2020-12-23 13:51:54,048 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 724 transitions. Word has length 38 [2020-12-23 13:51:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:54,049 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 724 transitions. [2020-12-23 13:51:54,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:51:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 724 transitions. [2020-12-23 13:51:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 13:51:54,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:54,051 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:54,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:51:54,266 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:54,267 INFO L82 PathProgramCache]: Analyzing trace with hash -417187150, now seen corresponding path program 7 times [2020-12-23 13:51:54,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:54,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738168398] [2020-12-23 13:51:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:54,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738168398] [2020-12-23 13:51:54,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441741493] [2020-12-23 13:51:54,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:54,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:51:54,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:54,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:54,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:51:54,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956298947] [2020-12-23 13:51:54,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:51:54,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:51:54,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:51:54,532 INFO L87 Difference]: Start difference. First operand 364 states and 724 transitions. Second operand 11 states. [2020-12-23 13:51:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:54,638 INFO L93 Difference]: Finished difference Result 439 states and 874 transitions. [2020-12-23 13:51:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:51:54,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-12-23 13:51:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:54,641 INFO L225 Difference]: With dead ends: 439 [2020-12-23 13:51:54,642 INFO L226 Difference]: Without dead ends: 439 [2020-12-23 13:51:54,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:51:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2020-12-23 13:51:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 409. [2020-12-23 13:51:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2020-12-23 13:51:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 814 transitions. [2020-12-23 13:51:54,656 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 814 transitions. Word has length 41 [2020-12-23 13:51:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:54,656 INFO L481 AbstractCegarLoop]: Abstraction has 409 states and 814 transitions. [2020-12-23 13:51:54,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:51:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 814 transitions. [2020-12-23 13:51:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 13:51:54,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:54,658 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:54,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:51:54,872 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1938691322, now seen corresponding path program 8 times [2020-12-23 13:51:54,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:54,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783561782] [2020-12-23 13:51:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:55,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783561782] [2020-12-23 13:51:55,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303456827] [2020-12-23 13:51:55,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:55,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:51:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:55,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:51:55,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:55,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:55,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 13:51:55,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023692101] [2020-12-23 13:51:55,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:51:55,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:55,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:51:55,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:51:55,223 INFO L87 Difference]: Start difference. First operand 409 states and 814 transitions. Second operand 12 states. [2020-12-23 13:51:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:55,319 INFO L93 Difference]: Finished difference Result 484 states and 964 transitions. [2020-12-23 13:51:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:51:55,320 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-12-23 13:51:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:55,324 INFO L225 Difference]: With dead ends: 484 [2020-12-23 13:51:55,324 INFO L226 Difference]: Without dead ends: 484 [2020-12-23 13:51:55,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:51:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-23 13:51:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 454. [2020-12-23 13:51:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-12-23 13:51:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 904 transitions. [2020-12-23 13:51:55,339 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 904 transitions. Word has length 44 [2020-12-23 13:51:55,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:55,341 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 904 transitions. [2020-12-23 13:51:55,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:51:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 904 transitions. [2020-12-23 13:51:55,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 13:51:55,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:55,343 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:55,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 13:51:55,557 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:55,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1853666738, now seen corresponding path program 9 times [2020-12-23 13:51:55,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:55,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590783538] [2020-12-23 13:51:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 13:51:55,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590783538] [2020-12-23 13:51:55,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462181083] [2020-12-23 13:51:55,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:55,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:51:55,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:55,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 13:51:55,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:55,886 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-12-23 13:51:55,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:55,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2020-12-23 13:51:55,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835330844] [2020-12-23 13:51:55,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:51:55,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:51:55,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:51:55,889 INFO L87 Difference]: Start difference. First operand 454 states and 904 transitions. Second operand 16 states. [2020-12-23 13:51:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:56,856 INFO L93 Difference]: Finished difference Result 774 states and 1544 transitions. [2020-12-23 13:51:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 13:51:56,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-12-23 13:51:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:56,862 INFO L225 Difference]: With dead ends: 774 [2020-12-23 13:51:56,863 INFO L226 Difference]: Without dead ends: 774 [2020-12-23 13:51:56,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=990, Invalid=2090, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 13:51:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-12-23 13:51:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 631. [2020-12-23 13:51:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 631 states. [2020-12-23 13:51:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1258 transitions. [2020-12-23 13:51:56,884 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1258 transitions. Word has length 47 [2020-12-23 13:51:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:56,885 INFO L481 AbstractCegarLoop]: Abstraction has 631 states and 1258 transitions. [2020-12-23 13:51:56,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:51:56,885 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1258 transitions. [2020-12-23 13:51:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 13:51:56,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:56,887 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:57,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:51:57,101 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1772735262, now seen corresponding path program 10 times [2020-12-23 13:51:57,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:57,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984209988] [2020-12-23 13:51:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 13:51:57,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984209988] [2020-12-23 13:51:57,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099773711] [2020-12-23 13:51:57,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:57,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:51:57,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:57,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:51:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 13:51:57,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:57,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 13:51:57,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712129375] [2020-12-23 13:51:57,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:51:57,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:51:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:51:57,513 INFO L87 Difference]: Start difference. First operand 631 states and 1258 transitions. Second operand 14 states. [2020-12-23 13:51:57,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:57,655 INFO L93 Difference]: Finished difference Result 726 states and 1448 transitions. [2020-12-23 13:51:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:51:57,659 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-12-23 13:51:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:57,663 INFO L225 Difference]: With dead ends: 726 [2020-12-23 13:51:57,664 INFO L226 Difference]: Without dead ends: 726 [2020-12-23 13:51:57,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:51:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2020-12-23 13:51:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 688. [2020-12-23 13:51:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2020-12-23 13:51:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1372 transitions. [2020-12-23 13:51:57,685 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1372 transitions. Word has length 54 [2020-12-23 13:51:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:57,685 INFO L481 AbstractCegarLoop]: Abstraction has 688 states and 1372 transitions. [2020-12-23 13:51:57,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:51:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1372 transitions. [2020-12-23 13:51:57,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 13:51:57,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:57,687 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:57,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:51:57,902 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:57,903 INFO L82 PathProgramCache]: Analyzing trace with hash 870141850, now seen corresponding path program 11 times [2020-12-23 13:51:57,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:57,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20793866] [2020-12-23 13:51:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 13:51:58,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20793866] [2020-12-23 13:51:58,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102943795] [2020-12-23 13:51:58,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:58,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 13:51:58,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:58,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:51:58,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 13:51:58,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:58,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 13:51:58,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388260942] [2020-12-23 13:51:58,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:51:58,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:51:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:51:58,324 INFO L87 Difference]: Start difference. First operand 688 states and 1372 transitions. Second operand 15 states. [2020-12-23 13:51:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:51:58,490 INFO L93 Difference]: Finished difference Result 783 states and 1562 transitions. [2020-12-23 13:51:58,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:51:58,491 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-12-23 13:51:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:51:58,497 INFO L225 Difference]: With dead ends: 783 [2020-12-23 13:51:58,498 INFO L226 Difference]: Without dead ends: 783 [2020-12-23 13:51:58,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:51:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-12-23 13:51:58,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 745. [2020-12-23 13:51:58,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-12-23 13:51:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1486 transitions. [2020-12-23 13:51:58,522 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1486 transitions. Word has length 57 [2020-12-23 13:51:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:51:58,523 INFO L481 AbstractCegarLoop]: Abstraction has 745 states and 1486 transitions. [2020-12-23 13:51:58,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:51:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1486 transitions. [2020-12-23 13:51:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 13:51:58,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:51:58,526 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:51:58,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 13:51:58,740 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:51:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:51:58,741 INFO L82 PathProgramCache]: Analyzing trace with hash -518284830, now seen corresponding path program 12 times [2020-12-23 13:51:58,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:51:58,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65130704] [2020-12-23 13:51:58,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:51:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:51:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 13:51:58,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65130704] [2020-12-23 13:51:58,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166570931] [2020-12-23 13:51:58,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:51:59,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 13:51:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:51:59,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 13:51:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:51:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-12-23 13:51:59,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:51:59,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2020-12-23 13:51:59,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416167497] [2020-12-23 13:51:59,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:51:59,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:51:59,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:51:59,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:51:59,289 INFO L87 Difference]: Start difference. First operand 745 states and 1486 transitions. Second operand 20 states. [2020-12-23 13:52:01,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:01,117 INFO L93 Difference]: Finished difference Result 1148 states and 2292 transitions. [2020-12-23 13:52:01,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 13:52:01,118 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-12-23 13:52:01,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:01,125 INFO L225 Difference]: With dead ends: 1148 [2020-12-23 13:52:01,126 INFO L226 Difference]: Without dead ends: 1148 [2020-12-23 13:52:01,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2205, Invalid=4935, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 13:52:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2020-12-23 13:52:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 970. [2020-12-23 13:52:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 970 states. [2020-12-23 13:52:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 1936 transitions. [2020-12-23 13:52:01,166 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 1936 transitions. Word has length 60 [2020-12-23 13:52:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:01,167 INFO L481 AbstractCegarLoop]: Abstraction has 970 states and 1936 transitions. [2020-12-23 13:52:01,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:52:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 1936 transitions. [2020-12-23 13:52:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 13:52:01,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:01,171 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:01,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 13:52:01,386 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 362870146, now seen corresponding path program 13 times [2020-12-23 13:52:01,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:01,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849033844] [2020-12-23 13:52:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 13:52:01,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849033844] [2020-12-23 13:52:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110543748] [2020-12-23 13:52:01,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:52:01,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 13:52:01,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:01,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 13:52:01,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726946545] [2020-12-23 13:52:01,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:52:01,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:01,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:52:01,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:52:01,840 INFO L87 Difference]: Start difference. First operand 970 states and 1936 transitions. Second operand 17 states. [2020-12-23 13:52:02,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:02,010 INFO L93 Difference]: Finished difference Result 1085 states and 2166 transitions. [2020-12-23 13:52:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:52:02,011 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-12-23 13:52:02,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:02,018 INFO L225 Difference]: With dead ends: 1085 [2020-12-23 13:52:02,018 INFO L226 Difference]: Without dead ends: 1085 [2020-12-23 13:52:02,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:52:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2020-12-23 13:52:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1039. [2020-12-23 13:52:02,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2020-12-23 13:52:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2074 transitions. [2020-12-23 13:52:02,045 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2074 transitions. Word has length 67 [2020-12-23 13:52:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:02,046 INFO L481 AbstractCegarLoop]: Abstraction has 1039 states and 2074 transitions. [2020-12-23 13:52:02,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:52:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2074 transitions. [2020-12-23 13:52:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 13:52:02,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:02,049 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:02,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 13:52:02,263 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:02,264 INFO L82 PathProgramCache]: Analyzing trace with hash -916650550, now seen corresponding path program 14 times [2020-12-23 13:52:02,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:02,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137309999] [2020-12-23 13:52:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 13:52:02,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137309999] [2020-12-23 13:52:02,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463298154] [2020-12-23 13:52:02,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:02,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:52:02,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:02,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:52:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 13:52:02,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:02,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:52:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168717765] [2020-12-23 13:52:02,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:52:02,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:52:02,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:52:02,684 INFO L87 Difference]: Start difference. First operand 1039 states and 2074 transitions. Second operand 18 states. [2020-12-23 13:52:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:02,780 INFO L93 Difference]: Finished difference Result 1154 states and 2304 transitions. [2020-12-23 13:52:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:52:02,781 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-12-23 13:52:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:02,786 INFO L225 Difference]: With dead ends: 1154 [2020-12-23 13:52:02,787 INFO L226 Difference]: Without dead ends: 1154 [2020-12-23 13:52:02,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:52:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2020-12-23 13:52:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1108. [2020-12-23 13:52:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2020-12-23 13:52:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 2212 transitions. [2020-12-23 13:52:02,820 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 2212 transitions. Word has length 70 [2020-12-23 13:52:02,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:02,820 INFO L481 AbstractCegarLoop]: Abstraction has 1108 states and 2212 transitions. [2020-12-23 13:52:02,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:52:02,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 2212 transitions. [2020-12-23 13:52:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 13:52:02,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:02,831 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:03,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:03,046 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1282953086, now seen corresponding path program 15 times [2020-12-23 13:52:03,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:03,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522912261] [2020-12-23 13:52:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 13:52:03,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522912261] [2020-12-23 13:52:03,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104787579] [2020-12-23 13:52:03,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:03,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 13:52:03,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:03,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 13:52:03,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-23 13:52:03,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:03,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2020-12-23 13:52:03,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582638685] [2020-12-23 13:52:03,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 13:52:03,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:03,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 13:52:03,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:52:03,607 INFO L87 Difference]: Start difference. First operand 1108 states and 2212 transitions. Second operand 24 states. [2020-12-23 13:52:06,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:06,937 INFO L93 Difference]: Finished difference Result 1594 states and 3184 transitions. [2020-12-23 13:52:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-12-23 13:52:06,943 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2020-12-23 13:52:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:06,951 INFO L225 Difference]: With dead ends: 1594 [2020-12-23 13:52:06,951 INFO L226 Difference]: Without dead ends: 1594 [2020-12-23 13:52:06,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4650 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4284, Invalid=9996, Unknown=0, NotChecked=0, Total=14280 [2020-12-23 13:52:06,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-23 13:52:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1381. [2020-12-23 13:52:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1381 states. [2020-12-23 13:52:06,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2758 transitions. [2020-12-23 13:52:06,997 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2758 transitions. Word has length 73 [2020-12-23 13:52:06,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:06,997 INFO L481 AbstractCegarLoop]: Abstraction has 1381 states and 2758 transitions. [2020-12-23 13:52:06,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 13:52:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2758 transitions. [2020-12-23 13:52:07,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 13:52:07,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:07,002 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:07,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 13:52:07,216 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1781793358, now seen corresponding path program 16 times [2020-12-23 13:52:07,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:07,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663887701] [2020-12-23 13:52:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 13:52:07,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663887701] [2020-12-23 13:52:07,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244716920] [2020-12-23 13:52:07,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:07,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:52:07,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:07,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 13:52:07,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 13:52:07,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:07,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:52:07,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962473572] [2020-12-23 13:52:07,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:52:07,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:07,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:52:07,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:52:07,851 INFO L87 Difference]: Start difference. First operand 1381 states and 2758 transitions. Second operand 20 states. [2020-12-23 13:52:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:08,021 INFO L93 Difference]: Finished difference Result 1516 states and 3028 transitions. [2020-12-23 13:52:08,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:52:08,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-12-23 13:52:08,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:08,027 INFO L225 Difference]: With dead ends: 1516 [2020-12-23 13:52:08,028 INFO L226 Difference]: Without dead ends: 1516 [2020-12-23 13:52:08,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:52:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2020-12-23 13:52:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1462. [2020-12-23 13:52:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1462 states. [2020-12-23 13:52:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2920 transitions. [2020-12-23 13:52:08,063 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2920 transitions. Word has length 80 [2020-12-23 13:52:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:08,063 INFO L481 AbstractCegarLoop]: Abstraction has 1462 states and 2920 transitions. [2020-12-23 13:52:08,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:52:08,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2920 transitions. [2020-12-23 13:52:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 13:52:08,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:08,068 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:08,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 13:52:08,281 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash 915055210, now seen corresponding path program 17 times [2020-12-23 13:52:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:08,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820992088] [2020-12-23 13:52:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 13:52:08,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820992088] [2020-12-23 13:52:08,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362017840] [2020-12-23 13:52:08,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:08,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 13:52:08,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:52:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 13:52:08,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:08,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:52:08,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395735393] [2020-12-23 13:52:08,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:52:08,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:52:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:52:08,831 INFO L87 Difference]: Start difference. First operand 1462 states and 2920 transitions. Second operand 21 states. [2020-12-23 13:52:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:09,004 INFO L93 Difference]: Finished difference Result 1597 states and 3190 transitions. [2020-12-23 13:52:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:52:09,005 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2020-12-23 13:52:09,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:09,013 INFO L225 Difference]: With dead ends: 1597 [2020-12-23 13:52:09,013 INFO L226 Difference]: Without dead ends: 1597 [2020-12-23 13:52:09,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:52:09,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2020-12-23 13:52:09,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1543. [2020-12-23 13:52:09,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2020-12-23 13:52:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 3082 transitions. [2020-12-23 13:52:09,048 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 3082 transitions. Word has length 83 [2020-12-23 13:52:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:09,049 INFO L481 AbstractCegarLoop]: Abstraction has 1543 states and 3082 transitions. [2020-12-23 13:52:09,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:52:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 3082 transitions. [2020-12-23 13:52:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 13:52:09,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:09,053 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:09,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:09,269 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1072505522, now seen corresponding path program 18 times [2020-12-23 13:52:09,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:09,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863418114] [2020-12-23 13:52:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 13:52:09,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863418114] [2020-12-23 13:52:09,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631083539] [2020-12-23 13:52:09,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:09,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 13:52:09,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 13:52:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-23 13:52:10,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:10,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2020-12-23 13:52:10,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290277587] [2020-12-23 13:52:10,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 13:52:10,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:10,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 13:52:10,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:52:10,155 INFO L87 Difference]: Start difference. First operand 1543 states and 3082 transitions. Second operand 28 states. [2020-12-23 13:52:15,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:15,797 INFO L93 Difference]: Finished difference Result 2112 states and 4220 transitions. [2020-12-23 13:52:15,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2020-12-23 13:52:15,798 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-12-23 13:52:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:15,805 INFO L225 Difference]: With dead ends: 2112 [2020-12-23 13:52:15,805 INFO L226 Difference]: Without dead ends: 2112 [2020-12-23 13:52:15,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8904 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=7560, Invalid=18200, Unknown=0, NotChecked=0, Total=25760 [2020-12-23 13:52:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2020-12-23 13:52:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1864. [2020-12-23 13:52:15,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1864 states. [2020-12-23 13:52:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 3724 transitions. [2020-12-23 13:52:15,854 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 3724 transitions. Word has length 86 [2020-12-23 13:52:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:15,854 INFO L481 AbstractCegarLoop]: Abstraction has 1864 states and 3724 transitions. [2020-12-23 13:52:15,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 13:52:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 3724 transitions. [2020-12-23 13:52:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 13:52:15,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:15,859 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:16,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:16,072 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash 515154002, now seen corresponding path program 19 times [2020-12-23 13:52:16,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:16,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740820735] [2020-12-23 13:52:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 13:52:16,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740820735] [2020-12-23 13:52:16,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813911561] [2020-12-23 13:52:16,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:16,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:52:16,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 13:52:16,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:16,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 13:52:16,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65061892] [2020-12-23 13:52:16,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:52:16,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:16,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:52:16,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:52:16,640 INFO L87 Difference]: Start difference. First operand 1864 states and 3724 transitions. Second operand 23 states. [2020-12-23 13:52:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:16,834 INFO L93 Difference]: Finished difference Result 1957 states and 3910 transitions. [2020-12-23 13:52:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:52:16,835 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2020-12-23 13:52:16,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:16,842 INFO L225 Difference]: With dead ends: 1957 [2020-12-23 13:52:16,842 INFO L226 Difference]: Without dead ends: 1957 [2020-12-23 13:52:16,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:52:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2020-12-23 13:52:16,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1957. [2020-12-23 13:52:16,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1957 states. [2020-12-23 13:52:16,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3910 transitions. [2020-12-23 13:52:16,881 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3910 transitions. Word has length 93 [2020-12-23 13:52:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:16,882 INFO L481 AbstractCegarLoop]: Abstraction has 1957 states and 3910 transitions. [2020-12-23 13:52:16,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:52:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3910 transitions. [2020-12-23 13:52:16,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 13:52:16,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:16,888 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:17,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:17,102 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:17,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:17,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1891015014, now seen corresponding path program 20 times [2020-12-23 13:52:17,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:17,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817300295] [2020-12-23 13:52:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:17,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817300295] [2020-12-23 13:52:17,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122606667] [2020-12-23 13:52:17,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:17,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:52:17,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:17,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:52:17,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:17,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:17,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:52:17,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665785966] [2020-12-23 13:52:17,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:52:17,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:52:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:52:17,483 INFO L87 Difference]: Start difference. First operand 1957 states and 3910 transitions. Second operand 11 states. [2020-12-23 13:52:17,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:17,526 INFO L93 Difference]: Finished difference Result 2398 states and 4792 transitions. [2020-12-23 13:52:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:52:17,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-12-23 13:52:17,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:17,536 INFO L225 Difference]: With dead ends: 2398 [2020-12-23 13:52:17,536 INFO L226 Difference]: Without dead ends: 2398 [2020-12-23 13:52:17,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:52:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2020-12-23 13:52:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 2209. [2020-12-23 13:52:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2209 states. [2020-12-23 13:52:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 4414 transitions. [2020-12-23 13:52:17,574 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 4414 transitions. Word has length 96 [2020-12-23 13:52:17,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:17,574 INFO L481 AbstractCegarLoop]: Abstraction has 2209 states and 4414 transitions. [2020-12-23 13:52:17,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:52:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 4414 transitions. [2020-12-23 13:52:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 13:52:17,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:17,581 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:17,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 13:52:17,796 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:17,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1255838082, now seen corresponding path program 21 times [2020-12-23 13:52:17,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:17,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171340864] [2020-12-23 13:52:17,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:17,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171340864] [2020-12-23 13:52:17,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045246598] [2020-12-23 13:52:17,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:18,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-23 13:52:18,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:18,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:52:18,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 710 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:18,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:18,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 13:52:18,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476196131] [2020-12-23 13:52:18,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:52:18,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:52:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:52:18,326 INFO L87 Difference]: Start difference. First operand 2209 states and 4414 transitions. Second operand 12 states. [2020-12-23 13:52:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:18,373 INFO L93 Difference]: Finished difference Result 2650 states and 5296 transitions. [2020-12-23 13:52:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:52:18,374 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-12-23 13:52:18,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:18,386 INFO L225 Difference]: With dead ends: 2650 [2020-12-23 13:52:18,387 INFO L226 Difference]: Without dead ends: 2650 [2020-12-23 13:52:18,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:52:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2020-12-23 13:52:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2461. [2020-12-23 13:52:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2461 states. [2020-12-23 13:52:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 4918 transitions. [2020-12-23 13:52:18,434 INFO L78 Accepts]: Start accepts. Automaton has 2461 states and 4918 transitions. Word has length 100 [2020-12-23 13:52:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:18,435 INFO L481 AbstractCegarLoop]: Abstraction has 2461 states and 4918 transitions. [2020-12-23 13:52:18,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:52:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2461 states and 4918 transitions. [2020-12-23 13:52:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 13:52:18,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:18,442 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:18,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 13:52:18,656 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash 848037994, now seen corresponding path program 22 times [2020-12-23 13:52:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:18,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28821073] [2020-12-23 13:52:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:18,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28821073] [2020-12-23 13:52:18,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275360502] [2020-12-23 13:52:18,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:19,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:52:19,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:52:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:19,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:19,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 13:52:19,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223137134] [2020-12-23 13:52:19,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:52:19,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:19,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:52:19,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:52:19,874 INFO L87 Difference]: Start difference. First operand 2461 states and 4918 transitions. Second operand 13 states. [2020-12-23 13:52:19,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:19,927 INFO L93 Difference]: Finished difference Result 2902 states and 5800 transitions. [2020-12-23 13:52:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:52:19,928 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 104 [2020-12-23 13:52:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:19,935 INFO L225 Difference]: With dead ends: 2902 [2020-12-23 13:52:19,936 INFO L226 Difference]: Without dead ends: 2902 [2020-12-23 13:52:19,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:52:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2020-12-23 13:52:19,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2713. [2020-12-23 13:52:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2713 states. [2020-12-23 13:52:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 5422 transitions. [2020-12-23 13:52:19,990 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 5422 transitions. Word has length 104 [2020-12-23 13:52:19,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:19,990 INFO L481 AbstractCegarLoop]: Abstraction has 2713 states and 5422 transitions. [2020-12-23 13:52:19,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:52:19,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 5422 transitions. [2020-12-23 13:52:19,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 13:52:19,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:19,997 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:20,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:20,212 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1700252498, now seen corresponding path program 23 times [2020-12-23 13:52:20,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:20,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499169753] [2020-12-23 13:52:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:20,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499169753] [2020-12-23 13:52:20,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140932785] [2020-12-23 13:52:20,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:52:20,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 13:52:20,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:20,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:52:20,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:20,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:20,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 13:52:20,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741737481] [2020-12-23 13:52:20,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:52:20,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:20,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:52:20,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:52:20,810 INFO L87 Difference]: Start difference. First operand 2713 states and 5422 transitions. Second operand 14 states. [2020-12-23 13:52:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:20,870 INFO L93 Difference]: Finished difference Result 3154 states and 6304 transitions. [2020-12-23 13:52:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:52:20,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2020-12-23 13:52:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:20,885 INFO L225 Difference]: With dead ends: 3154 [2020-12-23 13:52:20,885 INFO L226 Difference]: Without dead ends: 3154 [2020-12-23 13:52:20,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:52:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2020-12-23 13:52:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 2965. [2020-12-23 13:52:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2020-12-23 13:52:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 5926 transitions. [2020-12-23 13:52:20,945 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 5926 transitions. Word has length 108 [2020-12-23 13:52:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:20,945 INFO L481 AbstractCegarLoop]: Abstraction has 2965 states and 5926 transitions. [2020-12-23 13:52:20,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:52:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 5926 transitions. [2020-12-23 13:52:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 13:52:20,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:20,952 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:21,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 13:52:21,165 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:21,166 INFO L82 PathProgramCache]: Analyzing trace with hash -180889030, now seen corresponding path program 24 times [2020-12-23 13:52:21,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:21,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291425758] [2020-12-23 13:52:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:21,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:21,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291425758] [2020-12-23 13:52:21,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696908073] [2020-12-23 13:52:21,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:21,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 13:52:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:52:21,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:21,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:21,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 13:52:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522213728] [2020-12-23 13:52:21,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:52:21,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:21,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:52:21,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:52:21,922 INFO L87 Difference]: Start difference. First operand 2965 states and 5926 transitions. Second operand 15 states. [2020-12-23 13:52:21,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:21,985 INFO L93 Difference]: Finished difference Result 3406 states and 6808 transitions. [2020-12-23 13:52:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:52:21,986 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-12-23 13:52:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:21,993 INFO L225 Difference]: With dead ends: 3406 [2020-12-23 13:52:21,993 INFO L226 Difference]: Without dead ends: 3406 [2020-12-23 13:52:21,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:52:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2020-12-23 13:52:22,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3217. [2020-12-23 13:52:22,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3217 states. [2020-12-23 13:52:22,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 6430 transitions. [2020-12-23 13:52:22,053 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 6430 transitions. Word has length 112 [2020-12-23 13:52:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:22,053 INFO L481 AbstractCegarLoop]: Abstraction has 3217 states and 6430 transitions. [2020-12-23 13:52:22,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:52:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 6430 transitions. [2020-12-23 13:52:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 13:52:22,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:22,061 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:22,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:22,274 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:22,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1730557218, now seen corresponding path program 25 times [2020-12-23 13:52:22,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:22,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756858597] [2020-12-23 13:52:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756858597] [2020-12-23 13:52:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695857982] [2020-12-23 13:52:22,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:22,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:52:22,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:22,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:22,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 13:52:22,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232777091] [2020-12-23 13:52:22,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:52:22,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:22,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:52:22,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:52:22,820 INFO L87 Difference]: Start difference. First operand 3217 states and 6430 transitions. Second operand 16 states. [2020-12-23 13:52:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:22,888 INFO L93 Difference]: Finished difference Result 3658 states and 7312 transitions. [2020-12-23 13:52:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:52:22,896 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 116 [2020-12-23 13:52:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:22,904 INFO L225 Difference]: With dead ends: 3658 [2020-12-23 13:52:22,904 INFO L226 Difference]: Without dead ends: 3658 [2020-12-23 13:52:22,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:52:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2020-12-23 13:52:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3469. [2020-12-23 13:52:22,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3469 states. [2020-12-23 13:52:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 6934 transitions. [2020-12-23 13:52:22,978 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 6934 transitions. Word has length 116 [2020-12-23 13:52:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:22,978 INFO L481 AbstractCegarLoop]: Abstraction has 3469 states and 6934 transitions. [2020-12-23 13:52:22,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:52:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 6934 transitions. [2020-12-23 13:52:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 13:52:22,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:22,986 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:23,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 13:52:23,200 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash 857529354, now seen corresponding path program 26 times [2020-12-23 13:52:23,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:23,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860927941] [2020-12-23 13:52:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:23,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860927941] [2020-12-23 13:52:23,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739441606] [2020-12-23 13:52:23,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:23,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:52:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:23,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:52:23,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:23,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:23,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 13:52:23,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146242331] [2020-12-23 13:52:23,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:52:23,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:52:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:52:23,697 INFO L87 Difference]: Start difference. First operand 3469 states and 6934 transitions. Second operand 17 states. [2020-12-23 13:52:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:23,766 INFO L93 Difference]: Finished difference Result 3910 states and 7816 transitions. [2020-12-23 13:52:23,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:52:23,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-12-23 13:52:23,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:23,775 INFO L225 Difference]: With dead ends: 3910 [2020-12-23 13:52:23,775 INFO L226 Difference]: Without dead ends: 3910 [2020-12-23 13:52:23,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:52:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2020-12-23 13:52:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3721. [2020-12-23 13:52:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3721 states. [2020-12-23 13:52:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 7438 transitions. [2020-12-23 13:52:23,869 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 7438 transitions. Word has length 120 [2020-12-23 13:52:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:23,870 INFO L481 AbstractCegarLoop]: Abstraction has 3721 states and 7438 transitions. [2020-12-23 13:52:23,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:52:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 7438 transitions. [2020-12-23 13:52:23,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 13:52:23,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:23,880 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:24,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 13:52:24,094 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:24,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1142279922, now seen corresponding path program 27 times [2020-12-23 13:52:24,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:24,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990770575] [2020-12-23 13:52:24,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:24,347 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:24,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990770575] [2020-12-23 13:52:24,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971964037] [2020-12-23 13:52:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:24,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 13:52:24,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:24,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:52:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:24,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:24,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 13:52:24,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109593558] [2020-12-23 13:52:24,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:52:24,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:52:24,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:52:24,943 INFO L87 Difference]: Start difference. First operand 3721 states and 7438 transitions. Second operand 18 states. [2020-12-23 13:52:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:25,029 INFO L93 Difference]: Finished difference Result 4162 states and 8320 transitions. [2020-12-23 13:52:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:52:25,030 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 124 [2020-12-23 13:52:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:25,039 INFO L225 Difference]: With dead ends: 4162 [2020-12-23 13:52:25,039 INFO L226 Difference]: Without dead ends: 4162 [2020-12-23 13:52:25,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:52:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2020-12-23 13:52:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 3973. [2020-12-23 13:52:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3973 states. [2020-12-23 13:52:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 7942 transitions. [2020-12-23 13:52:25,113 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 7942 transitions. Word has length 124 [2020-12-23 13:52:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:25,114 INFO L481 AbstractCegarLoop]: Abstraction has 3973 states and 7942 transitions. [2020-12-23 13:52:25,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:52:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 7942 transitions. [2020-12-23 13:52:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 13:52:25,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:25,123 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:25,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 13:52:25,339 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:25,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2013990362, now seen corresponding path program 28 times [2020-12-23 13:52:25,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:25,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601137534] [2020-12-23 13:52:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:25,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601137534] [2020-12-23 13:52:25,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046838194] [2020-12-23 13:52:25,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:26,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:52:26,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:26,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:52:26,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:27,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:27,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 13:52:27,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426351201] [2020-12-23 13:52:27,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:52:27,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:27,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:52:27,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:52:27,035 INFO L87 Difference]: Start difference. First operand 3973 states and 7942 transitions. Second operand 19 states. [2020-12-23 13:52:27,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:27,120 INFO L93 Difference]: Finished difference Result 4414 states and 8824 transitions. [2020-12-23 13:52:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:52:27,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2020-12-23 13:52:27,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:27,129 INFO L225 Difference]: With dead ends: 4414 [2020-12-23 13:52:27,129 INFO L226 Difference]: Without dead ends: 4414 [2020-12-23 13:52:27,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:52:27,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4414 states. [2020-12-23 13:52:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4414 to 4225. [2020-12-23 13:52:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4225 states. [2020-12-23 13:52:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4225 states to 4225 states and 8446 transitions. [2020-12-23 13:52:27,202 INFO L78 Accepts]: Start accepts. Automaton has 4225 states and 8446 transitions. Word has length 128 [2020-12-23 13:52:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:27,203 INFO L481 AbstractCegarLoop]: Abstraction has 4225 states and 8446 transitions. [2020-12-23 13:52:27,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:52:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4225 states and 8446 transitions. [2020-12-23 13:52:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 13:52:27,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:27,213 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:27,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:27,428 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash 536254658, now seen corresponding path program 29 times [2020-12-23 13:52:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:27,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263193726] [2020-12-23 13:52:27,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:27,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263193726] [2020-12-23 13:52:27,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633155435] [2020-12-23 13:52:27,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:27,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 13:52:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:27,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 13:52:27,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:28,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:28,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 13:52:28,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180144372] [2020-12-23 13:52:28,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:52:28,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:28,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:52:28,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:52:28,093 INFO L87 Difference]: Start difference. First operand 4225 states and 8446 transitions. Second operand 20 states. [2020-12-23 13:52:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:28,178 INFO L93 Difference]: Finished difference Result 4666 states and 9328 transitions. [2020-12-23 13:52:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:52:28,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 132 [2020-12-23 13:52:28,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:28,183 INFO L225 Difference]: With dead ends: 4666 [2020-12-23 13:52:28,183 INFO L226 Difference]: Without dead ends: 4666 [2020-12-23 13:52:28,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:52:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2020-12-23 13:52:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 4477. [2020-12-23 13:52:28,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4477 states. [2020-12-23 13:52:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 8950 transitions. [2020-12-23 13:52:28,251 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 8950 transitions. Word has length 132 [2020-12-23 13:52:28,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:28,252 INFO L481 AbstractCegarLoop]: Abstraction has 4477 states and 8950 transitions. [2020-12-23 13:52:28,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:52:28,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 8950 transitions. [2020-12-23 13:52:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 13:52:28,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:28,265 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:28,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 13:52:28,481 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2144497578, now seen corresponding path program 30 times [2020-12-23 13:52:28,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:28,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506997549] [2020-12-23 13:52:28,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:28,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506997549] [2020-12-23 13:52:28,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208465992] [2020-12-23 13:52:28,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:29,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 13:52:29,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:52:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:29,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:29,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 13:52:29,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841323364] [2020-12-23 13:52:29,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 13:52:29,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 13:52:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:52:29,588 INFO L87 Difference]: Start difference. First operand 4477 states and 8950 transitions. Second operand 21 states. [2020-12-23 13:52:29,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:29,683 INFO L93 Difference]: Finished difference Result 4918 states and 9832 transitions. [2020-12-23 13:52:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:52:29,684 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 136 [2020-12-23 13:52:29,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:29,690 INFO L225 Difference]: With dead ends: 4918 [2020-12-23 13:52:29,691 INFO L226 Difference]: Without dead ends: 4918 [2020-12-23 13:52:29,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:52:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2020-12-23 13:52:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 4729. [2020-12-23 13:52:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4729 states. [2020-12-23 13:52:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 9454 transitions. [2020-12-23 13:52:29,774 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 9454 transitions. Word has length 136 [2020-12-23 13:52:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:29,774 INFO L481 AbstractCegarLoop]: Abstraction has 4729 states and 9454 transitions. [2020-12-23 13:52:29,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 13:52:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 9454 transitions. [2020-12-23 13:52:29,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 13:52:29,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:29,785 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:29,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:30,000 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:30,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1318621842, now seen corresponding path program 31 times [2020-12-23 13:52:30,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:30,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542516360] [2020-12-23 13:52:30,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542516360] [2020-12-23 13:52:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348837273] [2020-12-23 13:52:30,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:30,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:52:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:30,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:30,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 13:52:30,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16820489] [2020-12-23 13:52:30,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:52:30,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:30,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:52:30,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:52:30,695 INFO L87 Difference]: Start difference. First operand 4729 states and 9454 transitions. Second operand 22 states. [2020-12-23 13:52:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:30,820 INFO L93 Difference]: Finished difference Result 5170 states and 10336 transitions. [2020-12-23 13:52:30,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:52:30,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 140 [2020-12-23 13:52:30,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:30,827 INFO L225 Difference]: With dead ends: 5170 [2020-12-23 13:52:30,827 INFO L226 Difference]: Without dead ends: 5170 [2020-12-23 13:52:30,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:52:30,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5170 states. [2020-12-23 13:52:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5170 to 4981. [2020-12-23 13:52:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4981 states. [2020-12-23 13:52:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 9958 transitions. [2020-12-23 13:52:30,917 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 9958 transitions. Word has length 140 [2020-12-23 13:52:30,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:30,918 INFO L481 AbstractCegarLoop]: Abstraction has 4981 states and 9958 transitions. [2020-12-23 13:52:30,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:52:30,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 9958 transitions. [2020-12-23 13:52:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 13:52:30,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:30,929 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:31,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 13:52:31,145 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:31,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash 910360954, now seen corresponding path program 32 times [2020-12-23 13:52:31,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:31,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838523347] [2020-12-23 13:52:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:31,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838523347] [2020-12-23 13:52:31,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896405996] [2020-12-23 13:52:31,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:31,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:52:31,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 13:52:31,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-12-23 13:52:31,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:31,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 13:52:31,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363775898] [2020-12-23 13:52:31,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 13:52:31,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:31,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 13:52:31,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:52:31,795 INFO L87 Difference]: Start difference. First operand 4981 states and 9958 transitions. Second operand 23 states. [2020-12-23 13:52:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:52:31,889 INFO L93 Difference]: Finished difference Result 5233 states and 10462 transitions. [2020-12-23 13:52:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:52:31,890 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 144 [2020-12-23 13:52:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:52:31,895 INFO L225 Difference]: With dead ends: 5233 [2020-12-23 13:52:31,896 INFO L226 Difference]: Without dead ends: 5233 [2020-12-23 13:52:31,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:52:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2020-12-23 13:52:31,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 5233. [2020-12-23 13:52:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5233 states. [2020-12-23 13:52:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 10462 transitions. [2020-12-23 13:52:32,046 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 10462 transitions. Word has length 144 [2020-12-23 13:52:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:52:32,047 INFO L481 AbstractCegarLoop]: Abstraction has 5233 states and 10462 transitions. [2020-12-23 13:52:32,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 13:52:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 10462 transitions. [2020-12-23 13:52:32,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 13:52:32,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:52:32,061 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:52:32,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 13:52:32,271 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:52:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:52:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1405860962, now seen corresponding path program 33 times [2020-12-23 13:52:32,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:52:32,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541320445] [2020-12-23 13:52:32,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:52:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:52:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:52:35,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541320445] [2020-12-23 13:52:35,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195394123] [2020-12-23 13:52:35,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:52:35,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-23 13:52:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:52:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 130 conjunts are in the unsatisfiable core [2020-12-23 13:52:35,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:52:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:52:36,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:52:36,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-23 13:52:36,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797244989] [2020-12-23 13:52:36,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 13:52:36,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:52:36,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 13:52:36,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 13:52:36,272 INFO L87 Difference]: Start difference. First operand 5233 states and 10462 transitions. Second operand 63 states. [2020-12-23 13:53:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:53:21,223 INFO L93 Difference]: Finished difference Result 34492 states and 68977 transitions. [2020-12-23 13:53:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2020-12-23 13:53:21,224 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-12-23 13:53:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:53:21,276 INFO L225 Difference]: With dead ends: 34492 [2020-12-23 13:53:21,276 INFO L226 Difference]: Without dead ends: 34490 [2020-12-23 13:53:21,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26335 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=1043, Invalid=84513, Unknown=0, NotChecked=0, Total=85556 [2020-12-23 13:53:21,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34490 states. [2020-12-23 13:53:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34490 to 5485. [2020-12-23 13:53:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5485 states. [2020-12-23 13:53:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 11045 transitions. [2020-12-23 13:53:21,569 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 11045 transitions. Word has length 148 [2020-12-23 13:53:21,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:53:21,569 INFO L481 AbstractCegarLoop]: Abstraction has 5485 states and 11045 transitions. [2020-12-23 13:53:21,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 13:53:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 11045 transitions. [2020-12-23 13:53:21,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 13:53:21,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:53:21,578 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:53:21,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 13:53:21,792 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:53:21,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:53:21,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1360659218, now seen corresponding path program 34 times [2020-12-23 13:53:21,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:53:21,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258639294] [2020-12-23 13:53:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:53:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:53:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 1292 trivial. 0 not checked. [2020-12-23 13:53:21,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258639294] [2020-12-23 13:53:21,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:53:21,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:53:21,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580714698] [2020-12-23 13:53:21,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 13:53:21,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:53:21,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 13:53:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 13:53:21,882 INFO L87 Difference]: Start difference. First operand 5485 states and 11045 transitions. Second operand 3 states. [2020-12-23 13:53:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:53:21,917 INFO L93 Difference]: Finished difference Result 2945 states and 3782 transitions. [2020-12-23 13:53:21,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 13:53:21,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-23 13:53:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:53:21,923 INFO L225 Difference]: With dead ends: 2945 [2020-12-23 13:53:21,923 INFO L226 Difference]: Without dead ends: 2945 [2020-12-23 13:53:21,923 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 [2020-12-23 13:53:21,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2020-12-23 13:53:21,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2924. [2020-12-23 13:53:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2924 states. [2020-12-23 13:53:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 3760 transitions. [2020-12-23 13:53:21,951 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 3760 transitions. Word has length 148 [2020-12-23 13:53:21,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:53:21,951 INFO L481 AbstractCegarLoop]: Abstraction has 2924 states and 3760 transitions. [2020-12-23 13:53:21,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 13:53:21,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 3760 transitions. [2020-12-23 13:53:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 13:53:21,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:53:21,955 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:53:21,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-23 13:53:21,956 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:53:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:53:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1931970334, now seen corresponding path program 35 times [2020-12-23 13:53:21,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:53:21,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377077867] [2020-12-23 13:53:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:53:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:53:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:53:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377077867] [2020-12-23 13:53:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401174465] [2020-12-23 13:53:25,313 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:53:25,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-23 13:53:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:53:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-23 13:53:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:53:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:53:25,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:53:25,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-23 13:53:25,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877684329] [2020-12-23 13:53:25,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 13:53:25,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:53:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 13:53:25,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 13:53:25,939 INFO L87 Difference]: Start difference. First operand 2924 states and 3760 transitions. Second operand 63 states. [2020-12-23 13:54:03,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:54:03,937 INFO L93 Difference]: Finished difference Result 14303 states and 20974 transitions. [2020-12-23 13:54:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2020-12-23 13:54:03,938 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-12-23 13:54:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:54:03,961 INFO L225 Difference]: With dead ends: 14303 [2020-12-23 13:54:03,962 INFO L226 Difference]: Without dead ends: 14301 [2020-12-23 13:54:03,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26565 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1047, Invalid=85095, Unknown=0, NotChecked=0, Total=86142 [2020-12-23 13:54:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14301 states. [2020-12-23 13:54:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14301 to 2927. [2020-12-23 13:54:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2927 states. [2020-12-23 13:54:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 3764 transitions. [2020-12-23 13:54:04,077 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 3764 transitions. Word has length 148 [2020-12-23 13:54:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:54:04,078 INFO L481 AbstractCegarLoop]: Abstraction has 2927 states and 3764 transitions. [2020-12-23 13:54:04,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 13:54:04,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 3764 transitions. [2020-12-23 13:54:04,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 13:54:04,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:54:04,082 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:54:04,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 13:54:04,296 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:54:04,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:54:04,296 INFO L82 PathProgramCache]: Analyzing trace with hash -21531294, now seen corresponding path program 36 times [2020-12-23 13:54:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:54:04,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980595467] [2020-12-23 13:54:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:54:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:54:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:54:07,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980595467] [2020-12-23 13:54:07,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432342919] [2020-12-23 13:54:07,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:54:08,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-23 13:54:08,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:54:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 130 conjunts are in the unsatisfiable core [2020-12-23 13:54:08,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:54:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:54:08,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:54:08,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-23 13:54:08,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897879765] [2020-12-23 13:54:08,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 13:54:08,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:54:08,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 13:54:08,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 13:54:08,467 INFO L87 Difference]: Start difference. First operand 2927 states and 3764 transitions. Second operand 63 states. [2020-12-23 13:54:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:54:46,970 INFO L93 Difference]: Finished difference Result 14307 states and 20976 transitions. [2020-12-23 13:54:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 295 states. [2020-12-23 13:54:46,971 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-12-23 13:54:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:54:46,984 INFO L225 Difference]: With dead ends: 14307 [2020-12-23 13:54:46,984 INFO L226 Difference]: Without dead ends: 14305 [2020-12-23 13:54:46,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26796 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1051, Invalid=85679, Unknown=0, NotChecked=0, Total=86730 [2020-12-23 13:54:47,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14305 states. [2020-12-23 13:54:47,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14305 to 2933. [2020-12-23 13:54:47,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2933 states. [2020-12-23 13:54:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 3771 transitions. [2020-12-23 13:54:47,089 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 3771 transitions. Word has length 148 [2020-12-23 13:54:47,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:54:47,090 INFO L481 AbstractCegarLoop]: Abstraction has 2933 states and 3771 transitions. [2020-12-23 13:54:47,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 13:54:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 3771 transitions. [2020-12-23 13:54:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 13:54:47,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:54:47,095 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:54:47,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 13:54:47,309 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:54:47,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:54:47,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1820897762, now seen corresponding path program 37 times [2020-12-23 13:54:47,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:54:47,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179972078] [2020-12-23 13:54:47,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:54:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:54:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:54:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179972078] [2020-12-23 13:54:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221184005] [2020-12-23 13:54:50,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:54:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:54:50,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-23 13:54:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:54:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:54:51,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:54:51,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2020-12-23 13:54:51,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856768988] [2020-12-23 13:54:51,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 13:54:51,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:54:51,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 13:54:51,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 13:54:51,093 INFO L87 Difference]: Start difference. First operand 2933 states and 3771 transitions. Second operand 63 states. [2020-12-23 13:55:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:55:31,721 INFO L93 Difference]: Finished difference Result 14313 states and 20983 transitions. [2020-12-23 13:55:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2020-12-23 13:55:31,722 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2020-12-23 13:55:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:55:31,738 INFO L225 Difference]: With dead ends: 14313 [2020-12-23 13:55:31,738 INFO L226 Difference]: Without dead ends: 14311 [2020-12-23 13:55:31,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27028 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=1055, Invalid=86265, Unknown=0, NotChecked=0, Total=87320 [2020-12-23 13:55:31,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14311 states. [2020-12-23 13:55:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14311 to 2939. [2020-12-23 13:55:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2939 states. [2020-12-23 13:55:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 3778 transitions. [2020-12-23 13:55:31,825 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 3778 transitions. Word has length 148 [2020-12-23 13:55:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:55:31,826 INFO L481 AbstractCegarLoop]: Abstraction has 2939 states and 3778 transitions. [2020-12-23 13:55:31,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 13:55:31,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 3778 transitions. [2020-12-23 13:55:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 13:55:31,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:55:31,829 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:55:32,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 13:55:32,030 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:55:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:55:32,031 INFO L82 PathProgramCache]: Analyzing trace with hash 694955618, now seen corresponding path program 38 times [2020-12-23 13:55:32,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:55:32,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290167700] [2020-12-23 13:55:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:55:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat