/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-New_States.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-12 12:59:00,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-12 12:59:00,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-12 12:59:00,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-12 12:59:00,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-12 12:59:00,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-12 12:59:00,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-12 12:59:00,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-12 12:59:00,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-12 12:59:01,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-12 12:59:01,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-12 12:59:01,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-12 12:59:01,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-12 12:59:01,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-12 12:59:01,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-12 12:59:01,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-12 12:59:01,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-12 12:59:01,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-12 12:59:01,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-12 12:59:01,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-12 12:59:01,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-12 12:59:01,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-12 12:59:01,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-12 12:59:01,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-12 12:59:01,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-12 12:59:01,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-12 12:59:01,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-12 12:59:01,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-12 12:59:01,055 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-12 12:59:01,056 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-12 12:59:01,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-12 12:59:01,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-12 12:59:01,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-12 12:59:01,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-12 12:59:01,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-12 12:59:01,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-12 12:59:01,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-12 12:59:01,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-12 12:59:01,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-12 12:59:01,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-12 12:59:01,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-12 12:59:01,067 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-New_States.epf [2020-11-12 12:59:01,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-12 12:59:01,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-12 12:59:01,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-12 12:59:01,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-12 12:59:01,136 INFO L138 SettingsManager]: * Use SBE=true [2020-11-12 12:59:01,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-12 12:59:01,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-12 12:59:01,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-12 12:59:01,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-12 12:59:01,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-12 12:59:01,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-12 12:59:01,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-12 12:59:01,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-12 12:59:01,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-12 12:59:01,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-12 12:59:01,140 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-12 12:59:01,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-12 12:59:01,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-12 12:59:01,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-12 12:59:01,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-12 12:59:01,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-12 12:59:01,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 12:59:01,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-12 12:59:01,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-12 12:59:01,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-12 12:59:01,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-12 12:59:01,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-12 12:59:01,143 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-11-12 12:59:01,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-12 12:59:01,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-12 12:59:01,143 INFO L138 SettingsManager]: * Sleep set reduction in concurrent analysis=NEW_STATES 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-12 12:59:01,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-12 12:59:01,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-12 12:59:01,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-12 12:59:01,584 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-12 12:59:01,584 INFO L275 PluginConnector]: CDTParser initialized [2020-11-12 12:59:01,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-11-12 12:59:01,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5db1f161/646c125de73543b0bcaeefeadc707e84/FLAG527e30c61 [2020-11-12 12:59:02,477 INFO L306 CDTParser]: Found 1 translation units. [2020-11-12 12:59:02,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-11-12 12:59:02,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5db1f161/646c125de73543b0bcaeefeadc707e84/FLAG527e30c61 [2020-11-12 12:59:02,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f5db1f161/646c125de73543b0bcaeefeadc707e84 [2020-11-12 12:59:02,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-12 12:59:02,708 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-12 12:59:02,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-12 12:59:02,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-12 12:59:02,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-12 12:59:02,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc356a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:02, skipping insertion in model container [2020-11-12 12:59:02,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:59:02" (1/1) ... [2020-11-12 12:59:02,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-12 12:59:02,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-12 12:59:03,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 12:59:03,453 INFO L203 MainTranslator]: Completed pre-run [2020-11-12 12:59:03,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-12 12:59:03,845 INFO L208 MainTranslator]: Completed translation [2020-11-12 12:59:03,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03 WrapperNode [2020-11-12 12:59:03,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-12 12:59:03,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-12 12:59:03,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-12 12:59:03,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-12 12:59:03,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:03,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:03,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-12 12:59:03,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-12 12:59:03,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-12 12:59:03,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-12 12:59:03,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:03,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:03,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:03,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:03,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:04,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:04,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... [2020-11-12 12:59:04,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-12 12:59:04,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-12 12:59:04,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-12 12:59:04,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-12 12:59:04,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-12 12:59:04,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-12 12:59:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-12 12:59:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-12 12:59:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-11-12 12:59:04,110 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-11-12 12:59:04,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-12 12:59:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-12 12:59:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-12 12:59:04,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-12 12:59:04,113 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-12 12:59:04,706 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-12 12:59:04,707 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-12 12:59:04,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:04 BoogieIcfgContainer [2020-11-12 12:59:04,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-12 12:59:04,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-12 12:59:04,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-12 12:59:04,715 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-12 12:59:04,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:59:02" (1/3) ... [2020-11-12 12:59:04,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378488c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:04, skipping insertion in model container [2020-11-12 12:59:04,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:59:03" (2/3) ... [2020-11-12 12:59:04,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378488c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:59:04, skipping insertion in model container [2020-11-12 12:59:04,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:59:04" (3/3) ... [2020-11-12 12:59:04,719 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-11-12 12:59:04,738 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-12 12:59:04,738 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-12 12:59:04,742 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-12 12:59:04,743 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-12 12:59:04,775 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,776 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,776 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,776 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,776 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,777 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,777 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,777 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,777 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,778 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,778 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,778 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,778 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,779 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,779 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,779 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,779 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,780 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,780 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,780 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,780 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,781 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,781 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,781 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,781 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,782 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,782 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,782 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,782 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,783 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,783 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,783 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,783 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,784 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,784 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,784 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,784 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,785 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,785 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,785 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,785 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,786 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,790 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-12 12:59:04,801 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-11-12 12:59:04,816 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-12 12:59:04,842 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-12 12:59:04,843 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-12 12:59:04,843 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-12 12:59:04,843 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-12 12:59:04,843 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-12 12:59:04,843 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-12 12:59:04,844 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-12 12:59:04,844 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-12 12:59:04,857 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 90 places, 94 transitions, 196 flow [2020-11-12 12:59:04,888 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 324 states, 322 states have (on average 2.0031055900621118) internal successors, (645), 323 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,043 WARN L455 BasicCegarLoop]: Sleep Set Reduction Time: 152ms [2020-11-12 12:59:05,045 WARN L456 BasicCegarLoop]: Sleep set: input automaton has 324 states, 322 states have (on average 2.0031055900621118) internal successors, (645), 323 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,049 WARN L457 BasicCegarLoop]: Sleep set: output automaton has 719 states, 651 states have (on average 1.1920122887864824) internal successors, (776), 718 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 719 states, 651 states have (on average 1.1920122887864824) internal successors, (776), 718 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-12 12:59:05,066 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:05,067 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:05,067 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash -948995591, now seen corresponding path program 1 times [2020-11-12 12:59:05,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:05,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043146651] [2020-11-12 12:59:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:05,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043146651] [2020-11-12 12:59:05,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 12:59:05,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-12 12:59:05,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000892627] [2020-11-12 12:59:05,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-12 12:59:05,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:05,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-12 12:59:05,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-12 12:59:05,390 INFO L87 Difference]: Start difference. First operand has 719 states, 651 states have (on average 1.1920122887864824) internal successors, (776), 718 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:05,426 INFO L93 Difference]: Finished difference Result 344 states and 396 transitions. [2020-11-12 12:59:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-12 12:59:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2020-11-12 12:59:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:05,439 INFO L225 Difference]: With dead ends: 344 [2020-11-12 12:59:05,439 INFO L226 Difference]: Without dead ends: 96 [2020-11-12 12:59:05,441 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-12 12:59:05,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-12 12:59:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-11-12 12:59:05,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.076086956521739) internal successors, (99), 92 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2020-11-12 12:59:05,486 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 60 [2020-11-12 12:59:05,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:05,487 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2020-11-12 12:59:05,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 30.0) internal successors, (60), 2 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2020-11-12 12:59:05,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-12 12:59:05,490 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:05,490 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:05,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-12 12:59:05,491 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:05,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1242398598, now seen corresponding path program 1 times [2020-11-12 12:59:05,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:05,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302893075] [2020-11-12 12:59:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:05,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302893075] [2020-11-12 12:59:05,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-12 12:59:05,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-12 12:59:05,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33217467] [2020-11-12 12:59:05,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-12 12:59:05,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-12 12:59:05,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-12 12:59:05,645 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:05,682 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-11-12 12:59:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-12 12:59:05,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2020-11-12 12:59:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:05,685 INFO L225 Difference]: With dead ends: 112 [2020-11-12 12:59:05,685 INFO L226 Difference]: Without dead ends: 112 [2020-11-12 12:59:05,686 INFO L749 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 [2020-11-12 12:59:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-12 12:59:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-11-12 12:59:05,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-11-12 12:59:05,696 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 60 [2020-11-12 12:59:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:05,696 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-11-12 12:59:05,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-11-12 12:59:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-11-12 12:59:05,699 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:05,699 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:05,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-12 12:59:05,699 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1512039418, now seen corresponding path program 1 times [2020-11-12 12:59:05,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:05,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812376833] [2020-11-12 12:59:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:05,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812376833] [2020-11-12 12:59:05,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194588405] [2020-11-12 12:59:05,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-12 12:59:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-12 12:59:06,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-12 12:59:06,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-11-12 12:59:06,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743828168] [2020-11-12 12:59:06,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-12 12:59:06,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-12 12:59:06,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 12:59:06,100 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:06,139 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2020-11-12 12:59:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-12 12:59:06,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2020-11-12 12:59:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:06,145 INFO L225 Difference]: With dead ends: 118 [2020-11-12 12:59:06,145 INFO L226 Difference]: Without dead ends: 118 [2020-11-12 12:59:06,145 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-12 12:59:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-12 12:59:06,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2020-11-12 12:59:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.074468085106383) internal successors, (101), 94 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-11-12 12:59:06,161 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 65 [2020-11-12 12:59:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:06,162 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-11-12 12:59:06,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-11-12 12:59:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-12 12:59:06,169 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:06,169 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:06,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-12 12:59:06,385 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:06,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1553516191, now seen corresponding path program 1 times [2020-11-12 12:59:06,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:06,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351355896] [2020-11-12 12:59:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:06,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351355896] [2020-11-12 12:59:06,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636690209] [2020-11-12 12:59:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-12 12:59:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-12 12:59:06,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:06,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-12 12:59:06,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548591435] [2020-11-12 12:59:06,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 12:59:06,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 12:59:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-12 12:59:06,626 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:06,681 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2020-11-12 12:59:06,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-12 12:59:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2020-11-12 12:59:06,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:06,683 INFO L225 Difference]: With dead ends: 137 [2020-11-12 12:59:06,683 INFO L226 Difference]: Without dead ends: 137 [2020-11-12 12:59:06,684 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-12 12:59:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-11-12 12:59:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 119. [2020-11-12 12:59:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 118 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2020-11-12 12:59:06,693 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 73 [2020-11-12 12:59:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:06,694 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2020-11-12 12:59:06,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2020-11-12 12:59:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-11-12 12:59:06,695 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:06,695 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:06,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:06,911 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash -376252195, now seen corresponding path program 2 times [2020-11-12 12:59:06,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:06,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840764056] [2020-11-12 12:59:06,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-12 12:59:07,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840764056] [2020-11-12 12:59:07,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243365474] [2020-11-12 12:59:07,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:07,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 12:59:07,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:07,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-12 12:59:07,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-12 12:59:07,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:07,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-12 12:59:07,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044844951] [2020-11-12 12:59:07,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-12 12:59:07,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:07,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-12 12:59:07,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-12 12:59:07,219 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:07,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:07,267 INFO L93 Difference]: Finished difference Result 199 states and 220 transitions. [2020-11-12 12:59:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-12 12:59:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2020-11-12 12:59:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:07,270 INFO L225 Difference]: With dead ends: 199 [2020-11-12 12:59:07,270 INFO L226 Difference]: Without dead ends: 199 [2020-11-12 12:59:07,271 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-12 12:59:07,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-12 12:59:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 157. [2020-11-12 12:59:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1025641025641026) internal successors, (172), 156 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 172 transitions. [2020-11-12 12:59:07,281 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 172 transitions. Word has length 78 [2020-11-12 12:59:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:07,282 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 172 transitions. [2020-11-12 12:59:07,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 172 transitions. [2020-11-12 12:59:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-11-12 12:59:07,283 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:07,284 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:07,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:07,499 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:07,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:07,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1077469432, now seen corresponding path program 3 times [2020-11-12 12:59:07,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:07,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738237002] [2020-11-12 12:59:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-12 12:59:07,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738237002] [2020-11-12 12:59:07,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288978596] [2020-11-12 12:59:07,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:07,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-12 12:59:07,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-12 12:59:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-12 12:59:07,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:07,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-11-12 12:59:07,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178350228] [2020-11-12 12:59:07,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-12 12:59:07,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:07,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-12 12:59:07,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-12 12:59:07,929 INFO L87 Difference]: Start difference. First operand 157 states and 172 transitions. Second operand has 12 states, 12 states have (on average 9.166666666666666) internal successors, (110), 12 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:08,939 INFO L93 Difference]: Finished difference Result 365 states and 410 transitions. [2020-11-12 12:59:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-12 12:59:08,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.166666666666666) internal successors, (110), 12 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2020-11-12 12:59:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:08,942 INFO L225 Difference]: With dead ends: 365 [2020-11-12 12:59:08,942 INFO L226 Difference]: Without dead ends: 365 [2020-11-12 12:59:08,944 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=598, Invalid=2158, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 12:59:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-11-12 12:59:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 253. [2020-11-12 12:59:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.1150793650793651) internal successors, (281), 252 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 281 transitions. [2020-11-12 12:59:08,978 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 281 transitions. Word has length 86 [2020-11-12 12:59:08,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:08,978 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 281 transitions. [2020-11-12 12:59:08,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 9.166666666666666) internal successors, (110), 12 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 281 transitions. [2020-11-12 12:59:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-11-12 12:59:08,981 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:08,982 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:09,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:09,200 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:09,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1643299863, now seen corresponding path program 4 times [2020-11-12 12:59:09,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:09,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927786153] [2020-11-12 12:59:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-12 12:59:09,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927786153] [2020-11-12 12:59:09,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641577856] [2020-11-12 12:59:09,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:09,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 12:59:09,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:09,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-12 12:59:09,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:09,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-12 12:59:09,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:09,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-11-12 12:59:09,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252374463] [2020-11-12 12:59:09,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-12 12:59:09,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:09,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-12 12:59:09,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-11-12 12:59:09,693 INFO L87 Difference]: Start difference. First operand 253 states and 281 transitions. Second operand has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:09,835 INFO L93 Difference]: Finished difference Result 347 states and 389 transitions. [2020-11-12 12:59:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-12 12:59:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2020-11-12 12:59:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:09,839 INFO L225 Difference]: With dead ends: 347 [2020-11-12 12:59:09,839 INFO L226 Difference]: Without dead ends: 347 [2020-11-12 12:59:09,840 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-11-12 12:59:09,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-11-12 12:59:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 307. [2020-11-12 12:59:09,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.1176470588235294) internal successors, (342), 306 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 342 transitions. [2020-11-12 12:59:09,854 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 342 transitions. Word has length 99 [2020-11-12 12:59:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:09,854 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 342 transitions. [2020-11-12 12:59:09,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 8.727272727272727) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 342 transitions. [2020-11-12 12:59:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-11-12 12:59:09,858 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:09,858 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:10,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-12 12:59:10,074 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:10,075 INFO L82 PathProgramCache]: Analyzing trace with hash 352960659, now seen corresponding path program 5 times [2020-11-12 12:59:10,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:10,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596590097] [2020-11-12 12:59:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-12 12:59:10,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596590097] [2020-11-12 12:59:10,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426836970] [2020-11-12 12:59:10,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:10,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-12 12:59:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:10,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 12:59:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-12 12:59:10,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:10,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-11-12 12:59:10,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253852530] [2020-11-12 12:59:10,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-12 12:59:10,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:10,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-12 12:59:10,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-12 12:59:10,404 INFO L87 Difference]: Start difference. First operand 307 states and 342 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:10,564 INFO L93 Difference]: Finished difference Result 401 states and 450 transitions. [2020-11-12 12:59:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-12 12:59:10,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2020-11-12 12:59:10,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:10,567 INFO L225 Difference]: With dead ends: 401 [2020-11-12 12:59:10,567 INFO L226 Difference]: Without dead ends: 401 [2020-11-12 12:59:10,568 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-12 12:59:10,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-11-12 12:59:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 361. [2020-11-12 12:59:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 1.1194444444444445) internal successors, (403), 360 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 403 transitions. [2020-11-12 12:59:10,580 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 403 transitions. Word has length 104 [2020-11-12 12:59:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:10,580 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 403 transitions. [2020-11-12 12:59:10,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 403 transitions. [2020-11-12 12:59:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-12 12:59:10,582 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:10,582 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:10,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:10,795 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:10,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1198968425, now seen corresponding path program 6 times [2020-11-12 12:59:10,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:10,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430925439] [2020-11-12 12:59:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-12 12:59:11,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430925439] [2020-11-12 12:59:11,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871193981] [2020-11-12 12:59:11,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:11,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-12 12:59:11,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-12 12:59:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-11-12 12:59:11,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:11,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-11-12 12:59:11,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282551686] [2020-11-12 12:59:11,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-12 12:59:11,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-12 12:59:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-11-12 12:59:11,359 INFO L87 Difference]: Start difference. First operand 361 states and 403 transitions. Second operand has 20 states, 20 states have (on average 6.65) internal successors, (133), 20 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:14,814 INFO L93 Difference]: Finished difference Result 696 states and 784 transitions. [2020-11-12 12:59:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-11-12 12:59:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.65) internal successors, (133), 20 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2020-11-12 12:59:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:14,820 INFO L225 Difference]: With dead ends: 696 [2020-11-12 12:59:14,820 INFO L226 Difference]: Without dead ends: 696 [2020-11-12 12:59:14,827 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7117 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3359, Invalid=15001, Unknown=0, NotChecked=0, Total=18360 [2020-11-12 12:59:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-11-12 12:59:14,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 521. [2020-11-12 12:59:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 1.123076923076923) internal successors, (584), 520 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 584 transitions. [2020-11-12 12:59:14,846 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 584 transitions. Word has length 109 [2020-11-12 12:59:14,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:14,846 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 584 transitions. [2020-11-12 12:59:14,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.65) internal successors, (133), 20 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:14,846 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 584 transitions. [2020-11-12 12:59:14,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-11-12 12:59:14,852 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:14,852 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:15,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:15,065 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:15,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:15,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1452853970, now seen corresponding path program 7 times [2020-11-12 12:59:15,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:15,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092959001] [2020-11-12 12:59:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:15,256 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-12 12:59:15,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092959001] [2020-11-12 12:59:15,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194498626] [2020-11-12 12:59:15,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:15,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 12:59:15,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 7 proven. 81 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-12 12:59:15,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:15,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-12 12:59:15,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953103751] [2020-11-12 12:59:15,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-12 12:59:15,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:15,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-12 12:59:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-11-12 12:59:15,506 INFO L87 Difference]: Start difference. First operand 521 states and 584 transitions. Second operand has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:15,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:15,750 INFO L93 Difference]: Finished difference Result 643 states and 724 transitions. [2020-11-12 12:59:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-12 12:59:15,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2020-11-12 12:59:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:15,758 INFO L225 Difference]: With dead ends: 643 [2020-11-12 12:59:15,758 INFO L226 Difference]: Without dead ends: 643 [2020-11-12 12:59:15,759 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-11-12 12:59:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2020-11-12 12:59:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 591. [2020-11-12 12:59:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 1.123728813559322) internal successors, (663), 590 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 663 transitions. [2020-11-12 12:59:15,774 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 663 transitions. Word has length 122 [2020-11-12 12:59:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:15,774 INFO L481 AbstractCegarLoop]: Abstraction has 591 states and 663 transitions. [2020-11-12 12:59:15,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.529411764705882) internal successors, (111), 17 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 663 transitions. [2020-11-12 12:59:15,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-12 12:59:15,777 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:15,777 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:15,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-12 12:59:15,991 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:15,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1995828530, now seen corresponding path program 8 times [2020-11-12 12:59:15,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:15,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791886698] [2020-11-12 12:59:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 7 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-12 12:59:16,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791886698] [2020-11-12 12:59:16,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339609940] [2020-11-12 12:59:16,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:16,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 12:59:16,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 12:59:16,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 7 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-12 12:59:16,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:16,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-12 12:59:16,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112654297] [2020-11-12 12:59:16,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-12 12:59:16,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:16,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-12 12:59:16,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-11-12 12:59:16,465 INFO L87 Difference]: Start difference. First operand 591 states and 663 transitions. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:16,883 INFO L93 Difference]: Finished difference Result 713 states and 803 transitions. [2020-11-12 12:59:16,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-12 12:59:16,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2020-11-12 12:59:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:16,889 INFO L225 Difference]: With dead ends: 713 [2020-11-12 12:59:16,889 INFO L226 Difference]: Without dead ends: 713 [2020-11-12 12:59:16,890 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-11-12 12:59:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-11-12 12:59:16,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 661. [2020-11-12 12:59:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 1.1242424242424243) internal successors, (742), 660 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 742 transitions. [2020-11-12 12:59:16,910 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 742 transitions. Word has length 127 [2020-11-12 12:59:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:16,911 INFO L481 AbstractCegarLoop]: Abstraction has 661 states and 742 transitions. [2020-11-12 12:59:16,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 742 transitions. [2020-11-12 12:59:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-11-12 12:59:16,914 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:16,914 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:17,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:17,128 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:17,129 INFO L82 PathProgramCache]: Analyzing trace with hash -189950034, now seen corresponding path program 9 times [2020-11-12 12:59:17,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:17,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348971404] [2020-11-12 12:59:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:17,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 7 proven. 148 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-12 12:59:17,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348971404] [2020-11-12 12:59:17,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377250778] [2020-11-12 12:59:17,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:17,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-12 12:59:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:17,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-12 12:59:17,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:17,793 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-11-12 12:59:17,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:17,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2020-11-12 12:59:17,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177240953] [2020-11-12 12:59:17,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-12 12:59:17,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:17,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-12 12:59:17,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2020-11-12 12:59:17,796 INFO L87 Difference]: Start difference. First operand 661 states and 742 transitions. Second operand has 28 states, 28 states have (on average 5.571428571428571) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:27,655 INFO L93 Difference]: Finished difference Result 1123 states and 1266 transitions. [2020-11-12 12:59:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 237 states. [2020-11-12 12:59:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.571428571428571) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2020-11-12 12:59:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:27,670 INFO L225 Difference]: With dead ends: 1123 [2020-11-12 12:59:27,670 INFO L226 Difference]: Without dead ends: 1123 [2020-11-12 12:59:27,686 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26020 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=10457, Invalid=51295, Unknown=0, NotChecked=0, Total=61752 [2020-11-12 12:59:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2020-11-12 12:59:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 885. [2020-11-12 12:59:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.1255656108597285) internal successors, (995), 884 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 995 transitions. [2020-11-12 12:59:27,740 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 995 transitions. Word has length 132 [2020-11-12 12:59:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:27,741 INFO L481 AbstractCegarLoop]: Abstraction has 885 states and 995 transitions. [2020-11-12 12:59:27,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.571428571428571) internal successors, (156), 28 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:27,741 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 995 transitions. [2020-11-12 12:59:27,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-12 12:59:27,744 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:27,744 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:27,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:27,958 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:27,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash -628195891, now seen corresponding path program 10 times [2020-11-12 12:59:27,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:27,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100696078] [2020-11-12 12:59:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 9 proven. 189 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-12 12:59:28,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100696078] [2020-11-12 12:59:28,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200680384] [2020-11-12 12:59:28,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:28,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 12:59:28,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-12 12:59:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 9 proven. 189 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-12 12:59:28,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:28,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-11-12 12:59:28,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691585924] [2020-11-12 12:59:28,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-12 12:59:28,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:28,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-12 12:59:28,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-11-12 12:59:28,447 INFO L87 Difference]: Start difference. First operand 885 states and 995 transitions. Second operand has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:28,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:28,993 INFO L93 Difference]: Finished difference Result 1035 states and 1167 transitions. [2020-11-12 12:59:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-12 12:59:28,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2020-11-12 12:59:28,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:28,999 INFO L225 Difference]: With dead ends: 1035 [2020-11-12 12:59:28,999 INFO L226 Difference]: Without dead ends: 1035 [2020-11-12 12:59:29,000 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 12:59:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2020-11-12 12:59:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 971. [2020-11-12 12:59:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.1257731958762887) internal successors, (1092), 970 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1092 transitions. [2020-11-12 12:59:29,024 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1092 transitions. Word has length 145 [2020-11-12 12:59:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:29,024 INFO L481 AbstractCegarLoop]: Abstraction has 971 states and 1092 transitions. [2020-11-12 12:59:29,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.478260869565218) internal successors, (126), 23 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:29,025 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1092 transitions. [2020-11-12 12:59:29,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-11-12 12:59:29,028 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:29,028 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:29,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-12 12:59:29,242 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1141440183, now seen corresponding path program 11 times [2020-11-12 12:59:29,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:29,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137881891] [2020-11-12 12:59:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 235 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-12 12:59:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137881891] [2020-11-12 12:59:29,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431742260] [2020-11-12 12:59:29,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:29,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-12 12:59:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:29,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-12 12:59:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 9 proven. 235 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-12 12:59:29,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:29,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-11-12 12:59:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875646160] [2020-11-12 12:59:29,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-12 12:59:29,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:29,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-12 12:59:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-11-12 12:59:29,891 INFO L87 Difference]: Start difference. First operand 971 states and 1092 transitions. Second operand has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:30,477 INFO L93 Difference]: Finished difference Result 1121 states and 1264 transitions. [2020-11-12 12:59:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-12 12:59:30,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2020-11-12 12:59:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:30,483 INFO L225 Difference]: With dead ends: 1121 [2020-11-12 12:59:30,484 INFO L226 Difference]: Without dead ends: 1121 [2020-11-12 12:59:30,484 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2020-11-12 12:59:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2020-11-12 12:59:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1057. [2020-11-12 12:59:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 1.1259469696969697) internal successors, (1189), 1056 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:30,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1189 transitions. [2020-11-12 12:59:30,514 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1189 transitions. Word has length 150 [2020-11-12 12:59:30,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:30,514 INFO L481 AbstractCegarLoop]: Abstraction has 1057 states and 1189 transitions. [2020-11-12 12:59:30,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.24) internal successors, (131), 25 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1189 transitions. [2020-11-12 12:59:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-11-12 12:59:30,518 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:30,518 INFO L494 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:30,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-12 12:59:30,733 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:30,734 INFO L82 PathProgramCache]: Analyzing trace with hash -637449395, now seen corresponding path program 12 times [2020-11-12 12:59:30,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:30,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716845260] [2020-11-12 12:59:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 9 proven. 286 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-11-12 12:59:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716845260] [2020-11-12 12:59:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538617256] [2020-11-12 12:59:31,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:31,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-12 12:59:31,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-12 12:59:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 11 proven. 85 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-11-12 12:59:31,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:31,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2020-11-12 12:59:31,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705866734] [2020-11-12 12:59:31,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-12 12:59:31,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:31,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-12 12:59:31,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1045, Unknown=0, NotChecked=0, Total=1260 [2020-11-12 12:59:31,667 INFO L87 Difference]: Start difference. First operand 1057 states and 1189 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:54,542 INFO L93 Difference]: Finished difference Result 1646 states and 1856 transitions. [2020-11-12 12:59:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 376 states. [2020-11-12 12:59:54,542 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2020-11-12 12:59:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:54,551 INFO L225 Difference]: With dead ends: 1646 [2020-11-12 12:59:54,551 INFO L226 Difference]: Without dead ends: 1646 [2020-11-12 12:59:54,565 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67672 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=24763, Invalid=128509, Unknown=0, NotChecked=0, Total=153272 [2020-11-12 12:59:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2020-11-12 12:59:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1345. [2020-11-12 12:59:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 1.1264880952380953) internal successors, (1514), 1344 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1514 transitions. [2020-11-12 12:59:54,596 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1514 transitions. Word has length 155 [2020-11-12 12:59:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:54,597 INFO L481 AbstractCegarLoop]: Abstraction has 1345 states and 1514 transitions. [2020-11-12 12:59:54,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1514 transitions. [2020-11-12 12:59:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-11-12 12:59:54,601 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:54,601 INFO L494 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:54,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-12 12:59:54,815 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:54,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:54,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1610285028, now seen corresponding path program 13 times [2020-11-12 12:59:54,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:54,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941201586] [2020-11-12 12:59:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 11 proven. 342 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-12 12:59:55,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941201586] [2020-11-12 12:59:55,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382121806] [2020-11-12 12:59:55,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-12 12:59:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 11 proven. 342 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-12 12:59:55,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:55,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-11-12 12:59:55,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753396973] [2020-11-12 12:59:55,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-12 12:59:55,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-12 12:59:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-11-12 12:59:55,504 INFO L87 Difference]: Start difference. First operand 1345 states and 1514 transitions. Second operand has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:56,351 INFO L93 Difference]: Finished difference Result 1523 states and 1718 transitions. [2020-11-12 12:59:56,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-12 12:59:56,352 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2020-11-12 12:59:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:56,360 INFO L225 Difference]: With dead ends: 1523 [2020-11-12 12:59:56,360 INFO L226 Difference]: Without dead ends: 1523 [2020-11-12 12:59:56,362 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2020-11-12 12:59:56,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2020-11-12 12:59:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 1447. [2020-11-12 12:59:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 1.1265560165975104) internal successors, (1629), 1446 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 1629 transitions. [2020-11-12 12:59:56,411 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 1629 transitions. Word has length 168 [2020-11-12 12:59:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:56,412 INFO L481 AbstractCegarLoop]: Abstraction has 1447 states and 1629 transitions. [2020-11-12 12:59:56,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 1629 transitions. [2020-11-12 12:59:56,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-11-12 12:59:56,416 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:56,417 INFO L494 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:56,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:56,632 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:56,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:56,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1181765864, now seen corresponding path program 14 times [2020-11-12 12:59:56,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:56,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861556609] [2020-11-12 12:59:56,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 11 proven. 403 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-12 12:59:57,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861556609] [2020-11-12 12:59:57,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925745372] [2020-11-12 12:59:57,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:57,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 12:59:57,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:57,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-12 12:59:57,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 12:59:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 11 proven. 403 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-12 12:59:57,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 12:59:57,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-11-12 12:59:57,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708206470] [2020-11-12 12:59:57,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-12 12:59:57,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 12:59:57,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-12 12:59:57,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-12 12:59:57,434 INFO L87 Difference]: Start difference. First operand 1447 states and 1629 transitions. Second operand has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 12:59:58,408 INFO L93 Difference]: Finished difference Result 1625 states and 1833 transitions. [2020-11-12 12:59:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-12 12:59:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2020-11-12 12:59:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 12:59:58,414 INFO L225 Difference]: With dead ends: 1625 [2020-11-12 12:59:58,415 INFO L226 Difference]: Without dead ends: 1625 [2020-11-12 12:59:58,415 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1012, Invalid=2180, Unknown=0, NotChecked=0, Total=3192 [2020-11-12 12:59:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2020-11-12 12:59:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1549. [2020-11-12 12:59:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 1.1266149870801034) internal successors, (1744), 1548 states have internal predecessors, (1744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 1744 transitions. [2020-11-12 12:59:58,451 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 1744 transitions. Word has length 173 [2020-11-12 12:59:58,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 12:59:58,451 INFO L481 AbstractCegarLoop]: Abstraction has 1549 states and 1744 transitions. [2020-11-12 12:59:58,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.709677419354839) internal successors, (146), 31 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 12:59:58,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 1744 transitions. [2020-11-12 12:59:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-11-12 12:59:58,456 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 12:59:58,457 INFO L494 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 12:59:58,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-12 12:59:58,670 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 12:59:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 12:59:58,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1618543204, now seen corresponding path program 15 times [2020-11-12 12:59:58,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 12:59:58,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286352054] [2020-11-12 12:59:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 12:59:58,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 12:59:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 11 proven. 469 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-12 12:59:59,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286352054] [2020-11-12 12:59:59,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160676096] [2020-11-12 12:59:59,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 12:59:59,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-12 12:59:59,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 12:59:59,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-12 12:59:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:00:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 14 proven. 126 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-11-12 13:00:00,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:00:00,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 15] total 44 [2020-11-12 13:00:00,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55185770] [2020-11-12 13:00:00,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-11-12 13:00:00,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:00:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-11-12 13:00:00,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1575, Unknown=0, NotChecked=0, Total=1892 [2020-11-12 13:00:00,052 INFO L87 Difference]: Start difference. First operand 1549 states and 1744 transitions. Second operand has 44 states, 44 states have (on average 4.590909090909091) internal successors, (202), 44 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:00:47,301 INFO L93 Difference]: Finished difference Result 2265 states and 2554 transitions. [2020-11-12 13:00:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 545 states. [2020-11-12 13:00:47,302 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.590909090909091) internal successors, (202), 44 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2020-11-12 13:00:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:00:47,309 INFO L225 Difference]: With dead ends: 2265 [2020-11-12 13:00:47,309 INFO L226 Difference]: Without dead ends: 2265 [2020-11-12 13:00:47,324 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 563 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145034 ImplicationChecksByTransitivity, 46.8s TimeCoverageRelationStatistics Valid=49850, Invalid=268810, Unknown=0, NotChecked=0, Total=318660 [2020-11-12 13:00:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-11-12 13:00:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1901. [2020-11-12 13:00:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1900 states have (on average 1.1268421052631579) internal successors, (2141), 1900 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 2141 transitions. [2020-11-12 13:00:47,367 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 2141 transitions. Word has length 178 [2020-11-12 13:00:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:00:47,367 INFO L481 AbstractCegarLoop]: Abstraction has 1901 states and 2141 transitions. [2020-11-12 13:00:47,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 4.590909090909091) internal successors, (202), 44 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 2141 transitions. [2020-11-12 13:00:47,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-11-12 13:00:47,373 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:00:47,373 INFO L494 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:00:47,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-12 13:00:47,587 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:00:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:00:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash -909563005, now seen corresponding path program 16 times [2020-11-12 13:00:47,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:00:47,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987062641] [2020-11-12 13:00:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:00:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:00:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 13 proven. 540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-11-12 13:00:48,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987062641] [2020-11-12 13:00:48,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654555690] [2020-11-12 13:00:48,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:00:48,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 13:00:48,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:00:48,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-12 13:00:48,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:00:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 13 proven. 540 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-11-12 13:00:48,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:00:48,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2020-11-12 13:00:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048034786] [2020-11-12 13:00:48,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-12 13:00:48,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:00:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-12 13:00:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2020-11-12 13:00:48,761 INFO L87 Difference]: Start difference. First operand 1901 states and 2141 transitions. Second operand has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:50,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:00:50,108 INFO L93 Difference]: Finished difference Result 2107 states and 2377 transitions. [2020-11-12 13:00:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-12 13:00:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2020-11-12 13:00:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:00:50,115 INFO L225 Difference]: With dead ends: 2107 [2020-11-12 13:00:50,115 INFO L226 Difference]: Without dead ends: 2107 [2020-11-12 13:00:50,116 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1316, Invalid=2844, Unknown=0, NotChecked=0, Total=4160 [2020-11-12 13:00:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2107 states. [2020-11-12 13:00:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2107 to 2019. [2020-11-12 13:00:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 1.1268582755203171) internal successors, (2274), 2018 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 2274 transitions. [2020-11-12 13:00:50,155 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 2274 transitions. Word has length 191 [2020-11-12 13:00:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:00:50,155 INFO L481 AbstractCegarLoop]: Abstraction has 2019 states and 2274 transitions. [2020-11-12 13:00:50,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 2274 transitions. [2020-11-12 13:00:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-11-12 13:00:50,161 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:00:50,161 INFO L494 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:00:50,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:00:50,376 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:00:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:00:50,377 INFO L82 PathProgramCache]: Analyzing trace with hash -571542017, now seen corresponding path program 17 times [2020-11-12 13:00:50,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:00:50,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504807233] [2020-11-12 13:00:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:00:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:00:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 13 proven. 616 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-11-12 13:00:51,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504807233] [2020-11-12 13:00:51,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38654442] [2020-11-12 13:00:51,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:00:51,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-12 13:00:51,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:00:51,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-12 13:00:51,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:00:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 13 proven. 616 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-11-12 13:00:51,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:00:51,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2020-11-12 13:00:51,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407360033] [2020-11-12 13:00:51,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-12 13:00:51,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:00:51,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-12 13:00:51,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 13:00:51,621 INFO L87 Difference]: Start difference. First operand 2019 states and 2274 transitions. Second operand has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 37 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:00:53,070 INFO L93 Difference]: Finished difference Result 2225 states and 2510 transitions. [2020-11-12 13:00:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-12 13:00:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 37 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2020-11-12 13:00:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:00:53,078 INFO L225 Difference]: With dead ends: 2225 [2020-11-12 13:00:53,078 INFO L226 Difference]: Without dead ends: 2225 [2020-11-12 13:00:53,078 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1483, Invalid=3209, Unknown=0, NotChecked=0, Total=4692 [2020-11-12 13:00:53,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-11-12 13:00:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2137. [2020-11-12 13:00:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 1.1268726591760299) internal successors, (2407), 2136 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2407 transitions. [2020-11-12 13:00:53,117 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2407 transitions. Word has length 196 [2020-11-12 13:00:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:00:53,118 INFO L481 AbstractCegarLoop]: Abstraction has 2137 states and 2407 transitions. [2020-11-12 13:00:53,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.351351351351352) internal successors, (161), 37 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:00:53,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2407 transitions. [2020-11-12 13:00:53,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-11-12 13:00:53,124 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:00:53,124 INFO L494 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:00:53,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:00:53,338 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:00:53,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:00:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash 527456515, now seen corresponding path program 18 times [2020-11-12 13:00:53,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:00:53,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081125367] [2020-11-12 13:00:53,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:00:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:00:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 13 proven. 697 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-11-12 13:00:54,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081125367] [2020-11-12 13:00:54,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288881818] [2020-11-12 13:00:54,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:00:54,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-12 13:00:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:00:54,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-12 13:00:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:00:55,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-12 13:00:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-11-12 13:00:55,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:00:55,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 20] total 55 [2020-11-12 13:00:55,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495124607] [2020-11-12 13:00:55,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-12 13:00:55,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:00:55,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-12 13:00:55,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=2518, Unknown=0, NotChecked=0, Total=2970 [2020-11-12 13:00:55,585 INFO L87 Difference]: Start difference. First operand 2137 states and 2407 transitions. Second operand has 55 states, 55 states have (on average 4.672727272727273) internal successors, (257), 55 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:05:09,869 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-11-12 13:05:13,166 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-11-12 13:07:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:07:45,312 INFO L93 Difference]: Finished difference Result 27615 states and 31591 transitions. [2020-11-12 13:07:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1728 states. [2020-11-12 13:07:45,316 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.672727272727273) internal successors, (257), 55 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2020-11-12 13:07:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:07:45,409 INFO L225 Difference]: With dead ends: 27615 [2020-11-12 13:07:45,409 INFO L226 Difference]: Without dead ends: 27606 [2020-11-12 13:07:45,574 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 1935 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 1751 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652750 ImplicationChecksByTransitivity, 399.9s TimeCoverageRelationStatistics Valid=481822, Invalid=2589434, Unknown=0, NotChecked=0, Total=3071256 [2020-11-12 13:07:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27606 states. [2020-11-12 13:07:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27606 to 3580. [2020-11-12 13:07:45,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 1.1438949427214307) internal successors, (4094), 3579 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:07:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 4094 transitions. [2020-11-12 13:07:45,797 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 4094 transitions. Word has length 201 [2020-11-12 13:07:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:07:45,797 INFO L481 AbstractCegarLoop]: Abstraction has 3580 states and 4094 transitions. [2020-11-12 13:07:45,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 4.672727272727273) internal successors, (257), 55 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:07:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 4094 transitions. [2020-11-12 13:07:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-11-12 13:07:45,806 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:07:45,807 INFO L494 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:07:46,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:07:46,022 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:07:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:07:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1765568991, now seen corresponding path program 19 times [2020-11-12 13:07:46,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:07:46,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165952012] [2020-11-12 13:07:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:07:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:07:47,221 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-11-12 13:07:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 31 proven. 783 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-12 13:07:48,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165952012] [2020-11-12 13:07:48,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202457845] [2020-11-12 13:07:48,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:07:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:07:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-12 13:07:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:07:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 31 proven. 783 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-12 13:07:48,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:07:48,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2020-11-12 13:07:48,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700461766] [2020-11-12 13:07:48,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-12 13:07:48,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:07:48,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-12 13:07:48,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 13:07:48,745 INFO L87 Difference]: Start difference. First operand 3580 states and 4094 transitions. Second operand has 41 states, 41 states have (on average 4.2439024390243905) internal successors, (174), 41 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:07:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:07:52,211 INFO L93 Difference]: Finished difference Result 3926 states and 4496 transitions. [2020-11-12 13:07:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-12 13:07:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.2439024390243905) internal successors, (174), 41 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2020-11-12 13:07:52,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:07:52,223 INFO L225 Difference]: With dead ends: 3926 [2020-11-12 13:07:52,223 INFO L226 Difference]: Without dead ends: 3926 [2020-11-12 13:07:52,224 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1847, Invalid=4005, Unknown=0, NotChecked=0, Total=5852 [2020-11-12 13:07:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2020-11-12 13:07:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3775. [2020-11-12 13:07:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 3774 states have (on average 1.143879173290938) internal successors, (4317), 3774 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:07:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 4317 transitions. [2020-11-12 13:07:52,288 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 4317 transitions. Word has length 206 [2020-11-12 13:07:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:07:52,288 INFO L481 AbstractCegarLoop]: Abstraction has 3775 states and 4317 transitions. [2020-11-12 13:07:52,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 4.2439024390243905) internal successors, (174), 41 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:07:52,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 4317 transitions. [2020-11-12 13:07:52,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-11-12 13:07:52,299 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:07:52,299 INFO L494 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:07:52,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-12 13:07:52,514 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:07:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:07:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1874328613, now seen corresponding path program 20 times [2020-11-12 13:07:52,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:07:52,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231873722] [2020-11-12 13:07:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:07:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:07:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 31 proven. 874 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-12 13:07:55,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231873722] [2020-11-12 13:07:55,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485260162] [2020-11-12 13:07:55,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:07:55,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-12 13:07:55,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:07:55,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-12 13:07:55,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:07:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 31 proven. 874 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-11-12 13:07:55,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:07:55,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2020-11-12 13:07:55,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640052634] [2020-11-12 13:07:55,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-12 13:07:55,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:07:55,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-12 13:07:55,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2020-11-12 13:07:55,487 INFO L87 Difference]: Start difference. First operand 3775 states and 4317 transitions. Second operand has 43 states, 43 states have (on average 4.162790697674419) internal successors, (179), 43 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:07:59,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:07:59,618 INFO L93 Difference]: Finished difference Result 3970 states and 4540 transitions. [2020-11-12 13:07:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-12 13:07:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.162790697674419) internal successors, (179), 43 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2020-11-12 13:07:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:07:59,632 INFO L225 Difference]: With dead ends: 3970 [2020-11-12 13:07:59,632 INFO L226 Difference]: Without dead ends: 3970 [2020-11-12 13:07:59,633 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2044, Invalid=4436, Unknown=0, NotChecked=0, Total=6480 [2020-11-12 13:07:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2020-11-12 13:07:59,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3970. [2020-11-12 13:07:59,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 3969 states have (on average 1.1438649533887628) internal successors, (4540), 3969 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:07:59,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 4540 transitions. [2020-11-12 13:07:59,698 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 4540 transitions. Word has length 211 [2020-11-12 13:07:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:07:59,698 INFO L481 AbstractCegarLoop]: Abstraction has 3970 states and 4540 transitions. [2020-11-12 13:07:59,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 4.162790697674419) internal successors, (179), 43 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:07:59,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 4540 transitions. [2020-11-12 13:07:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-11-12 13:07:59,709 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:07:59,710 INFO L494 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:07:59,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-12 13:07:59,925 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:07:59,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:07:59,925 INFO L82 PathProgramCache]: Analyzing trace with hash -886329183, now seen corresponding path program 21 times [2020-11-12 13:07:59,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:07:59,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843041221] [2020-11-12 13:07:59,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:07:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:08:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1145 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-11-12 13:08:00,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843041221] [2020-11-12 13:08:00,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251904665] [2020-11-12 13:08:00,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:08:00,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-12 13:08:00,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:08:00,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-12 13:08:00,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:08:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1145 backedges. 20 proven. 175 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-11-12 13:08:02,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:08:02,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2020-11-12 13:08:02,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961873591] [2020-11-12 13:08:02,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-12 13:08:02,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:08:02,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-12 13:08:02,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2020-11-12 13:08:02,016 INFO L87 Difference]: Start difference. First operand 3970 states and 4540 transitions. Second operand has 37 states, 37 states have (on average 6.162162162162162) internal successors, (228), 37 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:09:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-12 13:09:58,256 INFO L93 Difference]: Finished difference Result 40614 states and 46318 transitions. [2020-11-12 13:09:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 605 states. [2020-11-12 13:09:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.162162162162162) internal successors, (228), 37 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2020-11-12 13:09:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-12 13:09:58,308 INFO L225 Difference]: With dead ends: 40614 [2020-11-12 13:09:58,308 INFO L226 Difference]: Without dead ends: 40605 [2020-11-12 13:09:58,334 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 991 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 620 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203678 ImplicationChecksByTransitivity, 113.0s TimeCoverageRelationStatistics Valid=82189, Invalid=304073, Unknown=0, NotChecked=0, Total=386262 [2020-11-12 13:09:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40605 states. [2020-11-12 13:09:58,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40605 to 4528. [2020-11-12 13:09:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 1.1440247404462116) internal successors, (5179), 4527 states have internal predecessors, (5179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:09:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 5179 transitions. [2020-11-12 13:09:58,588 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 5179 transitions. Word has length 216 [2020-11-12 13:09:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-12 13:09:58,589 INFO L481 AbstractCegarLoop]: Abstraction has 4528 states and 5179 transitions. [2020-11-12 13:09:58,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 6.162162162162162) internal successors, (228), 37 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-12 13:09:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 5179 transitions. [2020-11-12 13:09:58,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-11-12 13:09:58,607 INFO L486 BasicCegarLoop]: Found error trace [2020-11-12 13:09:58,608 INFO L494 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-12 13:09:58,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:09:58,823 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-12 13:09:58,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-12 13:09:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash 124761276, now seen corresponding path program 22 times [2020-11-12 13:09:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-12 13:09:58,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728186035] [2020-11-12 13:09:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-12 13:09:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-12 13:09:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 0 proven. 347 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-11-12 13:09:59,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728186035] [2020-11-12 13:09:59,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856349099] [2020-11-12 13:09:59,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-12 13:10:00,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-12 13:10:00,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-12 13:10:00,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-12 13:10:00,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-12 13:10:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1202 backedges. 20 proven. 232 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-11-12 13:10:01,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-12 13:10:01,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 41 [2020-11-12 13:10:01,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210825589] [2020-11-12 13:10:01,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-12 13:10:01,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-12 13:10:01,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-12 13:10:01,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2020-11-12 13:10:01,689 INFO L87 Difference]: Start difference. First operand 4528 states and 5179 transitions. Second operand has 41 states, 41 states have (on average 5.951219512195122) internal successors, (244), 41 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2020-11-12 13:12:16,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 652 states. [2020-11-12 13:12:16,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-12 13:12:16,527 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-12 13:12:16,534 WARN L250 ceAbstractionStarter]: Timeout [2020-11-12 13:12:16,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 01:12:16 BasicIcfg [2020-11-12 13:12:16,534 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-12 13:12:16,535 INFO L168 Benchmark]: Toolchain (without parser) took 793832.57 ms. Allocated memory was 302.0 MB in the beginning and 2.5 GB in the end (delta: 2.2 GB). Free memory was 275.0 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 934.1 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:16,535 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory was 287.6 MB in the beginning and 287.5 MB in the end (delta: 56.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2020-11-12 13:12:16,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1137.43 ms. Allocated memory is still 302.0 MB. Free memory was 274.3 MB in the beginning and 219.2 MB in the end (delta: 55.1 MB). Peak memory consumption was 53.8 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:16,536 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.37 ms. Allocated memory is still 302.0 MB. Free memory was 219.2 MB in the beginning and 217.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:16,536 INFO L168 Benchmark]: Boogie Preprocessor took 68.55 ms. Allocated memory is still 302.0 MB. Free memory was 217.2 MB in the beginning and 215.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:16,537 INFO L168 Benchmark]: RCFGBuilder took 685.83 ms. Allocated memory was 302.0 MB in the beginning and 362.8 MB in the end (delta: 60.8 MB). Free memory was 215.1 MB in the beginning and 328.2 MB in the end (delta: -113.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:16,537 INFO L168 Benchmark]: TraceAbstraction took 791823.39 ms. Allocated memory was 362.8 MB in the beginning and 2.5 GB in the end (delta: 2.1 GB). Free memory was 327.2 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 924.3 MB. Max. memory is 16.0 GB. [2020-11-12 13:12:16,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 302.0 MB. Free memory was 287.6 MB in the beginning and 287.5 MB in the end (delta: 56.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 1137.43 ms. Allocated memory is still 302.0 MB. Free memory was 274.3 MB in the beginning and 219.2 MB in the end (delta: 55.1 MB). Peak memory consumption was 53.8 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 104.37 ms. Allocated memory is still 302.0 MB. Free memory was 219.2 MB in the beginning and 217.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 68.55 ms. Allocated memory is still 302.0 MB. Free memory was 217.2 MB in the beginning and 215.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 685.83 ms. Allocated memory was 302.0 MB in the beginning and 362.8 MB in the end (delta: 60.8 MB). Free memory was 215.1 MB in the beginning and 328.2 MB in the end (delta: -113.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 791823.39 ms. Allocated memory was 362.8 MB in the beginning and 2.5 GB in the end (delta: 2.1 GB). Free memory was 327.2 MB in the beginning and 1.5 GB in the end (delta: -1.2 GB). Peak memory consumption was 924.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (4528states) and FLOYD_HOARE automaton (currently 652 states, 41 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 678 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 87 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 791.6s, OverallIterations: 25, TraceHistogramMax: 20, AutomataDifference: 759.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 1774 SDtfs, 24712 SDslu, 25107 SDs, 0 SdLazy, 4923 SolverSat, 6803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8910 GetRequests, 3894 SyntacticMatches, 0 SemanticMatches, 5015 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346197 ImplicationChecksByTransitivity, 747.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4528occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 24 MinimizatonAttempts, 62188 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 6938 NumberOfCodeBlocks, 6748 NumberOfCodeBlocksAsserted, 125 NumberOfCheckSat, 6890 ConstructedInterpolants, 0 QuantifiedInterpolants, 2244776 SizeOfPredicates, 377 NumberOfNonLiveVariables, 7035 ConjunctsInSsa, 407 ConjunctsInUnsatCore, 48 InterpolantComputations, 3 PerfectInterpolantSequences, 8347/20004 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown