/usr/bin/java -Xmx8000000000 -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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 13:01:19,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 13:01:19,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 13:01:19,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 13:01:19,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 13:01:19,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 13:01:19,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 13:01:19,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 13:01:19,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 13:01:19,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 13:01:19,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 13:01:19,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 13:01:19,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 13:01:19,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 13:01:19,169 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 13:01:19,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 13:01:19,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 13:01:19,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 13:01:19,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 13:01:19,189 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 13:01:19,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 13:01:19,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 13:01:19,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 13:01:19,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 13:01:19,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-09 13:01:19,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 13:01:19,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 13:01:19,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 13:01:19,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 13:01:19,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 13:01:19,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 13:01:19,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 13:01:19,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 13:01:19,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 13:01:19,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 13:01:19,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 13:01:19,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-09 13:01:19,278 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 13:01:19,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 13:01:19,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 13:01:19,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 13:01:19,284 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 13:01:19,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 13:01:19,285 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 13:01:19,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 13:01:19,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 13:01:19,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 13:01:19,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 13:01:19,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 13:01:19,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 13:01:19,287 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 13:01:19,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 13:01:19,288 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 13:01:19,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 13:01:19,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 13:01:19,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 13:01:19,289 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 13:01:19,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 13:01:19,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 13:01:19,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 13:01:19,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-09 13:01:19,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 13:01:19,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 13:01:19,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 13:01:19,290 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 13:01:19,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-09 13:01:19,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 13:01:19,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 13:01:19,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 13:01:19,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 13:01:19,749 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 13:01:19,749 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 13:01:19,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-11-09 13:01:19,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba9bffac/91c5fb44639e4ea0af5b31ee667beb72/FLAG356013f4f [2020-11-09 13:01:20,720 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 13:01:20,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-11-09 13:01:20,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba9bffac/91c5fb44639e4ea0af5b31ee667beb72/FLAG356013f4f [2020-11-09 13:01:20,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ba9bffac/91c5fb44639e4ea0af5b31ee667beb72 [2020-11-09 13:01:20,893 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 13:01:20,900 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 13:01:20,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 13:01:20,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 13:01:20,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 13:01:20,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:01:20" (1/1) ... [2020-11-09 13:01:20,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc22230 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:20, skipping insertion in model container [2020-11-09 13:01:20,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:01:20" (1/1) ... [2020-11-09 13:01:20,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 13:01:21,002 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 13:01:21,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:01:21,689 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 13:01:21,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 13:01:22,028 INFO L208 MainTranslator]: Completed translation [2020-11-09 13:01:22,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22 WrapperNode [2020-11-09 13:01:22,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 13:01:22,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 13:01:22,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 13:01:22,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 13:01:22,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 13:01:22,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 13:01:22,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 13:01:22,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 13:01:22,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (1/1) ... [2020-11-09 13:01:22,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 13:01:22,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 13:01:22,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 13:01:22,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 13:01:22,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (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 [2020-11-09 13:01:22,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 13:01:22,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 13:01:22,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-09 13:01:22,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-11-09 13:01:22,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-11-09 13:01:22,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 13:01:22,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 13:01:22,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 13:01:22,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 13:01:22,253 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 13:01:23,113 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 13:01:23,113 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-09 13:01:23,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:01:23 BoogieIcfgContainer [2020-11-09 13:01:23,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 13:01:23,118 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 13:01:23,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 13:01:23,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 13:01:23,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:01:20" (1/3) ... [2020-11-09 13:01:23,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b01eae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:01:23, skipping insertion in model container [2020-11-09 13:01:23,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:01:22" (2/3) ... [2020-11-09 13:01:23,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b01eae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:01:23, skipping insertion in model container [2020-11-09 13:01:23,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:01:23" (3/3) ... [2020-11-09 13:01:23,126 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-11-09 13:01:23,160 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 13:01:23,160 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-09 13:01:23,165 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 13:01:23,166 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 13:01:23,197 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,198 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,198 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,198 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,198 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,199 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,199 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,199 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,199 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,200 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,200 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,200 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,200 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,201 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,201 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,201 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,201 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,202 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,202 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,202 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,202 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,203 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,203 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,203 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,203 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,204 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,204 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,204 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,204 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,205 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,205 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,205 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,205 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,206 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,206 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,206 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,206 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,206 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,207 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,207 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,207 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,207 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,210 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,210 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,211 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,211 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,211 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,211 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,212 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,212 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 13:01:23,227 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-11-09 13:01:23,240 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-09 13:01:23,262 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 13:01:23,262 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 13:01:23,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-09 13:01:23,263 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-09 13:01:23,263 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 13:01:23,263 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 13:01:23,263 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 13:01:23,263 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 13:01:23,278 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-09 13:01:23,280 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 94 transitions, 196 flow [2020-11-09 13:01:23,284 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 94 transitions, 196 flow [2020-11-09 13:01:23,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 94 transitions, 196 flow [2020-11-09 13:01:23,342 INFO L129 PetriNetUnfolder]: 8/93 cut-off events. [2020-11-09 13:01:23,342 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-11-09 13:01:23,347 INFO L84 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 93 events. 8/93 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 74 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-11-09 13:01:23,349 INFO L116 LiptonReduction]: Number of co-enabled transitions 640 [2020-11-09 13:01:25,172 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-11-09 13:01:26,985 WARN L194 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-09 13:01:27,204 WARN L194 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-09 13:01:27,443 WARN L194 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-11-09 13:01:27,694 WARN L194 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-11-09 13:01:28,533 WARN L194 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2020-11-09 13:01:28,780 WARN L194 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-09 13:01:29,306 WARN L194 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2020-11-09 13:01:29,632 WARN L194 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-11-09 13:01:31,415 WARN L194 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2020-11-09 13:01:32,234 WARN L194 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-11-09 13:01:34,041 WARN L194 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2020-11-09 13:01:34,907 WARN L194 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-11-09 13:01:37,475 WARN L194 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 158 DAG size of output: 156 [2020-11-09 13:01:38,815 WARN L194 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 149 [2020-11-09 13:01:41,686 WARN L194 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 158 DAG size of output: 156 [2020-11-09 13:01:43,039 WARN L194 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 149 [2020-11-09 13:01:43,042 INFO L131 LiptonReduction]: Checked pairs total: 527 [2020-11-09 13:01:43,043 INFO L133 LiptonReduction]: Total number of compositions: 97 [2020-11-09 13:01:43,053 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-11-09 13:01:43,063 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-11-09 13:01:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-09 13:01:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 13:01:43,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:43,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:43,072 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:43,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:43,079 INFO L82 PathProgramCache]: Analyzing trace with hash -298314605, now seen corresponding path program 1 times [2020-11-09 13:01:43,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:43,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316331874] [2020-11-09 13:01:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:01:43,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316331874] [2020-11-09 13:01:43,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 13:01:43,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 13:01:43,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110639042] [2020-11-09 13:01:43,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-09 13:01:43,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:43,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-09 13:01:43,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-09 13:01:43,496 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-11-09 13:01:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:43,545 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-11-09 13:01:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-09 13:01:43,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-09 13:01:43,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:43,559 INFO L225 Difference]: With dead ends: 20 [2020-11-09 13:01:43,559 INFO L226 Difference]: Without dead ends: 20 [2020-11-09 13:01:43,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-09 13:01:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-09 13:01:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-09 13:01:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-09 13:01:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-11-09 13:01:43,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-11-09 13:01:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:43,600 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-11-09 13:01:43,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-09 13:01:43,600 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-11-09 13:01:43,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-09 13:01:43,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:43,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:43,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 13:01:43,601 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:43,602 INFO L82 PathProgramCache]: Analyzing trace with hash -627794206, now seen corresponding path program 1 times [2020-11-09 13:01:43,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:43,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867557834] [2020-11-09 13:01:43,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:01:43,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867557834] [2020-11-09 13:01:43,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512338645] [2020-11-09 13:01:43,671 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 [2020-11-09 13:01:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:43,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-09 13:01:43,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-09 13:01:43,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-09 13:01:43,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-11-09 13:01:43,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681271713] [2020-11-09 13:01:43,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-09 13:01:43,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:43,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-09 13:01:43,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:01:43,951 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-11-09 13:01:44,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:44,035 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-11-09 13:01:44,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-09 13:01:44,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-09 13:01:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:44,037 INFO L225 Difference]: With dead ends: 28 [2020-11-09 13:01:44,038 INFO L226 Difference]: Without dead ends: 28 [2020-11-09 13:01:44,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-09 13:01:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-09 13:01:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-11-09 13:01:44,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-09 13:01:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-11-09 13:01:44,051 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-11-09 13:01:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:44,052 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-11-09 13:01:44,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-09 13:01:44,052 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-11-09 13:01:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 13:01:44,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:44,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:44,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-09 13:01:44,267 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash -504151928, now seen corresponding path program 1 times [2020-11-09 13:01:44,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:44,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672512731] [2020-11-09 13:01:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:01:44,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672512731] [2020-11-09 13:01:44,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337373242] [2020-11-09 13:01:44,424 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 [2020-11-09 13:01:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:44,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-09 13:01:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-09 13:01:44,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:44,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-11-09 13:01:44,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33727108] [2020-11-09 13:01:44,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:01:44,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:01:44,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:01:44,533 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-11-09 13:01:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:44,698 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-11-09 13:01:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-09 13:01:44,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-09 13:01:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:44,701 INFO L225 Difference]: With dead ends: 44 [2020-11-09 13:01:44,701 INFO L226 Difference]: Without dead ends: 44 [2020-11-09 13:01:44,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-09 13:01:44,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-09 13:01:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-11-09 13:01:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-09 13:01:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-11-09 13:01:44,709 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-11-09 13:01:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:44,709 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-11-09 13:01:44,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:01:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-11-09 13:01:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 13:01:44,710 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:44,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:44,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:44,912 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:44,913 INFO L82 PathProgramCache]: Analyzing trace with hash -73652697, now seen corresponding path program 2 times [2020-11-09 13:01:44,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:44,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304624937] [2020-11-09 13:01:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-09 13:01:44,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304624937] [2020-11-09 13:01:44,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230365021] [2020-11-09 13:01:44,979 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 [2020-11-09 13:01:45,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:01:45,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:45,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-09 13:01:45,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-09 13:01:45,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:45,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 13:01:45,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374996329] [2020-11-09 13:01:45,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-09 13:01:45,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-09 13:01:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:01:45,110 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-11-09 13:01:45,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:45,143 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-11-09 13:01:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 13:01:45,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-09 13:01:45,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:45,146 INFO L225 Difference]: With dead ends: 54 [2020-11-09 13:01:45,146 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 13:01:45,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-09 13:01:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 13:01:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-11-09 13:01:45,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 13:01:45,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-11-09 13:01:45,154 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-11-09 13:01:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:45,155 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-11-09 13:01:45,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-09 13:01:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-11-09 13:01:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 13:01:45,156 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:45,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:45,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:45,369 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:45,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1233216447, now seen corresponding path program 3 times [2020-11-09 13:01:45,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:45,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022519963] [2020-11-09 13:01:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-09 13:01:45,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022519963] [2020-11-09 13:01:45,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265945640] [2020-11-09 13:01:45,514 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 [2020-11-09 13:01:45,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 13:01:45,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:45,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-09 13:01:45,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-09 13:01:45,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:45,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-11-09 13:01:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165840432] [2020-11-09 13:01:45,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 13:01:45,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 13:01:45,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-09 13:01:45,692 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-11-09 13:01:46,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:46,054 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-11-09 13:01:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 13:01:46,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-11-09 13:01:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:46,057 INFO L225 Difference]: With dead ends: 76 [2020-11-09 13:01:46,057 INFO L226 Difference]: Without dead ends: 76 [2020-11-09 13:01:46,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:01:46,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-09 13:01:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-11-09 13:01:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 13:01:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-11-09 13:01:46,066 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-11-09 13:01:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:46,067 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-11-09 13:01:46,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 13:01:46,067 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-11-09 13:01:46,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 13:01:46,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:46,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:46,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:46,284 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash 313305242, now seen corresponding path program 4 times [2020-11-09 13:01:46,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:46,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186047706] [2020-11-09 13:01:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-09 13:01:46,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186047706] [2020-11-09 13:01:46,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183139388] [2020-11-09 13:01:46,421 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 [2020-11-09 13:01:46,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:01:46,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:46,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-09 13:01:46,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-09 13:01:46,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:46,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 13:01:46,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117005005] [2020-11-09 13:01:46,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 13:01:46,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:46,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 13:01:46,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:01:46,576 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 8 states. [2020-11-09 13:01:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:46,630 INFO L93 Difference]: Finished difference Result 88 states and 172 transitions. [2020-11-09 13:01:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 13:01:46,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-11-09 13:01:46,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:46,633 INFO L225 Difference]: With dead ends: 88 [2020-11-09 13:01:46,633 INFO L226 Difference]: Without dead ends: 88 [2020-11-09 13:01:46,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-09 13:01:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-09 13:01:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-11-09 13:01:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 13:01:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 160 transitions. [2020-11-09 13:01:46,656 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 160 transitions. Word has length 19 [2020-11-09 13:01:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:46,656 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 160 transitions. [2020-11-09 13:01:46,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 13:01:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 160 transitions. [2020-11-09 13:01:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 13:01:46,663 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:46,663 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:46,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-09 13:01:46,876 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1564603072, now seen corresponding path program 5 times [2020-11-09 13:01:46,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:46,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416336835] [2020-11-09 13:01:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:46,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-09 13:01:47,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416336835] [2020-11-09 13:01:47,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981417978] [2020-11-09 13:01:47,021 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 [2020-11-09 13:01:47,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-09 13:01:47,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-09 13:01:47,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-09 13:01:47,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:47,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-11-09 13:01:47,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690600966] [2020-11-09 13:01:47,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:01:47,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:47,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:01:47,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:01:47,185 INFO L87 Difference]: Start difference. First operand 82 states and 160 transitions. Second operand 12 states. [2020-11-09 13:01:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:47,887 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2020-11-09 13:01:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 13:01:47,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-11-09 13:01:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:47,891 INFO L225 Difference]: With dead ends: 116 [2020-11-09 13:01:47,891 INFO L226 Difference]: Without dead ends: 116 [2020-11-09 13:01:47,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 13:01:47,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-09 13:01:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-11-09 13:01:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 13:01:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 214 transitions. [2020-11-09 13:01:47,922 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 214 transitions. Word has length 21 [2020-11-09 13:01:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:47,922 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 214 transitions. [2020-11-09 13:01:47,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:01:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 214 transitions. [2020-11-09 13:01:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 13:01:47,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:47,924 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:48,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:48,125 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:48,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1614396817, now seen corresponding path program 6 times [2020-11-09 13:01:48,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:48,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951171655] [2020-11-09 13:01:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-09 13:01:48,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951171655] [2020-11-09 13:01:48,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670192806] [2020-11-09 13:01:48,304 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 [2020-11-09 13:01:48,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 13:01:48,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:48,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-09 13:01:48,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-09 13:01:48,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:48,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-11-09 13:01:48,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741537301] [2020-11-09 13:01:48,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:01:48,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:48,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:01:48,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:01:48,530 INFO L87 Difference]: Start difference. First operand 109 states and 214 transitions. Second operand 14 states. [2020-11-09 13:01:49,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:49,657 INFO L93 Difference]: Finished difference Result 148 states and 292 transitions. [2020-11-09 13:01:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-11-09 13:01:49,658 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-11-09 13:01:49,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:49,659 INFO L225 Difference]: With dead ends: 148 [2020-11-09 13:01:49,659 INFO L226 Difference]: Without dead ends: 148 [2020-11-09 13:01:49,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 13:01:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-09 13:01:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2020-11-09 13:01:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-09 13:01:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 276 transitions. [2020-11-09 13:01:49,671 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 276 transitions. Word has length 24 [2020-11-09 13:01:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:49,671 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 276 transitions. [2020-11-09 13:01:49,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:01:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 276 transitions. [2020-11-09 13:01:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 13:01:49,673 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:49,673 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:49,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:49,887 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:49,888 INFO L82 PathProgramCache]: Analyzing trace with hash 149865004, now seen corresponding path program 7 times [2020-11-09 13:01:49,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:49,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817626114] [2020-11-09 13:01:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-09 13:01:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817626114] [2020-11-09 13:01:50,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051293188] [2020-11-09 13:01:50,009 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 [2020-11-09 13:01:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:50,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:01:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-09 13:01:50,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:50,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 13:01:50,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854388547] [2020-11-09 13:01:50,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 13:01:50,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:50,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 13:01:50,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:01:50,147 INFO L87 Difference]: Start difference. First operand 140 states and 276 transitions. Second operand 11 states. [2020-11-09 13:01:50,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:50,196 INFO L93 Difference]: Finished difference Result 164 states and 324 transitions. [2020-11-09 13:01:50,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-09 13:01:50,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-11-09 13:01:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:50,199 INFO L225 Difference]: With dead ends: 164 [2020-11-09 13:01:50,199 INFO L226 Difference]: Without dead ends: 164 [2020-11-09 13:01:50,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-09 13:01:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-11-09 13:01:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2020-11-09 13:01:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-09 13:01:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 308 transitions. [2020-11-09 13:01:50,209 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 308 transitions. Word has length 27 [2020-11-09 13:01:50,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:50,209 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 308 transitions. [2020-11-09 13:01:50,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 13:01:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 308 transitions. [2020-11-09 13:01:50,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 13:01:50,211 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:50,211 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:50,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-09 13:01:50,427 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1195211182, now seen corresponding path program 8 times [2020-11-09 13:01:50,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:50,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124717167] [2020-11-09 13:01:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-09 13:01:50,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124717167] [2020-11-09 13:01:50,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302046754] [2020-11-09 13:01:50,556 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 [2020-11-09 13:01:50,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:01:50,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:50,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:01:50,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-09 13:01:50,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:50,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 13:01:50,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619005841] [2020-11-09 13:01:50,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 13:01:50,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 13:01:50,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:01:50,684 INFO L87 Difference]: Start difference. First operand 156 states and 308 transitions. Second operand 12 states. [2020-11-09 13:01:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:50,750 INFO L93 Difference]: Finished difference Result 180 states and 356 transitions. [2020-11-09 13:01:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 13:01:50,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-11-09 13:01:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:50,755 INFO L225 Difference]: With dead ends: 180 [2020-11-09 13:01:50,755 INFO L226 Difference]: Without dead ends: 180 [2020-11-09 13:01:50,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-09 13:01:50,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-11-09 13:01:50,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-11-09 13:01:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-11-09 13:01:50,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 340 transitions. [2020-11-09 13:01:50,774 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 340 transitions. Word has length 29 [2020-11-09 13:01:50,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:50,774 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 340 transitions. [2020-11-09 13:01:50,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 13:01:50,774 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 340 transitions. [2020-11-09 13:01:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 13:01:50,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:50,776 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:50,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:50,990 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:50,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1028269832, now seen corresponding path program 9 times [2020-11-09 13:01:50,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:50,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489148643] [2020-11-09 13:01:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-09 13:01:51,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489148643] [2020-11-09 13:01:51,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68345611] [2020-11-09 13:01:51,168 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 [2020-11-09 13:01:51,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 13:01:51,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:51,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 13:01:51,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:51,393 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-11-09 13:01:51,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:51,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-11-09 13:01:51,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871343422] [2020-11-09 13:01:51,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:01:51,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:51,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:01:51,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:01:51,395 INFO L87 Difference]: Start difference. First operand 172 states and 340 transitions. Second operand 18 states. [2020-11-09 13:01:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:53,555 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2020-11-09 13:01:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-09 13:01:53,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-11-09 13:01:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:53,567 INFO L225 Difference]: With dead ends: 220 [2020-11-09 13:01:53,567 INFO L226 Difference]: Without dead ends: 220 [2020-11-09 13:01:53,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1848, Invalid=4158, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 13:01:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-09 13:01:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2020-11-09 13:01:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-11-09 13:01:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 418 transitions. [2020-11-09 13:01:53,577 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 418 transitions. Word has length 31 [2020-11-09 13:01:53,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:53,578 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 418 transitions. [2020-11-09 13:01:53,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:01:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 418 transitions. [2020-11-09 13:01:53,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 13:01:53,584 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:53,584 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:53,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:01:53,790 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:53,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:53,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2003940681, now seen corresponding path program 10 times [2020-11-09 13:01:53,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:53,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236933373] [2020-11-09 13:01:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-09 13:01:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236933373] [2020-11-09 13:01:53,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985184404] [2020-11-09 13:01:53,964 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 [2020-11-09 13:01:54,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:01:54,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:01:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-09 13:01:54,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:54,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 13:01:54,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403189252] [2020-11-09 13:01:54,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 13:01:54,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:54,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 13:01:54,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:01:54,084 INFO L87 Difference]: Start difference. First operand 211 states and 418 transitions. Second operand 14 states. [2020-11-09 13:01:54,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:54,157 INFO L93 Difference]: Finished difference Result 238 states and 472 transitions. [2020-11-09 13:01:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 13:01:54,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-11-09 13:01:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:54,161 INFO L225 Difference]: With dead ends: 238 [2020-11-09 13:01:54,161 INFO L226 Difference]: Without dead ends: 238 [2020-11-09 13:01:54,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-11-09 13:01:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-09 13:01:54,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 229. [2020-11-09 13:01:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-11-09 13:01:54,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 454 transitions. [2020-11-09 13:01:54,168 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 454 transitions. Word has length 34 [2020-11-09 13:01:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:54,169 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 454 transitions. [2020-11-09 13:01:54,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 13:01:54,169 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 454 transitions. [2020-11-09 13:01:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 13:01:54,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:54,174 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:54,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-09 13:01:54,389 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:54,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:54,390 INFO L82 PathProgramCache]: Analyzing trace with hash -954028079, now seen corresponding path program 11 times [2020-11-09 13:01:54,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:54,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414994615] [2020-11-09 13:01:54,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-11-09 13:01:54,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414994615] [2020-11-09 13:01:54,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726467902] [2020-11-09 13:01:54,588 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 [2020-11-09 13:01:54,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-09 13:01:54,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 13:01:54,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-11-09 13:01:54,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:54,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-11-09 13:01:54,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674126588] [2020-11-09 13:01:54,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 13:01:54,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:54,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 13:01:54,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-11-09 13:01:54,816 INFO L87 Difference]: Start difference. First operand 229 states and 454 transitions. Second operand 21 states. [2020-11-09 13:01:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:01:58,312 INFO L93 Difference]: Finished difference Result 284 states and 564 transitions. [2020-11-09 13:01:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-11-09 13:01:58,313 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-11-09 13:01:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:01:58,314 INFO L225 Difference]: With dead ends: 284 [2020-11-09 13:01:58,315 INFO L226 Difference]: Without dead ends: 284 [2020-11-09 13:01:58,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3276, Invalid=7644, Unknown=0, NotChecked=0, Total=10920 [2020-11-09 13:01:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-11-09 13:01:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 274. [2020-11-09 13:01:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-11-09 13:01:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 544 transitions. [2020-11-09 13:01:58,328 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 544 transitions. Word has length 36 [2020-11-09 13:01:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:01:58,328 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 544 transitions. [2020-11-09 13:01:58,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 13:01:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 544 transitions. [2020-11-09 13:01:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 13:01:58,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:01:58,330 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:01:58,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-09 13:01:58,545 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:01:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:01:58,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1780566006, now seen corresponding path program 12 times [2020-11-09 13:01:58,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:01:58,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220211244] [2020-11-09 13:01:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:01:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:01:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-09 13:01:58,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220211244] [2020-11-09 13:01:58,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707905825] [2020-11-09 13:01:58,746 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 [2020-11-09 13:01:58,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-09 13:01:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:01:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 13:01:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:01:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-09 13:01:59,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:01:59,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2020-11-09 13:01:59,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686978392] [2020-11-09 13:01:59,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:01:59,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:01:59,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:01:59,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:01:59,051 INFO L87 Difference]: Start difference. First operand 274 states and 544 transitions. Second operand 23 states. [2020-11-09 13:02:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:03,903 INFO L93 Difference]: Finished difference Result 334 states and 664 transitions. [2020-11-09 13:02:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-11-09 13:02:03,904 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-11-09 13:02:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:03,907 INFO L225 Difference]: With dead ends: 334 [2020-11-09 13:02:03,907 INFO L226 Difference]: Without dead ends: 334 [2020-11-09 13:02:03,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4725, Invalid=11277, Unknown=0, NotChecked=0, Total=16002 [2020-11-09 13:02:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-09 13:02:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 323. [2020-11-09 13:02:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-11-09 13:02:03,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 642 transitions. [2020-11-09 13:02:03,921 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 642 transitions. Word has length 39 [2020-11-09 13:02:03,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:03,922 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 642 transitions. [2020-11-09 13:02:03,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:02:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 642 transitions. [2020-11-09 13:02:03,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 13:02:03,923 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:03,923 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:04,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-09 13:02:04,139 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:04,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:04,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1545147365, now seen corresponding path program 13 times [2020-11-09 13:02:04,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:04,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193013172] [2020-11-09 13:02:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-09 13:02:04,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193013172] [2020-11-09 13:02:04,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017863631] [2020-11-09 13:02:04,382 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 [2020-11-09 13:02:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 13:02:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-09 13:02:04,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:04,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 13:02:04,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8242310] [2020-11-09 13:02:04,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 13:02:04,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:04,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 13:02:04,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:02:04,520 INFO L87 Difference]: Start difference. First operand 323 states and 642 transitions. Second operand 17 states. [2020-11-09 13:02:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:04,612 INFO L93 Difference]: Finished difference Result 356 states and 708 transitions. [2020-11-09 13:02:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 13:02:04,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-11-09 13:02:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:04,616 INFO L225 Difference]: With dead ends: 356 [2020-11-09 13:02:04,616 INFO L226 Difference]: Without dead ends: 356 [2020-11-09 13:02:04,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-11-09 13:02:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-11-09 13:02:04,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 345. [2020-11-09 13:02:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-11-09 13:02:04,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 686 transitions. [2020-11-09 13:02:04,626 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 686 transitions. Word has length 42 [2020-11-09 13:02:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:04,627 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 686 transitions. [2020-11-09 13:02:04,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 13:02:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 686 transitions. [2020-11-09 13:02:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 13:02:04,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:04,628 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:04,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:04,842 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:04,843 INFO L82 PathProgramCache]: Analyzing trace with hash -714359041, now seen corresponding path program 14 times [2020-11-09 13:02:04,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:04,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226553150] [2020-11-09 13:02:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-09 13:02:05,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226553150] [2020-11-09 13:02:05,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259271346] [2020-11-09 13:02:05,113 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 [2020-11-09 13:02:05,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:02:05,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:05,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 13:02:05,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-09 13:02:05,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:05,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 13:02:05,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524559989] [2020-11-09 13:02:05,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 13:02:05,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:05,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 13:02:05,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:02:05,255 INFO L87 Difference]: Start difference. First operand 345 states and 686 transitions. Second operand 18 states. [2020-11-09 13:02:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:05,348 INFO L93 Difference]: Finished difference Result 378 states and 752 transitions. [2020-11-09 13:02:05,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 13:02:05,350 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-11-09 13:02:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:05,353 INFO L225 Difference]: With dead ends: 378 [2020-11-09 13:02:05,353 INFO L226 Difference]: Without dead ends: 378 [2020-11-09 13:02:05,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-11-09 13:02:05,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-11-09 13:02:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2020-11-09 13:02:05,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-11-09 13:02:05,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 730 transitions. [2020-11-09 13:02:05,365 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 730 transitions. Word has length 44 [2020-11-09 13:02:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:05,365 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 730 transitions. [2020-11-09 13:02:05,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 13:02:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 730 transitions. [2020-11-09 13:02:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 13:02:05,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:05,367 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:05,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 13:02:05,581 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1153436569, now seen corresponding path program 15 times [2020-11-09 13:02:05,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:05,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934082211] [2020-11-09 13:02:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-09 13:02:05,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934082211] [2020-11-09 13:02:05,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132235066] [2020-11-09 13:02:05,884 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 [2020-11-09 13:02:05,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 13:02:05,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:05,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 13:02:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-11-09 13:02:06,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:06,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2020-11-09 13:02:06,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106234203] [2020-11-09 13:02:06,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 13:02:06,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:06,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 13:02:06,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-11-09 13:02:06,276 INFO L87 Difference]: Start difference. First operand 367 states and 730 transitions. Second operand 27 states. [2020-11-09 13:02:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:14,603 INFO L93 Difference]: Finished difference Result 436 states and 868 transitions. [2020-11-09 13:02:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2020-11-09 13:02:14,609 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2020-11-09 13:02:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:14,611 INFO L225 Difference]: With dead ends: 436 [2020-11-09 13:02:14,612 INFO L226 Difference]: Without dead ends: 436 [2020-11-09 13:02:14,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10431 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=8415, Invalid=20655, Unknown=0, NotChecked=0, Total=29070 [2020-11-09 13:02:14,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-11-09 13:02:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 424. [2020-11-09 13:02:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-11-09 13:02:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 844 transitions. [2020-11-09 13:02:14,630 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 844 transitions. Word has length 46 [2020-11-09 13:02:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:14,631 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 844 transitions. [2020-11-09 13:02:14,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 13:02:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 844 transitions. [2020-11-09 13:02:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-09 13:02:14,632 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:14,632 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:14,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 13:02:14,848 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:14,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:14,849 INFO L82 PathProgramCache]: Analyzing trace with hash -670450238, now seen corresponding path program 16 times [2020-11-09 13:02:14,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:14,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787347005] [2020-11-09 13:02:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-09 13:02:15,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787347005] [2020-11-09 13:02:15,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648400021] [2020-11-09 13:02:15,162 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 [2020-11-09 13:02:15,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 13:02:15,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 13:02:15,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-09 13:02:15,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:15,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 13:02:15,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983272173] [2020-11-09 13:02:15,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 13:02:15,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:15,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 13:02:15,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:02:15,314 INFO L87 Difference]: Start difference. First operand 424 states and 844 transitions. Second operand 20 states. [2020-11-09 13:02:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:15,447 INFO L93 Difference]: Finished difference Result 460 states and 916 transitions. [2020-11-09 13:02:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 13:02:15,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-11-09 13:02:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:15,453 INFO L225 Difference]: With dead ends: 460 [2020-11-09 13:02:15,454 INFO L226 Difference]: Without dead ends: 460 [2020-11-09 13:02:15,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-11-09 13:02:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-11-09 13:02:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 448. [2020-11-09 13:02:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-11-09 13:02:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 892 transitions. [2020-11-09 13:02:15,466 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 892 transitions. Word has length 49 [2020-11-09 13:02:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:15,466 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 892 transitions. [2020-11-09 13:02:15,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 13:02:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 892 transitions. [2020-11-09 13:02:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-09 13:02:15,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:15,468 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:15,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-09 13:02:15,682 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1806745240, now seen corresponding path program 17 times [2020-11-09 13:02:15,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:15,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51454484] [2020-11-09 13:02:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:15,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-09 13:02:16,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51454484] [2020-11-09 13:02:16,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825714509] [2020-11-09 13:02:16,029 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 [2020-11-09 13:02:16,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-11-09 13:02:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:16,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 13:02:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-11-09 13:02:16,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:16,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2020-11-09 13:02:16,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875145736] [2020-11-09 13:02:16,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 13:02:16,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 13:02:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=615, Unknown=0, NotChecked=0, Total=870 [2020-11-09 13:02:16,380 INFO L87 Difference]: Start difference. First operand 448 states and 892 transitions. Second operand 30 states. [2020-11-09 13:02:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:28,647 INFO L93 Difference]: Finished difference Result 524 states and 1044 transitions. [2020-11-09 13:02:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2020-11-09 13:02:28,649 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 51 [2020-11-09 13:02:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:28,652 INFO L225 Difference]: With dead ends: 524 [2020-11-09 13:02:28,652 INFO L226 Difference]: Without dead ends: 524 [2020-11-09 13:02:28,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16280 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=12540, Invalid=31350, Unknown=0, NotChecked=0, Total=43890 [2020-11-09 13:02:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-11-09 13:02:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 511. [2020-11-09 13:02:28,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-11-09 13:02:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1018 transitions. [2020-11-09 13:02:28,669 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1018 transitions. Word has length 51 [2020-11-09 13:02:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:28,669 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 1018 transitions. [2020-11-09 13:02:28,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 13:02:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1018 transitions. [2020-11-09 13:02:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-11-09 13:02:28,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:28,671 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:28,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:28,886 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:28,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1423318855, now seen corresponding path program 18 times [2020-11-09 13:02:28,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:28,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008244448] [2020-11-09 13:02:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-11-09 13:02:29,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008244448] [2020-11-09 13:02:29,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525761120] [2020-11-09 13:02:29,263 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 [2020-11-09 13:02:29,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-09 13:02:29,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 13:02:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 18 proven. 55 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-11-09 13:02:29,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:29,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2020-11-09 13:02:29,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833186533] [2020-11-09 13:02:29,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 13:02:29,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:29,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 13:02:29,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2020-11-09 13:02:29,711 INFO L87 Difference]: Start difference. First operand 511 states and 1018 transitions. Second operand 32 states. [2020-11-09 13:02:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:45,386 INFO L93 Difference]: Finished difference Result 592 states and 1180 transitions. [2020-11-09 13:02:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2020-11-09 13:02:45,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 54 [2020-11-09 13:02:45,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:45,390 INFO L225 Difference]: With dead ends: 592 [2020-11-09 13:02:45,390 INFO L226 Difference]: Without dead ends: 592 [2020-11-09 13:02:45,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21934 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=16380, Invalid=41460, Unknown=0, NotChecked=0, Total=57840 [2020-11-09 13:02:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-11-09 13:02:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 578. [2020-11-09 13:02:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-11-09 13:02:45,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1152 transitions. [2020-11-09 13:02:45,410 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1152 transitions. Word has length 54 [2020-11-09 13:02:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:45,410 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 1152 transitions. [2020-11-09 13:02:45,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 13:02:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1152 transitions. [2020-11-09 13:02:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-09 13:02:45,412 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:45,412 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:45,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 13:02:45,621 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash 433691092, now seen corresponding path program 19 times [2020-11-09 13:02:45,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:45,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025623123] [2020-11-09 13:02:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-11-09 13:02:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025623123] [2020-11-09 13:02:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625273975] [2020-11-09 13:02:46,049 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 [2020-11-09 13:02:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:46,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 13:02:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-11-09 13:02:46,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:46,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 13:02:46,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102005166] [2020-11-09 13:02:46,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 13:02:46,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:46,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 13:02:46,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:02:46,191 INFO L87 Difference]: Start difference. First operand 578 states and 1152 transitions. Second operand 23 states. [2020-11-09 13:02:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 13:02:46,321 INFO L93 Difference]: Finished difference Result 606 states and 1208 transitions. [2020-11-09 13:02:46,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-09 13:02:46,322 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-11-09 13:02:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 13:02:46,326 INFO L225 Difference]: With dead ends: 606 [2020-11-09 13:02:46,326 INFO L226 Difference]: Without dead ends: 606 [2020-11-09 13:02:46,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-11-09 13:02:46,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-11-09 13:02:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2020-11-09 13:02:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-11-09 13:02:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1208 transitions. [2020-11-09 13:02:46,350 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1208 transitions. Word has length 57 [2020-11-09 13:02:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 13:02:46,352 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 1208 transitions. [2020-11-09 13:02:46,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 13:02:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1208 transitions. [2020-11-09 13:02:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-11-09 13:02:46,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 13:02:46,354 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 13:02:46,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-09 13:02:46,568 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 13:02:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 13:02:46,569 INFO L82 PathProgramCache]: Analyzing trace with hash -364112006, now seen corresponding path program 20 times [2020-11-09 13:02:46,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 13:02:46,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966118705] [2020-11-09 13:02:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 13:02:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 13:02:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 13:02:48,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966118705] [2020-11-09 13:02:48,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757463405] [2020-11-09 13:02:48,435 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 [2020-11-09 13:02:48,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 13:02:48,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 13:02:48,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 13:02:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 13:02:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-11-09 13:02:49,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 13:02:49,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 14] total 66 [2020-11-09 13:02:49,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038144207] [2020-11-09 13:02:49,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-11-09 13:02:49,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 13:02:49,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-11-09 13:02:49,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 13:02:49,229 INFO L87 Difference]: Start difference. First operand 606 states and 1208 transitions. Second operand 66 states. Received shutdown request... [2020-11-09 13:05:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1073 states. [2020-11-09 13:05:27,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 13:05:27,318 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-09 13:05:27,322 WARN L250 ceAbstractionStarter]: Timeout [2020-11-09 13:05:27,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 01:05:27 BasicIcfg [2020-11-09 13:05:27,322 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 13:05:27,325 INFO L168 Benchmark]: Toolchain (without parser) took 246428.61 ms. Allocated memory was 164.6 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 137.1 MB in the beginning and 823.6 MB in the end (delta: -686.5 MB). Peak memory consumption was 451.6 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:27,325 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 164.6 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 13:05:27,327 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1126.17 ms. Allocated memory is still 164.6 MB. Free memory was 136.5 MB in the beginning and 85.6 MB in the end (delta: 50.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:27,327 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.11 ms. Allocated memory is still 164.6 MB. Free memory was 85.6 MB in the beginning and 83.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:27,328 INFO L168 Benchmark]: Boogie Preprocessor took 57.72 ms. Allocated memory is still 164.6 MB. Free memory was 83.1 MB in the beginning and 81.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:27,328 INFO L168 Benchmark]: RCFGBuilder took 959.45 ms. Allocated memory is still 164.6 MB. Free memory was 81.5 MB in the beginning and 54.2 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:27,330 INFO L168 Benchmark]: TraceAbstraction took 244204.80 ms. Allocated memory was 164.6 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 53.7 MB in the beginning and 823.6 MB in the end (delta: -769.9 MB). Peak memory consumption was 367.2 MB. Max. memory is 8.0 GB. [2020-11-09 13:05:27,333 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 164.6 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 1126.17 ms. Allocated memory is still 164.6 MB. Free memory was 136.5 MB in the beginning and 85.6 MB in the end (delta: 50.9 MB). Peak memory consumption was 51.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 63.11 ms. Allocated memory is still 164.6 MB. Free memory was 85.6 MB in the beginning and 83.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.72 ms. Allocated memory is still 164.6 MB. Free memory was 83.1 MB in the beginning and 81.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 959.45 ms. Allocated memory is still 164.6 MB. Free memory was 81.5 MB in the beginning and 54.2 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 244204.80 ms. Allocated memory was 164.6 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 53.7 MB in the beginning and 823.6 MB in the end (delta: -769.9 MB). Peak memory consumption was 367.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 425 VarBasedMoverChecksPositive, 4 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 4 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 12 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 19.7s, 90 PlacesBefore, 15 PlacesAfterwards, 94 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 7 FixpointIterations, 50 TrivialSequentialCompositions, 24 ConcurrentSequentialCompositions, 12 TrivialYvCompositions, 5 ConcurrentYvCompositions, 6 ChoiceCompositions, 97 TotalNumberOfCompositions, 527 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was constructing difference of abstraction (606states) and FLOYD_HOARE automaton (currently 1073 states, 66 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 1125 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 87 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 244.0s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 208.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 19.7s, HoareTripleCheckerStatistics: 273 SDtfs, 2804 SDslu, 2048 SDs, 0 SdLazy, 2944 SolverSat, 4450 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3812 GetRequests, 1545 SyntacticMatches, 0 SemanticMatches, 2266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803409 ImplicationChecksByTransitivity, 188.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=606occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 169 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 8.1s InterpolantComputationTime, 1432 NumberOfCodeBlocks, 1366 NumberOfCodeBlocksAsserted, 119 NumberOfCheckSat, 1389 ConstructedInterpolants, 0 QuantifiedInterpolants, 133341 SizeOfPredicates, 21 NumberOfNonLiveVariables, 4463 ConjunctsInSsa, 201 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 2362/6800 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