/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b09bf87 [2020-10-16 11:28:00,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:28:00,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:28:00,214 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:28:00,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:28:00,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:28:00,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:28:00,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:28:00,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:28:00,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:28:00,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:28:00,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:28:00,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:28:00,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:28:00,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:28:00,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:28:00,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:28:00,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:28:00,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:28:00,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:28:00,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:28:00,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:28:00,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:28:00,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:28:00,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 11:28:00,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 11:28:00,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 11:28:00,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 11:28:00,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 11:28:00,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 11:28:00,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:28:00,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:28:00,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:28:00,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:28:00,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:28:00,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:28:00,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:28:00,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:28:00,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:28:00,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:28:00,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:28:00,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 11:28:00,278 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:28:00,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:28:00,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:28:00,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:28:00,280 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:28:00,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:28:00,280 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:28:00,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:28:00,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:28:00,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:28:00,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:28:00,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:28:00,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:28:00,281 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:28:00,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:28:00,282 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:28:00,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:28:00,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:28:00,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:28:00,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:28:00,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:28:00,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:28:00,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:28:00,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 11:28:00,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:28:00,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:28:00,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:28:00,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:28:00,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 11:28:00,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 11:28:00,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:28:00,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:28:00,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:28:00,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:28:00,656 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:28:00,657 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-16 11:28:00,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c0b0800/29733ea393c444d38bfb0e585acf35a6/FLAGc746389e0 [2020-10-16 11:28:01,275 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:28:01,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-10-16 11:28:01,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c0b0800/29733ea393c444d38bfb0e585acf35a6/FLAGc746389e0 [2020-10-16 11:28:01,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6c0b0800/29733ea393c444d38bfb0e585acf35a6 [2020-10-16 11:28:01,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:28:01,496 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:28:01,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:28:01,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:28:01,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:28:01,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:28:01" (1/1) ... [2020-10-16 11:28:01,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fc84367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:01, skipping insertion in model container [2020-10-16 11:28:01,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:28:01" (1/1) ... [2020-10-16 11:28:01,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:28:01,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:28:02,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:28:02,297 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:28:02,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:28:02,567 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:28:02,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02 WrapperNode [2020-10-16 11:28:02,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:28:02,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:28:02,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:28:02,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:28:02,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:28:02,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:28:02,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:28:02,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:28:02,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... [2020-10-16 11:28:02,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:28:02,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:28:02,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:28:02,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:28:02,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:28:02,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:28:02,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:28:02,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 11:28:02,731 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-10-16 11:28:02,731 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-10-16 11:28:02,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:28:02,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:28:02,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:28:02,733 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:28:03,172 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:28:03,172 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 11:28:03,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:28:03 BoogieIcfgContainer [2020-10-16 11:28:03,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:28:03,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:28:03,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:28:03,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:28:03,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:28:01" (1/3) ... [2020-10-16 11:28:03,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ac3233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:28:03, skipping insertion in model container [2020-10-16 11:28:03,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:28:02" (2/3) ... [2020-10-16 11:28:03,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ac3233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:28:03, skipping insertion in model container [2020-10-16 11:28:03,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:28:03" (3/3) ... [2020-10-16 11:28:03,183 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-10-16 11:28:03,195 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:28:03,195 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:28:03,202 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:28:03,203 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:28:03,231 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,231 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,236 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,236 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,237 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,237 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,237 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,238 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,238 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,238 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,238 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,239 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,239 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,239 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,239 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,240 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,240 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,240 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,240 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,240 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,241 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,245 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,245 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,246 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,246 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,246 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,246 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,247 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,247 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:28:03,256 INFO L149 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2020-10-16 11:28:03,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 11:28:03,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:28:03,292 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:28:03,292 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 11:28:03,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:28:03,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:28:03,293 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:28:03,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:28:03,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:28:03,307 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 11:28:03,309 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-10-16 11:28:03,311 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 85 transitions, 178 flow [2020-10-16 11:28:03,313 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-10-16 11:28:03,388 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-10-16 11:28:03,389 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 11:28:03,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 84 events. 7/84 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2020-10-16 11:28:03,397 INFO L117 LiptonReduction]: Number of co-enabled transitions 640 [2020-10-16 11:28:04,745 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-16 11:28:04,944 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-10-16 11:28:05,562 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-10-16 11:28:05,884 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-16 11:28:06,388 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-16 11:28:06,783 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-16 11:28:08,168 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-10-16 11:28:08,817 WARN L193 SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-16 11:28:08,820 INFO L132 LiptonReduction]: Checked pairs total: 580 [2020-10-16 11:28:08,821 INFO L134 LiptonReduction]: Total number of compositions: 83 [2020-10-16 11:28:08,828 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-10-16 11:28:08,837 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-10-16 11:28:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-16 11:28:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-16 11:28:08,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:08,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:08,847 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-10-16 11:28:08,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:08,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504128816] [2020-10-16 11:28:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:28:09,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504128816] [2020-10-16 11:28:09,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:28:09,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:28:09,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100024637] [2020-10-16 11:28:09,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:28:09,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:09,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:28:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:28:09,103 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-16 11:28:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:09,144 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-10-16 11:28:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:28:09,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-10-16 11:28:09,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:09,158 INFO L225 Difference]: With dead ends: 20 [2020-10-16 11:28:09,158 INFO L226 Difference]: Without dead ends: 20 [2020-10-16 11:28:09,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:28:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-16 11:28:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-16 11:28:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 11:28:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-10-16 11:28:09,198 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-10-16 11:28:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:09,199 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-10-16 11:28:09,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:28:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-10-16 11:28:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-16 11:28:09,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:09,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:09,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:28:09,201 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:09,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-10-16 11:28:09,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:09,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137345092] [2020-10-16 11:28:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:28:09,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137345092] [2020-10-16 11:28:09,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255576818] [2020-10-16 11:28:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:09,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-16 11:28:09,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:28:09,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 11:28:09,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-16 11:28:09,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529076497] [2020-10-16 11:28:09,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:28:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:28:09,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:28:09,425 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-10-16 11:28:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:09,452 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-10-16 11:28:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:28:09,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-16 11:28:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:09,454 INFO L225 Difference]: With dead ends: 28 [2020-10-16 11:28:09,454 INFO L226 Difference]: Without dead ends: 28 [2020-10-16 11:28:09,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:28:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-16 11:28:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-16 11:28:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 11:28:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-10-16 11:28:09,460 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-10-16 11:28:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:09,461 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-10-16 11:28:09,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:28:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-10-16 11:28:09,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-16 11:28:09,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:09,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:09,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-16 11:28:09,663 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:09,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:09,664 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-10-16 11:28:09,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:09,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431022506] [2020-10-16 11:28:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:28:09,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431022506] [2020-10-16 11:28:09,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898243512] [2020-10-16 11:28:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 11:28:09,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:28:09,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:09,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 11:28:09,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782294229] [2020-10-16 11:28:09,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:28:09,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:09,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:28:09,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:28:09,889 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-10-16 11:28:10,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:10,002 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-10-16 11:28:10,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:28:10,006 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-16 11:28:10,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:10,007 INFO L225 Difference]: With dead ends: 44 [2020-10-16 11:28:10,007 INFO L226 Difference]: Without dead ends: 44 [2020-10-16 11:28:10,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-16 11:28:10,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-16 11:28:10,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-10-16 11:28:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-16 11:28:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-10-16 11:28:10,022 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-10-16 11:28:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:10,023 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-10-16 11:28:10,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:28:10,023 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-10-16 11:28:10,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-16 11:28:10,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:10,024 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:10,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:10,239 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:10,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-10-16 11:28:10,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:10,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500309904] [2020-10-16 11:28:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:28:10,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500309904] [2020-10-16 11:28:10,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008935052] [2020-10-16 11:28:10,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:10,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:28:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:10,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:28:10,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:28:10,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:10,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:28:10,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986827529] [2020-10-16 11:28:10,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:28:10,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:10,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:28:10,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:28:10,428 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-10-16 11:28:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:10,454 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-10-16 11:28:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:28:10,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-16 11:28:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:10,457 INFO L225 Difference]: With dead ends: 54 [2020-10-16 11:28:10,457 INFO L226 Difference]: Without dead ends: 54 [2020-10-16 11:28:10,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:28:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-16 11:28:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-10-16 11:28:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-16 11:28:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-10-16 11:28:10,465 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-10-16 11:28:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:10,466 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-10-16 11:28:10,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:28:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-10-16 11:28:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-16 11:28:10,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:10,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:10,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:10,681 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:10,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-10-16 11:28:10,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:10,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834343501] [2020-10-16 11:28:10,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 11:28:10,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834343501] [2020-10-16 11:28:10,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928856463] [2020-10-16 11:28:10,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:10,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 11:28:10,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:10,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:28:10,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 11:28:10,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:10,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-10-16 11:28:10,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11091419] [2020-10-16 11:28:10,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 11:28:10,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:10,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 11:28:10,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-16 11:28:10,945 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-10-16 11:28:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:11,228 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-10-16 11:28:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 11:28:11,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-16 11:28:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:11,234 INFO L225 Difference]: With dead ends: 76 [2020-10-16 11:28:11,234 INFO L226 Difference]: Without dead ends: 76 [2020-10-16 11:28:11,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:28:11,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-16 11:28:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-10-16 11:28:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-16 11:28:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-10-16 11:28:11,246 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-10-16 11:28:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:11,246 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-10-16 11:28:11,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 11:28:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-10-16 11:28:11,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:28:11,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:11,247 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:11,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:11,450 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:11,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:11,451 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-10-16 11:28:11,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:11,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254855089] [2020-10-16 11:28:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 11:28:11,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254855089] [2020-10-16 11:28:11,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389164443] [2020-10-16 11:28:11,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:11,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:28:11,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:11,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:28:11,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 11:28:11,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:11,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:28:11,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005781085] [2020-10-16 11:28:11,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:28:11,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:11,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:28:11,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:28:11,698 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 8 states. [2020-10-16 11:28:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:11,729 INFO L93 Difference]: Finished difference Result 88 states and 172 transitions. [2020-10-16 11:28:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:28:11,730 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-16 11:28:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:11,731 INFO L225 Difference]: With dead ends: 88 [2020-10-16 11:28:11,731 INFO L226 Difference]: Without dead ends: 88 [2020-10-16 11:28:11,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:28:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-16 11:28:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-10-16 11:28:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:28:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 160 transitions. [2020-10-16 11:28:11,740 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 160 transitions. Word has length 19 [2020-10-16 11:28:11,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:11,741 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 160 transitions. [2020-10-16 11:28:11,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:28:11,741 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 160 transitions. [2020-10-16 11:28:11,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-16 11:28:11,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:11,742 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:11,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:28:11,956 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:11,956 INFO L82 PathProgramCache]: Analyzing trace with hash -882362510, now seen corresponding path program 5 times [2020-10-16 11:28:11,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:11,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550218917] [2020-10-16 11:28:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 11:28:12,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550218917] [2020-10-16 11:28:12,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217172115] [2020-10-16 11:28:12,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:12,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 11:28:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:12,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:28:12,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 11:28:12,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:12,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-10-16 11:28:12,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190728433] [2020-10-16 11:28:12,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:28:12,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:28:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:28:12,140 INFO L87 Difference]: Start difference. First operand 82 states and 160 transitions. Second operand 12 states. [2020-10-16 11:28:12,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:12,688 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2020-10-16 11:28:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 11:28:12,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2020-10-16 11:28:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:12,692 INFO L225 Difference]: With dead ends: 116 [2020-10-16 11:28:12,692 INFO L226 Difference]: Without dead ends: 116 [2020-10-16 11:28:12,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2020-10-16 11:28:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-16 11:28:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-16 11:28:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-16 11:28:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 214 transitions. [2020-10-16 11:28:12,703 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 214 transitions. Word has length 21 [2020-10-16 11:28:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:12,703 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 214 transitions. [2020-10-16 11:28:12,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:28:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 214 transitions. [2020-10-16 11:28:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-16 11:28:12,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:12,705 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:12,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:12,919 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:12,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1928037594, now seen corresponding path program 6 times [2020-10-16 11:28:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:12,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637319142] [2020-10-16 11:28:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-16 11:28:13,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637319142] [2020-10-16 11:28:13,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664087760] [2020-10-16 11:28:13,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:13,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:28:13,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:13,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:28:13,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-16 11:28:13,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:13,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-10-16 11:28:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191460231] [2020-10-16 11:28:13,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:28:13,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:28:13,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:28:13,189 INFO L87 Difference]: Start difference. First operand 109 states and 214 transitions. Second operand 14 states. [2020-10-16 11:28:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:14,017 INFO L93 Difference]: Finished difference Result 148 states and 292 transitions. [2020-10-16 11:28:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-16 11:28:14,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-16 11:28:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:14,019 INFO L225 Difference]: With dead ends: 148 [2020-10-16 11:28:14,019 INFO L226 Difference]: Without dead ends: 148 [2020-10-16 11:28:14,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:28:14,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-16 11:28:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2020-10-16 11:28:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-16 11:28:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 276 transitions. [2020-10-16 11:28:14,032 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 276 transitions. Word has length 24 [2020-10-16 11:28:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:14,032 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 276 transitions. [2020-10-16 11:28:14,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:28:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 276 transitions. [2020-10-16 11:28:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:28:14,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:14,035 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:14,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:14,250 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:14,251 INFO L82 PathProgramCache]: Analyzing trace with hash 867592876, now seen corresponding path program 7 times [2020-10-16 11:28:14,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:14,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991125313] [2020-10-16 11:28:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 11:28:14,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991125313] [2020-10-16 11:28:14,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207722492] [2020-10-16 11:28:14,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:14,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:28:14,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 11:28:14,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:14,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 11:28:14,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187720263] [2020-10-16 11:28:14,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 11:28:14,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:14,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 11:28:14,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:28:14,468 INFO L87 Difference]: Start difference. First operand 140 states and 276 transitions. Second operand 11 states. [2020-10-16 11:28:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:14,517 INFO L93 Difference]: Finished difference Result 164 states and 324 transitions. [2020-10-16 11:28:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:28:14,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-16 11:28:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:14,519 INFO L225 Difference]: With dead ends: 164 [2020-10-16 11:28:14,519 INFO L226 Difference]: Without dead ends: 164 [2020-10-16 11:28:14,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-16 11:28:14,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-16 11:28:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2020-10-16 11:28:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-16 11:28:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 308 transitions. [2020-10-16 11:28:14,530 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 308 transitions. Word has length 27 [2020-10-16 11:28:14,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:14,531 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 308 transitions. [2020-10-16 11:28:14,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 11:28:14,531 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 308 transitions. [2020-10-16 11:28:14,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:28:14,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:14,533 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:14,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-16 11:28:14,747 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash -441398951, now seen corresponding path program 8 times [2020-10-16 11:28:14,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:14,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99427683] [2020-10-16 11:28:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 11:28:14,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99427683] [2020-10-16 11:28:14,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814909100] [2020-10-16 11:28:14,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:14,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:28:14,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:28:14,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 11:28:14,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:14,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 11:28:14,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523212642] [2020-10-16 11:28:14,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 11:28:14,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:14,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 11:28:14,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:28:14,997 INFO L87 Difference]: Start difference. First operand 156 states and 308 transitions. Second operand 12 states. [2020-10-16 11:28:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:15,056 INFO L93 Difference]: Finished difference Result 180 states and 356 transitions. [2020-10-16 11:28:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 11:28:15,057 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-10-16 11:28:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:15,058 INFO L225 Difference]: With dead ends: 180 [2020-10-16 11:28:15,058 INFO L226 Difference]: Without dead ends: 180 [2020-10-16 11:28:15,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-16 11:28:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-16 11:28:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-16 11:28:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-16 11:28:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 340 transitions. [2020-10-16 11:28:15,079 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 340 transitions. Word has length 29 [2020-10-16 11:28:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:15,079 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 340 transitions. [2020-10-16 11:28:15,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 11:28:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 340 transitions. [2020-10-16 11:28:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 11:28:15,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:15,083 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:15,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:15,284 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:15,284 INFO L82 PathProgramCache]: Analyzing trace with hash 42873030, now seen corresponding path program 9 times [2020-10-16 11:28:15,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:15,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862036968] [2020-10-16 11:28:15,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-16 11:28:15,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862036968] [2020-10-16 11:28:15,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399527446] [2020-10-16 11:28:15,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:15,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 11:28:15,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:15,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 11:28:15,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-16 11:28:15,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:15,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-10-16 11:28:15,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249111238] [2020-10-16 11:28:15,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:28:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:15,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:28:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:28:15,637 INFO L87 Difference]: Start difference. First operand 172 states and 340 transitions. Second operand 18 states. [2020-10-16 11:28:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:17,332 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2020-10-16 11:28:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-16 11:28:17,333 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-10-16 11:28:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:17,335 INFO L225 Difference]: With dead ends: 220 [2020-10-16 11:28:17,335 INFO L226 Difference]: Without dead ends: 220 [2020-10-16 11:28:17,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1848, Invalid=4158, Unknown=0, NotChecked=0, Total=6006 [2020-10-16 11:28:17,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-16 11:28:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 211. [2020-10-16 11:28:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-16 11:28:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 418 transitions. [2020-10-16 11:28:17,345 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 418 transitions. Word has length 31 [2020-10-16 11:28:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:17,346 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 418 transitions. [2020-10-16 11:28:17,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:28:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 418 transitions. [2020-10-16 11:28:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-16 11:28:17,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:17,347 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:17,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:17,562 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:17,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1510869138, now seen corresponding path program 10 times [2020-10-16 11:28:17,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:17,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001213020] [2020-10-16 11:28:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 11:28:17,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001213020] [2020-10-16 11:28:17,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145356670] [2020-10-16 11:28:17,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:17,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:28:17,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:17,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:28:17,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 11:28:17,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:17,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-16 11:28:17,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313637971] [2020-10-16 11:28:17,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 11:28:17,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:17,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 11:28:17,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:28:17,799 INFO L87 Difference]: Start difference. First operand 211 states and 418 transitions. Second operand 14 states. [2020-10-16 11:28:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:17,857 INFO L93 Difference]: Finished difference Result 238 states and 472 transitions. [2020-10-16 11:28:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 11:28:17,863 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-16 11:28:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:17,864 INFO L225 Difference]: With dead ends: 238 [2020-10-16 11:28:17,864 INFO L226 Difference]: Without dead ends: 238 [2020-10-16 11:28:17,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-16 11:28:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-16 11:28:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 229. [2020-10-16 11:28:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-16 11:28:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 454 transitions. [2020-10-16 11:28:17,871 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 454 transitions. Word has length 34 [2020-10-16 11:28:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:17,872 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 454 transitions. [2020-10-16 11:28:17,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 11:28:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 454 transitions. [2020-10-16 11:28:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-16 11:28:17,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:17,873 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:18,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 11:28:18,087 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:18,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:18,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1014578501, now seen corresponding path program 11 times [2020-10-16 11:28:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:18,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325099105] [2020-10-16 11:28:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-16 11:28:18,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325099105] [2020-10-16 11:28:18,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971812063] [2020-10-16 11:28:18,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:18,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 11:28:18,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 11:28:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-16 11:28:18,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:18,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2020-10-16 11:28:18,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543412955] [2020-10-16 11:28:18,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:28:18,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:18,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:28:18,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:28:18,445 INFO L87 Difference]: Start difference. First operand 229 states and 454 transitions. Second operand 21 states. [2020-10-16 11:28:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:21,330 INFO L93 Difference]: Finished difference Result 284 states and 564 transitions. [2020-10-16 11:28:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-16 11:28:21,331 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-16 11:28:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:21,334 INFO L225 Difference]: With dead ends: 284 [2020-10-16 11:28:21,334 INFO L226 Difference]: Without dead ends: 284 [2020-10-16 11:28:21,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3276, Invalid=7644, Unknown=0, NotChecked=0, Total=10920 [2020-10-16 11:28:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-16 11:28:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 274. [2020-10-16 11:28:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-16 11:28:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 544 transitions. [2020-10-16 11:28:21,352 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 544 transitions. Word has length 36 [2020-10-16 11:28:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:21,353 INFO L481 AbstractCegarLoop]: Abstraction has 274 states and 544 transitions. [2020-10-16 11:28:21,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:28:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 544 transitions. [2020-10-16 11:28:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-16 11:28:21,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:21,355 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:21,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:28:21,570 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:21,571 INFO L82 PathProgramCache]: Analyzing trace with hash -299405075, now seen corresponding path program 12 times [2020-10-16 11:28:21,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:21,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252535070] [2020-10-16 11:28:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-16 11:28:21,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252535070] [2020-10-16 11:28:21,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108192070] [2020-10-16 11:28:21,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:21,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-16 11:28:21,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:21,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 11:28:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-16 11:28:21,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:21,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2020-10-16 11:28:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699716835] [2020-10-16 11:28:21,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:28:21,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:21,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:28:21,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:28:21,998 INFO L87 Difference]: Start difference. First operand 274 states and 544 transitions. Second operand 23 states. [2020-10-16 11:28:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:25,747 INFO L93 Difference]: Finished difference Result 334 states and 664 transitions. [2020-10-16 11:28:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-16 11:28:25,752 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 39 [2020-10-16 11:28:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:25,754 INFO L225 Difference]: With dead ends: 334 [2020-10-16 11:28:25,754 INFO L226 Difference]: Without dead ends: 334 [2020-10-16 11:28:25,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4725, Invalid=11277, Unknown=0, NotChecked=0, Total=16002 [2020-10-16 11:28:25,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-16 11:28:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 323. [2020-10-16 11:28:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-16 11:28:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 642 transitions. [2020-10-16 11:28:25,767 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 642 transitions. Word has length 39 [2020-10-16 11:28:25,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:25,767 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 642 transitions. [2020-10-16 11:28:25,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:28:25,767 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 642 transitions. [2020-10-16 11:28:25,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-16 11:28:25,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:25,769 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:25,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 11:28:25,983 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:25,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1077564853, now seen corresponding path program 13 times [2020-10-16 11:28:25,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:25,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326412871] [2020-10-16 11:28:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 11:28:26,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326412871] [2020-10-16 11:28:26,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695642668] [2020-10-16 11:28:26,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:26,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-16 11:28:26,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 11:28:26,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:26,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-16 11:28:26,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114522197] [2020-10-16 11:28:26,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:28:26,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:28:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:28:26,270 INFO L87 Difference]: Start difference. First operand 323 states and 642 transitions. Second operand 17 states. [2020-10-16 11:28:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:26,336 INFO L93 Difference]: Finished difference Result 356 states and 708 transitions. [2020-10-16 11:28:26,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 11:28:26,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-16 11:28:26,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:26,342 INFO L225 Difference]: With dead ends: 356 [2020-10-16 11:28:26,342 INFO L226 Difference]: Without dead ends: 356 [2020-10-16 11:28:26,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:28:26,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-16 11:28:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 345. [2020-10-16 11:28:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-16 11:28:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 686 transitions. [2020-10-16 11:28:26,351 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 686 transitions. Word has length 42 [2020-10-16 11:28:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:26,351 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 686 transitions. [2020-10-16 11:28:26,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:28:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 686 transitions. [2020-10-16 11:28:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-16 11:28:26,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:26,353 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:26,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:26,567 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:26,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:26,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1718191106, now seen corresponding path program 14 times [2020-10-16 11:28:26,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:26,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092662176] [2020-10-16 11:28:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 11:28:26,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092662176] [2020-10-16 11:28:26,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744477475] [2020-10-16 11:28:26,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:26,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:28:26,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:26,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:28:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 11:28:26,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:26,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-16 11:28:26,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687925344] [2020-10-16 11:28:26,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 11:28:26,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:26,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 11:28:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:28:26,942 INFO L87 Difference]: Start difference. First operand 345 states and 686 transitions. Second operand 18 states. [2020-10-16 11:28:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:27,006 INFO L93 Difference]: Finished difference Result 378 states and 752 transitions. [2020-10-16 11:28:27,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 11:28:27,007 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-16 11:28:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:27,009 INFO L225 Difference]: With dead ends: 378 [2020-10-16 11:28:27,009 INFO L226 Difference]: Without dead ends: 378 [2020-10-16 11:28:27,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-16 11:28:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-16 11:28:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 367. [2020-10-16 11:28:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-16 11:28:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 730 transitions. [2020-10-16 11:28:27,020 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 730 transitions. Word has length 44 [2020-10-16 11:28:27,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:27,021 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 730 transitions. [2020-10-16 11:28:27,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 11:28:27,021 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 730 transitions. [2020-10-16 11:28:27,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-16 11:28:27,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:27,022 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:27,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:28:27,237 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1115270385, now seen corresponding path program 15 times [2020-10-16 11:28:27,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:27,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909672081] [2020-10-16 11:28:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-16 11:28:27,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909672081] [2020-10-16 11:28:27,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241106341] [2020-10-16 11:28:27,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:27,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:28:27,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:27,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 11:28:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-16 11:28:27,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:27,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2020-10-16 11:28:27,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776132229] [2020-10-16 11:28:27,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-16 11:28:27,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-16 11:28:27,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-16 11:28:27,686 INFO L87 Difference]: Start difference. First operand 367 states and 730 transitions. Second operand 27 states. [2020-10-16 11:28:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:33,950 INFO L93 Difference]: Finished difference Result 436 states and 868 transitions. [2020-10-16 11:28:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2020-10-16 11:28:33,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2020-10-16 11:28:33,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:33,953 INFO L225 Difference]: With dead ends: 436 [2020-10-16 11:28:33,953 INFO L226 Difference]: Without dead ends: 436 [2020-10-16 11:28:33,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10431 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8415, Invalid=20655, Unknown=0, NotChecked=0, Total=29070 [2020-10-16 11:28:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-16 11:28:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 424. [2020-10-16 11:28:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-10-16 11:28:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 844 transitions. [2020-10-16 11:28:33,968 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 844 transitions. Word has length 46 [2020-10-16 11:28:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:33,969 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 844 transitions. [2020-10-16 11:28:33,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-16 11:28:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 844 transitions. [2020-10-16 11:28:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-16 11:28:33,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:33,970 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:34,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:28:34,185 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:34,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1391947135, now seen corresponding path program 16 times [2020-10-16 11:28:34,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:34,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85055172] [2020-10-16 11:28:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 11:28:34,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85055172] [2020-10-16 11:28:34,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44644905] [2020-10-16 11:28:34,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:34,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:28:34,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:34,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:28:34,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 11:28:34,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:34,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-16 11:28:34,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287550012] [2020-10-16 11:28:34,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-16 11:28:34,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:34,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-16 11:28:34,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:28:34,539 INFO L87 Difference]: Start difference. First operand 424 states and 844 transitions. Second operand 20 states. [2020-10-16 11:28:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:34,617 INFO L93 Difference]: Finished difference Result 460 states and 916 transitions. [2020-10-16 11:28:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 11:28:34,617 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-16 11:28:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:34,620 INFO L225 Difference]: With dead ends: 460 [2020-10-16 11:28:34,620 INFO L226 Difference]: Without dead ends: 460 [2020-10-16 11:28:34,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-16 11:28:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-16 11:28:34,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 448. [2020-10-16 11:28:34,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-10-16 11:28:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 892 transitions. [2020-10-16 11:28:34,630 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 892 transitions. Word has length 49 [2020-10-16 11:28:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:34,630 INFO L481 AbstractCegarLoop]: Abstraction has 448 states and 892 transitions. [2020-10-16 11:28:34,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-16 11:28:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 892 transitions. [2020-10-16 11:28:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-16 11:28:34,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:34,632 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:34,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:28:34,846 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:34,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1588788882, now seen corresponding path program 17 times [2020-10-16 11:28:34,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:34,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64094419] [2020-10-16 11:28:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 11:28:35,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64094419] [2020-10-16 11:28:35,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376032207] [2020-10-16 11:28:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:35,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-10-16 11:28:35,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 11:28:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-16 11:28:35,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:35,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12] total 30 [2020-10-16 11:28:35,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415367406] [2020-10-16 11:28:35,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-16 11:28:35,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:35,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-16 11:28:35,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=615, Unknown=0, NotChecked=0, Total=870 [2020-10-16 11:28:35,362 INFO L87 Difference]: Start difference. First operand 448 states and 892 transitions. Second operand 30 states. [2020-10-16 11:28:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:44,640 INFO L93 Difference]: Finished difference Result 524 states and 1044 transitions. [2020-10-16 11:28:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2020-10-16 11:28:44,641 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 51 [2020-10-16 11:28:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:44,647 INFO L225 Difference]: With dead ends: 524 [2020-10-16 11:28:44,647 INFO L226 Difference]: Without dead ends: 524 [2020-10-16 11:28:44,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16280 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=12540, Invalid=31350, Unknown=0, NotChecked=0, Total=43890 [2020-10-16 11:28:44,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-10-16 11:28:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 511. [2020-10-16 11:28:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-16 11:28:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1018 transitions. [2020-10-16 11:28:44,661 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1018 transitions. Word has length 51 [2020-10-16 11:28:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:44,661 INFO L481 AbstractCegarLoop]: Abstraction has 511 states and 1018 transitions. [2020-10-16 11:28:44,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-16 11:28:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1018 transitions. [2020-10-16 11:28:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-16 11:28:44,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:44,663 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:44,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:44,879 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:44,879 INFO L82 PathProgramCache]: Analyzing trace with hash 835392874, now seen corresponding path program 18 times [2020-10-16 11:28:44,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:44,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407967753] [2020-10-16 11:28:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 11:28:45,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407967753] [2020-10-16 11:28:45,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369674176] [2020-10-16 11:28:45,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:45,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-16 11:28:45,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:45,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:28:45,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 18 proven. 55 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-16 11:28:45,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:45,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2020-10-16 11:28:45,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950063756] [2020-10-16 11:28:45,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-16 11:28:45,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:45,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-16 11:28:45,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=705, Unknown=0, NotChecked=0, Total=992 [2020-10-16 11:28:45,508 INFO L87 Difference]: Start difference. First operand 511 states and 1018 transitions. Second operand 32 states. [2020-10-16 11:28:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:57,700 INFO L93 Difference]: Finished difference Result 592 states and 1180 transitions. [2020-10-16 11:28:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 241 states. [2020-10-16 11:28:57,701 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 54 [2020-10-16 11:28:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:57,703 INFO L225 Difference]: With dead ends: 592 [2020-10-16 11:28:57,703 INFO L226 Difference]: Without dead ends: 592 [2020-10-16 11:28:57,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21934 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=16380, Invalid=41460, Unknown=0, NotChecked=0, Total=57840 [2020-10-16 11:28:57,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2020-10-16 11:28:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 578. [2020-10-16 11:28:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2020-10-16 11:28:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1152 transitions. [2020-10-16 11:28:57,718 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1152 transitions. Word has length 54 [2020-10-16 11:28:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:57,718 INFO L481 AbstractCegarLoop]: Abstraction has 578 states and 1152 transitions. [2020-10-16 11:28:57,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-16 11:28:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1152 transitions. [2020-10-16 11:28:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-16 11:28:57,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:57,720 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:57,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:57,934 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1589265368, now seen corresponding path program 19 times [2020-10-16 11:28:57,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:57,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735628032] [2020-10-16 11:28:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-16 11:28:58,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735628032] [2020-10-16 11:28:58,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399462730] [2020-10-16 11:28:58,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-16 11:28:58,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:28:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-16 11:28:58,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:28:58,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-16 11:28:58,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123767978] [2020-10-16 11:28:58,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:28:58,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:28:58,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:28:58,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:28:58,382 INFO L87 Difference]: Start difference. First operand 578 states and 1152 transitions. Second operand 23 states. [2020-10-16 11:28:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:28:58,470 INFO L93 Difference]: Finished difference Result 606 states and 1208 transitions. [2020-10-16 11:28:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:28:58,471 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2020-10-16 11:28:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:28:58,475 INFO L225 Difference]: With dead ends: 606 [2020-10-16 11:28:58,475 INFO L226 Difference]: Without dead ends: 606 [2020-10-16 11:28:58,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:28:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-16 11:28:58,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2020-10-16 11:28:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-10-16 11:28:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1208 transitions. [2020-10-16 11:28:58,486 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1208 transitions. Word has length 57 [2020-10-16 11:28:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:28:58,487 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 1208 transitions. [2020-10-16 11:28:58,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:28:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1208 transitions. [2020-10-16 11:28:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-16 11:28:58,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:28:58,489 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:28:58,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 11:28:58,704 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 11:28:58,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:28:58,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1130959339, now seen corresponding path program 20 times [2020-10-16 11:28:58,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:28:58,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351055352] [2020-10-16 11:28:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:28:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:28:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-16 11:28:58,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351055352] [2020-10-16 11:28:58,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166288260] [2020-10-16 11:28:58,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:28:58,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:28:58,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:28:58,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 53 conjunts are in the unsatisfiable core [2020-10-16 11:28:58,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:29:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:29:00,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:29:00,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 52] total 66 [2020-10-16 11:29:00,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336222047] [2020-10-16 11:29:00,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-16 11:29:00,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:29:00,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-16 11:29:00,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=881, Invalid=3409, Unknown=0, NotChecked=0, Total=4290 [2020-10-16 11:29:00,748 INFO L87 Difference]: Start difference. First operand 606 states and 1208 transitions. Second operand 66 states. Received shutdown request... [2020-10-16 11:32:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1897 states. [2020-10-16 11:32:12,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:32:12,232 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 11:32:12,238 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 11:32:12,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:32:12 BasicIcfg [2020-10-16 11:32:12,239 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:32:12,240 INFO L168 Benchmark]: Toolchain (without parser) took 250744.89 ms. Allocated memory was 141.6 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 102.0 MB in the beginning and 917.3 MB in the end (delta: -815.4 MB). Peak memory consumption was 551.5 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:12,241 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-10-16 11:32:12,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1070.88 ms. Allocated memory was 141.6 MB in the beginning and 201.3 MB in the end (delta: 59.8 MB). Free memory was 101.5 MB in the beginning and 105.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:12,242 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.95 ms. Allocated memory is still 201.3 MB. Free memory was 105.2 MB in the beginning and 102.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:12,242 INFO L168 Benchmark]: Boogie Preprocessor took 43.05 ms. Allocated memory is still 201.3 MB. Free memory was 102.3 MB in the beginning and 100.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:12,244 INFO L168 Benchmark]: RCFGBuilder took 508.29 ms. Allocated memory was 201.3 MB in the beginning and 236.5 MB in the end (delta: 35.1 MB). Free memory was 100.4 MB in the beginning and 189.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:12,245 INFO L168 Benchmark]: TraceAbstraction took 249063.56 ms. Allocated memory was 236.5 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 189.6 MB in the beginning and 917.3 MB in the end (delta: -727.8 MB). Peak memory consumption was 544.2 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:12,247 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.7 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1070.88 ms. Allocated memory was 141.6 MB in the beginning and 201.3 MB in the end (delta: 59.8 MB). Free memory was 101.5 MB in the beginning and 105.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 61.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 53.95 ms. Allocated memory is still 201.3 MB. Free memory was 105.2 MB in the beginning and 102.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.05 ms. Allocated memory is still 201.3 MB. Free memory was 102.3 MB in the beginning and 100.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 508.29 ms. Allocated memory was 201.3 MB in the beginning and 236.5 MB in the end (delta: 35.1 MB). Free memory was 100.4 MB in the beginning and 189.6 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249063.56 ms. Allocated memory was 236.5 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 189.6 MB in the beginning and 917.3 MB in the end (delta: -727.8 MB). Peak memory consumption was 544.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 432 VarBasedMoverChecksPositive, 9 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 12 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 5.5s, 82 PlacesBefore, 15 PlacesAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 6 FixpointIterations, 44 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 83 TotalNumberOfCompositions, 580 MoverChecksTotal - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (606states) and FLOYD_HOARE automaton (currently 1897 states, 66 states before enhancement),while ReachableStatesComputation was computing reachable states (17093 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 248.9s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 229.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 273 SDtfs, 3009 SDslu, 2353 SDs, 0 SdLazy, 3562 SolverSat, 3930 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4817 GetRequests, 1737 SyntacticMatches, 0 SemanticMatches, 3080 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531686 ImplicationChecksByTransitivity, 203.2s 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: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1432 NumberOfCodeBlocks, 1366 NumberOfCodeBlocksAsserted, 119 NumberOfCheckSat, 1389 ConstructedInterpolants, 0 QuantifiedInterpolants, 133341 SizeOfPredicates, 60 NumberOfNonLiveVariables, 3839 ConjunctsInSsa, 241 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