/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/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 14:23:12,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 14:23:12,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 14:23:12,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 14:23:12,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 14:23:12,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 14:23:12,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 14:23:12,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 14:23:12,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 14:23:12,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 14:23:12,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 14:23:12,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 14:23:12,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 14:23:12,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 14:23:12,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 14:23:12,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 14:23:12,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 14:23:12,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 14:23:12,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 14:23:12,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 14:23:12,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 14:23:12,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 14:23:12,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 14:23:12,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 14:23:12,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-17 14:23:12,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-17 14:23:12,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-17 14:23:12,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-17 14:23:12,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-17 14:23:12,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-17 14:23:12,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-17 14:23:12,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-17 14:23:12,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-17 14:23:12,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-17 14:23:12,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-17 14:23:12,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-17 14:23:12,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-17 14:23:12,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-17 14:23:12,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 14:23:12,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 14:23:12,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 14:23:12,442 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-17 14:23:12,502 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 14:23:12,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 14:23:12,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 14:23:12,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 14:23:12,505 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 14:23:12,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 14:23:12,506 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 14:23:12,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 14:23:12,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 14:23:12,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 14:23:12,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 14:23:12,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 14:23:12,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 14:23:12,508 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 14:23:12,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 14:23:12,511 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 14:23:12,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 14:23:12,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 14:23:12,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 14:23:12,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 14:23:12,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 14:23:12,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:23:12,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 14:23:12,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 14:23:12,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 14:23:12,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 14:23:12,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 14:23:12,514 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 14:23:12,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 14:23:13,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 14:23:13,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 14:23:13,053 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 14:23:13,055 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 14:23:13,055 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 14:23:13,057 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-17 14:23:13,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5591abfb/8c3d1de7966f45eebcd6cecf2398f115/FLAG13dc57c9f [2020-09-17 14:23:13,904 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 14:23:13,905 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-17 14:23:13,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5591abfb/8c3d1de7966f45eebcd6cecf2398f115/FLAG13dc57c9f [2020-09-17 14:23:14,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5591abfb/8c3d1de7966f45eebcd6cecf2398f115 [2020-09-17 14:23:14,111 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 14:23:14,117 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 14:23:14,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 14:23:14,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 14:23:14,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 14:23:14,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:23:14" (1/1) ... [2020-09-17 14:23:14,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@409b5e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:14, skipping insertion in model container [2020-09-17 14:23:14,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:23:14" (1/1) ... [2020-09-17 14:23:14,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 14:23:14,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 14:23:15,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:23:15,175 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 14:23:15,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 14:23:15,538 INFO L208 MainTranslator]: Completed translation [2020-09-17 14:23:15,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15 WrapperNode [2020-09-17 14:23:15,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 14:23:15,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 14:23:15,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 14:23:15,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 14:23:15,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,616 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 14:23:15,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 14:23:15,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 14:23:15,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 14:23:15,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... [2020-09-17 14:23:15,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 14:23:15,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 14:23:15,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 14:23:15,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 14:23:15,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 14:23:15,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 14:23:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 14:23:15,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-17 14:23:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-09-17 14:23:15,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-09-17 14:23:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 14:23:15,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 14:23:15,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 14:23:15,841 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 14:23:16,307 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 14:23:16,307 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-17 14:23:16,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:23:16 BoogieIcfgContainer [2020-09-17 14:23:16,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 14:23:16,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 14:23:16,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 14:23:16,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 14:23:16,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:23:14" (1/3) ... [2020-09-17 14:23:16,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787b6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:23:16, skipping insertion in model container [2020-09-17 14:23:16,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:23:15" (2/3) ... [2020-09-17 14:23:16,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787b6df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:23:16, skipping insertion in model container [2020-09-17 14:23:16,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:23:16" (3/3) ... [2020-09-17 14:23:16,323 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-09-17 14:23:16,336 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 14:23:16,336 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 14:23:16,346 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 14:23:16,347 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 14:23:16,375 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,375 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,375 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,376 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,376 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,376 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,377 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,377 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,377 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,377 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,378 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,378 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,378 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,378 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,379 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,379 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,379 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,379 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,380 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,380 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,380 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,385 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,385 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,386 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,386 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,386 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,386 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,387 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,387 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 14:23:16,422 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-17 14:23:16,448 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 14:23:16,448 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 14:23:16,448 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 14:23:16,448 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 14:23:16,448 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 14:23:16,448 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 14:23:16,449 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 14:23:16,449 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 14:23:16,471 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-09-17 14:23:16,474 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-17 14:23:16,537 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-17 14:23:16,537 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-17 14:23:16,544 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. [2020-09-17 14:23:16,548 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-17 14:23:16,582 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-17 14:23:16,582 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-17 14:23:16,586 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. [2020-09-17 14:23:16,588 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2020-09-17 14:23:16,590 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 14:23:18,165 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-17 14:23:18,398 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-17 14:23:19,055 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-09-17 14:23:19,396 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-17 14:23:19,967 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-09-17 14:23:20,464 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-09-17 14:23:22,064 WARN L193 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-09-17 14:23:22,755 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-09-17 14:23:22,759 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2020-09-17 14:23:22,759 INFO L214 etLargeBlockEncoding]: Total number of compositions: 78 [2020-09-17 14:23:22,765 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-09-17 14:23:22,776 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-09-17 14:23:22,779 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-09-17 14:23:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 14:23:22,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:22,791 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:22,791 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-09-17 14:23:22,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:22,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663810402] [2020-09-17 14:23:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:23:23,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663810402] [2020-09-17 14:23:23,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 14:23:23,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 14:23:23,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174589054] [2020-09-17 14:23:23,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 14:23:23,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:23,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 14:23:23,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-17 14:23:23,133 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-09-17 14:23:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:23,184 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-09-17 14:23:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 14:23:23,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-17 14:23:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:23,205 INFO L225 Difference]: With dead ends: 20 [2020-09-17 14:23:23,205 INFO L226 Difference]: Without dead ends: 20 [2020-09-17 14:23:23,207 INFO L675 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 [2020-09-17 14:23:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-17 14:23:23,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-17 14:23:23,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-17 14:23:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-09-17 14:23:23,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-09-17 14:23:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:23,258 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-09-17 14:23:23,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 14:23:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-09-17 14:23:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-17 14:23:23,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:23,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:23,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 14:23:23,260 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-09-17 14:23:23,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:23,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143311791] [2020-09-17 14:23:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:23:23,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143311791] [2020-09-17 14:23:23,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035695893] [2020-09-17 14:23:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:23,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-17 14:23:23,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-17 14:23:23,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-17 14:23:23,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-09-17 14:23:23,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164068510] [2020-09-17 14:23:23,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-17 14:23:23,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-17 14:23:23,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-17 14:23:23,569 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-09-17 14:23:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:23,597 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-09-17 14:23:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-17 14:23:23,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-09-17 14:23:23,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:23,601 INFO L225 Difference]: With dead ends: 28 [2020-09-17 14:23:23,601 INFO L226 Difference]: Without dead ends: 28 [2020-09-17 14:23:23,603 INFO L675 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 [2020-09-17 14:23:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-17 14:23:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-09-17 14:23:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-17 14:23:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-09-17 14:23:23,616 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-09-17 14:23:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:23,618 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-09-17 14:23:23,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-17 14:23:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-09-17 14:23:23,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 14:23:23,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:23,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:23,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-17 14:23:23,836 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-09-17 14:23:23,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:23,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106491444] [2020-09-17 14:23:23,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:23:23,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106491444] [2020-09-17 14:23:23,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739114057] [2020-09-17 14:23:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-17 14:23:24,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-17 14:23:24,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:24,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-17 14:23:24,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286156002] [2020-09-17 14:23:24,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 14:23:24,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 14:23:24,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 14:23:24,111 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-09-17 14:23:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:24,261 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-09-17 14:23:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 14:23:24,262 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-17 14:23:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:24,263 INFO L225 Difference]: With dead ends: 44 [2020-09-17 14:23:24,263 INFO L226 Difference]: Without dead ends: 44 [2020-09-17 14:23:24,264 INFO L675 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 [2020-09-17 14:23:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-17 14:23:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-09-17 14:23:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-17 14:23:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-09-17 14:23:24,271 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-09-17 14:23:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:24,271 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-09-17 14:23:24,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 14:23:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-09-17 14:23:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 14:23:24,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:24,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:24,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:24,483 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:24,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:24,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-09-17 14:23:24,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:24,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631921416] [2020-09-17 14:23:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-17 14:23:24,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631921416] [2020-09-17 14:23:24,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965105920] [2020-09-17 14:23:24,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:24,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:23:24,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:24,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-17 14:23:24,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-17 14:23:24,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:24,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 14:23:24,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507363864] [2020-09-17 14:23:24,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 14:23:24,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 14:23:24,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-17 14:23:24,764 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-09-17 14:23:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:24,805 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-09-17 14:23:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 14:23:24,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-17 14:23:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:24,811 INFO L225 Difference]: With dead ends: 54 [2020-09-17 14:23:24,811 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 14:23:24,811 INFO L675 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 [2020-09-17 14:23:24,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 14:23:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-09-17 14:23:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 14:23:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-09-17 14:23:24,831 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-09-17 14:23:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:24,831 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-09-17 14:23:24,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 14:23:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-09-17 14:23:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 14:23:24,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:24,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:25,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:25,051 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:25,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-09-17 14:23:25,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:25,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146559277] [2020-09-17 14:23:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-17 14:23:25,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146559277] [2020-09-17 14:23:25,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205750219] [2020-09-17 14:23:25,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:25,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 14:23:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-17 14:23:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-17 14:23:25,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:25,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-09-17 14:23:25,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659525772] [2020-09-17 14:23:25,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 14:23:25,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:25,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 14:23:25,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-17 14:23:25,376 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-09-17 14:23:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:25,752 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-09-17 14:23:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 14:23:25,753 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-09-17 14:23:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:25,755 INFO L225 Difference]: With dead ends: 76 [2020-09-17 14:23:25,757 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 14:23:25,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:23:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 14:23:25,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-09-17 14:23:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 14:23:25,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-09-17 14:23:25,777 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-09-17 14:23:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:25,778 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-09-17 14:23:25,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 14:23:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-09-17 14:23:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 14:23:25,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:25,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:25,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:25,984 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:25,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:25,984 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-09-17 14:23:25,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:25,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741761300] [2020-09-17 14:23:25,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-17 14:23:26,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741761300] [2020-09-17 14:23:26,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761451579] [2020-09-17 14:23:26,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:26,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:23:26,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-17 14:23:26,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-17 14:23:26,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:26,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-09-17 14:23:26,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32478728] [2020-09-17 14:23:26,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:23:26,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:26,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:23:26,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:23:26,217 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 11 states. [2020-09-17 14:23:26,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:26,772 INFO L93 Difference]: Finished difference Result 102 states and 200 transitions. [2020-09-17 14:23:26,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 14:23:26,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-09-17 14:23:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:26,774 INFO L225 Difference]: With dead ends: 102 [2020-09-17 14:23:26,774 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 14:23:26,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2020-09-17 14:23:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 14:23:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-09-17 14:23:26,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 14:23:26,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 186 transitions. [2020-09-17 14:23:26,786 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 186 transitions. Word has length 19 [2020-09-17 14:23:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:26,787 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 186 transitions. [2020-09-17 14:23:26,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:23:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 186 transitions. [2020-09-17 14:23:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 14:23:26,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:26,789 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:27,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-17 14:23:27,003 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:27,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1553067533, now seen corresponding path program 5 times [2020-09-17 14:23:27,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:27,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865059706] [2020-09-17 14:23:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-17 14:23:27,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865059706] [2020-09-17 14:23:27,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191432083] [2020-09-17 14:23:27,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:27,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 14:23:27,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-17 14:23:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-17 14:23:27,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:27,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-09-17 14:23:27,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287126821] [2020-09-17 14:23:27,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 14:23:27,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 14:23:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-17 14:23:27,276 INFO L87 Difference]: Start difference. First operand 95 states and 186 transitions. Second operand 13 states. [2020-09-17 14:23:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:28,104 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2020-09-17 14:23:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 14:23:28,105 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-09-17 14:23:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:28,107 INFO L225 Difference]: With dead ends: 132 [2020-09-17 14:23:28,107 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 14:23:28,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=588, Invalid=1218, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 14:23:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 14:23:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-17 14:23:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-17 14:23:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 244 transitions. [2020-09-17 14:23:28,120 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 244 transitions. Word has length 22 [2020-09-17 14:23:28,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:28,120 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 244 transitions. [2020-09-17 14:23:28,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 14:23:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 244 transitions. [2020-09-17 14:23:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 14:23:28,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:28,122 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:28,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:28,331 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 390743231, now seen corresponding path program 6 times [2020-09-17 14:23:28,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:28,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895963372] [2020-09-17 14:23:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-17 14:23:28,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895963372] [2020-09-17 14:23:28,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056358553] [2020-09-17 14:23:28,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:28,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 14:23:28,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:28,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 14:23:28,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-17 14:23:28,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:28,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-09-17 14:23:28,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272380908] [2020-09-17 14:23:28,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 14:23:28,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:28,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 14:23:28,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-17 14:23:28,737 INFO L87 Difference]: Start difference. First operand 124 states and 244 transitions. Second operand 15 states. [2020-09-17 14:23:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:29,987 INFO L93 Difference]: Finished difference Result 166 states and 328 transitions. [2020-09-17 14:23:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-17 14:23:29,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-09-17 14:23:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:29,990 INFO L225 Difference]: With dead ends: 166 [2020-09-17 14:23:29,990 INFO L226 Difference]: Without dead ends: 166 [2020-09-17 14:23:29,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1008, Invalid=2184, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 14:23:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-17 14:23:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2020-09-17 14:23:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-17 14:23:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 310 transitions. [2020-09-17 14:23:30,005 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 310 transitions. Word has length 25 [2020-09-17 14:23:30,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:30,005 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 310 transitions. [2020-09-17 14:23:30,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 14:23:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 310 transitions. [2020-09-17 14:23:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 14:23:30,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:30,008 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:30,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:30,222 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1155941881, now seen corresponding path program 7 times [2020-09-17 14:23:30,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:30,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262216889] [2020-09-17 14:23:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 14:23:30,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262216889] [2020-09-17 14:23:30,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816652146] [2020-09-17 14:23:30,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:30,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 14:23:30,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 14:23:30,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:30,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 14:23:30,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629098276] [2020-09-17 14:23:30,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 14:23:30,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:30,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 14:23:30,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:23:30,586 INFO L87 Difference]: Start difference. First operand 157 states and 310 transitions. Second operand 11 states. [2020-09-17 14:23:30,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:30,641 INFO L93 Difference]: Finished difference Result 184 states and 364 transitions. [2020-09-17 14:23:30,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 14:23:30,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-17 14:23:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:30,644 INFO L225 Difference]: With dead ends: 184 [2020-09-17 14:23:30,645 INFO L226 Difference]: Without dead ends: 184 [2020-09-17 14:23:30,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-17 14:23:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-17 14:23:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2020-09-17 14:23:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-17 14:23:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 346 transitions. [2020-09-17 14:23:30,656 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 346 transitions. Word has length 28 [2020-09-17 14:23:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:30,656 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 346 transitions. [2020-09-17 14:23:30,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 14:23:30,656 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 346 transitions. [2020-09-17 14:23:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 14:23:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:30,658 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:30,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-17 14:23:30,874 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash -768099092, now seen corresponding path program 8 times [2020-09-17 14:23:30,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:30,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121726681] [2020-09-17 14:23:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 14:23:31,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121726681] [2020-09-17 14:23:31,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800395009] [2020-09-17 14:23:31,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:31,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:23:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:31,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:23:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 14:23:31,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:31,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 14:23:31,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099618441] [2020-09-17 14:23:31,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 14:23:31,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:31,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 14:23:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:23:31,169 INFO L87 Difference]: Start difference. First operand 175 states and 346 transitions. Second operand 12 states. [2020-09-17 14:23:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:31,218 INFO L93 Difference]: Finished difference Result 202 states and 400 transitions. [2020-09-17 14:23:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 14:23:31,225 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-17 14:23:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:31,226 INFO L225 Difference]: With dead ends: 202 [2020-09-17 14:23:31,226 INFO L226 Difference]: Without dead ends: 202 [2020-09-17 14:23:31,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-17 14:23:31,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-17 14:23:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 193. [2020-09-17 14:23:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-17 14:23:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 382 transitions. [2020-09-17 14:23:31,238 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 382 transitions. Word has length 30 [2020-09-17 14:23:31,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:31,243 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 382 transitions. [2020-09-17 14:23:31,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 14:23:31,244 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 382 transitions. [2020-09-17 14:23:31,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 14:23:31,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:31,248 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:31,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:31,449 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:31,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1359430431, now seen corresponding path program 9 times [2020-09-17 14:23:31,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:31,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183684175] [2020-09-17 14:23:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-17 14:23:31,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183684175] [2020-09-17 14:23:31,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223559071] [2020-09-17 14:23:31,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:31,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 14:23:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 14:23:31,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-17 14:23:31,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:31,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-09-17 14:23:31,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26349442] [2020-09-17 14:23:31,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 14:23:31,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 14:23:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-17 14:23:31,909 INFO L87 Difference]: Start difference. First operand 193 states and 382 transitions. Second operand 19 states. [2020-09-17 14:23:34,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:34,563 INFO L93 Difference]: Finished difference Result 244 states and 484 transitions. [2020-09-17 14:23:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-17 14:23:34,564 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-09-17 14:23:34,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:34,567 INFO L225 Difference]: With dead ends: 244 [2020-09-17 14:23:34,567 INFO L226 Difference]: Without dead ends: 244 [2020-09-17 14:23:34,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2020-09-17 14:23:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-17 14:23:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2020-09-17 14:23:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-17 14:23:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 464 transitions. [2020-09-17 14:23:34,581 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 464 transitions. Word has length 32 [2020-09-17 14:23:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:34,584 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 464 transitions. [2020-09-17 14:23:34,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 14:23:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 464 transitions. [2020-09-17 14:23:34,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-17 14:23:34,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:34,587 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:34,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:34,802 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:34,802 INFO L82 PathProgramCache]: Analyzing trace with hash -377330477, now seen corresponding path program 10 times [2020-09-17 14:23:34,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:34,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313555799] [2020-09-17 14:23:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-17 14:23:34,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313555799] [2020-09-17 14:23:34,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543798129] [2020-09-17 14:23:34,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:35,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:23:35,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:23:35,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-17 14:23:35,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:35,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-09-17 14:23:35,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900288362] [2020-09-17 14:23:35,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 14:23:35,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:35,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 14:23:35,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-09-17 14:23:35,236 INFO L87 Difference]: Start difference. First operand 234 states and 464 transitions. Second operand 21 states. [2020-09-17 14:23:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:38,900 INFO L93 Difference]: Finished difference Result 290 states and 576 transitions. [2020-09-17 14:23:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-17 14:23:38,905 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-09-17 14:23:38,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:38,907 INFO L225 Difference]: With dead ends: 290 [2020-09-17 14:23:38,908 INFO L226 Difference]: Without dead ends: 290 [2020-09-17 14:23:38,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3905 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3510, Invalid=8262, Unknown=0, NotChecked=0, Total=11772 [2020-09-17 14:23:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-17 14:23:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2020-09-17 14:23:38,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-09-17 14:23:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 554 transitions. [2020-09-17 14:23:38,920 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 554 transitions. Word has length 35 [2020-09-17 14:23:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:38,920 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 554 transitions. [2020-09-17 14:23:38,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 14:23:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 554 transitions. [2020-09-17 14:23:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-17 14:23:38,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:38,922 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:39,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-17 14:23:39,138 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:39,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1024091301, now seen corresponding path program 11 times [2020-09-17 14:23:39,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:39,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981685472] [2020-09-17 14:23:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:39,389 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-17 14:23:39,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981685472] [2020-09-17 14:23:39,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175212550] [2020-09-17 14:23:39,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:39,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 14:23:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 14:23:39,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-09-17 14:23:39,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:39,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-09-17 14:23:39,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934993364] [2020-09-17 14:23:39,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:23:39,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:39,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:23:39,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:23:39,740 INFO L87 Difference]: Start difference. First operand 279 states and 554 transitions. Second operand 23 states. [2020-09-17 14:23:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:44,778 INFO L93 Difference]: Finished difference Result 340 states and 676 transitions. [2020-09-17 14:23:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-17 14:23:44,779 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-09-17 14:23:44,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:44,782 INFO L225 Difference]: With dead ends: 340 [2020-09-17 14:23:44,782 INFO L226 Difference]: Without dead ends: 340 [2020-09-17 14:23:44,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5877 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5005, Invalid=12025, Unknown=0, NotChecked=0, Total=17030 [2020-09-17 14:23:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-17 14:23:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2020-09-17 14:23:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-09-17 14:23:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 652 transitions. [2020-09-17 14:23:44,797 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 652 transitions. Word has length 38 [2020-09-17 14:23:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:44,797 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 652 transitions. [2020-09-17 14:23:44,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:23:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 652 transitions. [2020-09-17 14:23:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-17 14:23:44,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:44,799 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:45,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-17 14:23:45,013 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:45,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1006259789, now seen corresponding path program 12 times [2020-09-17 14:23:45,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:45,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288233041] [2020-09-17 14:23:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-17 14:23:45,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288233041] [2020-09-17 14:23:45,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873553354] [2020-09-17 14:23:45,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:45,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 14:23:45,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 14:23:45,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-09-17 14:23:45,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:45,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2020-09-17 14:23:45,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493201338] [2020-09-17 14:23:45,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 14:23:45,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:45,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 14:23:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-17 14:23:45,627 INFO L87 Difference]: Start difference. First operand 328 states and 652 transitions. Second operand 25 states. [2020-09-17 14:23:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:52,316 INFO L93 Difference]: Finished difference Result 394 states and 784 transitions. [2020-09-17 14:23:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-09-17 14:23:52,317 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-09-17 14:23:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:52,319 INFO L225 Difference]: With dead ends: 394 [2020-09-17 14:23:52,320 INFO L226 Difference]: Without dead ends: 394 [2020-09-17 14:23:52,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8505 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6930, Invalid=16940, Unknown=0, NotChecked=0, Total=23870 [2020-09-17 14:23:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-17 14:23:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 381. [2020-09-17 14:23:52,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-09-17 14:23:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 758 transitions. [2020-09-17 14:23:52,337 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 758 transitions. Word has length 41 [2020-09-17 14:23:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:52,338 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 758 transitions. [2020-09-17 14:23:52,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 14:23:52,338 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 758 transitions. [2020-09-17 14:23:52,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-17 14:23:52,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:52,340 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:52,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-17 14:23:52,556 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 519022635, now seen corresponding path program 13 times [2020-09-17 14:23:52,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:52,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003122856] [2020-09-17 14:23:52,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 14:23:52,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003122856] [2020-09-17 14:23:52,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885636493] [2020-09-17 14:23:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:52,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 14:23:52,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 14:23:52,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:52,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 14:23:52,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89220166] [2020-09-17 14:23:52,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 14:23:52,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:52,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 14:23:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:23:52,956 INFO L87 Difference]: Start difference. First operand 381 states and 758 transitions. Second operand 17 states. [2020-09-17 14:23:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:53,051 INFO L93 Difference]: Finished difference Result 420 states and 836 transitions. [2020-09-17 14:23:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 14:23:53,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-09-17 14:23:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:53,055 INFO L225 Difference]: With dead ends: 420 [2020-09-17 14:23:53,055 INFO L226 Difference]: Without dead ends: 420 [2020-09-17 14:23:53,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-17 14:23:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-09-17 14:23:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 407. [2020-09-17 14:23:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-09-17 14:23:53,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 810 transitions. [2020-09-17 14:23:53,067 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 810 transitions. Word has length 44 [2020-09-17 14:23:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:53,067 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 810 transitions. [2020-09-17 14:23:53,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 14:23:53,068 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 810 transitions. [2020-09-17 14:23:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-17 14:23:53,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:53,070 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:53,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:53,285 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -942483170, now seen corresponding path program 14 times [2020-09-17 14:23:53,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:53,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042379927] [2020-09-17 14:23:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 14:23:53,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042379927] [2020-09-17 14:23:53,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470934221] [2020-09-17 14:23:53,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:53,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:23:53,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:53,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:23:53,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 14:23:53,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:53,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 14:23:53,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491262689] [2020-09-17 14:23:53,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:23:53,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:53,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:23:53,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:23:53,750 INFO L87 Difference]: Start difference. First operand 407 states and 810 transitions. Second operand 18 states. [2020-09-17 14:23:53,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:23:53,838 INFO L93 Difference]: Finished difference Result 446 states and 888 transitions. [2020-09-17 14:23:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:23:53,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-09-17 14:23:53,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:23:53,841 INFO L225 Difference]: With dead ends: 446 [2020-09-17 14:23:53,842 INFO L226 Difference]: Without dead ends: 446 [2020-09-17 14:23:53,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:23:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-09-17 14:23:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2020-09-17 14:23:53,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-09-17 14:23:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 862 transitions. [2020-09-17 14:23:53,856 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 862 transitions. Word has length 46 [2020-09-17 14:23:53,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:23:53,857 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 862 transitions. [2020-09-17 14:23:53,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:23:53,857 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 862 transitions. [2020-09-17 14:23:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-17 14:23:53,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:23:53,859 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:23:54,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 14:23:54,074 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:23:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:23:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash -995255983, now seen corresponding path program 15 times [2020-09-17 14:23:54,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:23:54,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457105123] [2020-09-17 14:23:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:23:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:23:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-17 14:23:54,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457105123] [2020-09-17 14:23:54,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714689398] [2020-09-17 14:23:54,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:23:54,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 14:23:54,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:23:54,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 14:23:54,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:23:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-09-17 14:23:54,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:23:54,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2020-09-17 14:23:54,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14475094] [2020-09-17 14:23:54,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 14:23:54,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:23:54,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 14:23:54,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-09-17 14:23:54,810 INFO L87 Difference]: Start difference. First operand 433 states and 862 transitions. Second operand 29 states. [2020-09-17 14:24:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:24:06,015 INFO L93 Difference]: Finished difference Result 508 states and 1012 transitions. [2020-09-17 14:24:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-09-17 14:24:06,021 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-09-17 14:24:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:24:06,024 INFO L225 Difference]: With dead ends: 508 [2020-09-17 14:24:06,024 INFO L226 Difference]: Without dead ends: 508 [2020-09-17 14:24:06,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15565 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=11934, Invalid=29886, Unknown=0, NotChecked=0, Total=41820 [2020-09-17 14:24:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-09-17 14:24:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2020-09-17 14:24:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-09-17 14:24:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 984 transitions. [2020-09-17 14:24:06,040 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 984 transitions. Word has length 48 [2020-09-17 14:24:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:24:06,040 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 984 transitions. [2020-09-17 14:24:06,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 14:24:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 984 transitions. [2020-09-17 14:24:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-17 14:24:06,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:24:06,042 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:24:06,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-17 14:24:06,256 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:24:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:24:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash -954639647, now seen corresponding path program 16 times [2020-09-17 14:24:06,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:24:06,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399467091] [2020-09-17 14:24:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:24:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-17 14:24:06,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399467091] [2020-09-17 14:24:06,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070380417] [2020-09-17 14:24:06,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:24:06,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:24:06,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:24:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 14:24:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:24:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-17 14:24:06,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:24:06,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 14:24:06,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092777251] [2020-09-17 14:24:06,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 14:24:06,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:24:06,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 14:24:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:24:06,752 INFO L87 Difference]: Start difference. First operand 494 states and 984 transitions. Second operand 20 states. [2020-09-17 14:24:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:24:06,848 INFO L93 Difference]: Finished difference Result 536 states and 1068 transitions. [2020-09-17 14:24:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 14:24:06,849 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-09-17 14:24:06,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:24:06,853 INFO L225 Difference]: With dead ends: 536 [2020-09-17 14:24:06,853 INFO L226 Difference]: Without dead ends: 536 [2020-09-17 14:24:06,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-17 14:24:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-17 14:24:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-17 14:24:06,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-17 14:24:06,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1040 transitions. [2020-09-17 14:24:06,866 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1040 transitions. Word has length 51 [2020-09-17 14:24:06,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:24:06,866 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 1040 transitions. [2020-09-17 14:24:06,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 14:24:06,867 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1040 transitions. [2020-09-17 14:24:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-17 14:24:06,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:24:06,869 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:24:07,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 14:24:07,082 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:24:07,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:24:07,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1140997490, now seen corresponding path program 17 times [2020-09-17 14:24:07,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:24:07,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044394174] [2020-09-17 14:24:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:24:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-17 14:24:07,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044394174] [2020-09-17 14:24:07,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526098895] [2020-09-17 14:24:07,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:24:07,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-09-17 14:24:07,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:24:07,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 14:24:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:24:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-09-17 14:24:07,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:24:07,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2020-09-17 14:24:07,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315168993] [2020-09-17 14:24:07,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-17 14:24:07,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:24:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-17 14:24:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-09-17 14:24:07,892 INFO L87 Difference]: Start difference. First operand 522 states and 1040 transitions. Second operand 32 states. [2020-09-17 14:24:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:24:24,433 INFO L93 Difference]: Finished difference Result 604 states and 1204 transitions. [2020-09-17 14:24:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2020-09-17 14:24:24,434 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 53 [2020-09-17 14:24:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:24:24,439 INFO L225 Difference]: With dead ends: 604 [2020-09-17 14:24:24,439 INFO L226 Difference]: Without dead ends: 604 [2020-09-17 14:24:24,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23424 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=17290, Invalid=43966, Unknown=0, NotChecked=0, Total=61256 [2020-09-17 14:24:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-17 14:24:24,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2020-09-17 14:24:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-09-17 14:24:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1174 transitions. [2020-09-17 14:24:24,458 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1174 transitions. Word has length 53 [2020-09-17 14:24:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:24:24,458 INFO L479 AbstractCegarLoop]: Abstraction has 589 states and 1174 transitions. [2020-09-17 14:24:24,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-17 14:24:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1174 transitions. [2020-09-17 14:24:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-17 14:24:24,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:24:24,461 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:24:24,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:24:24,675 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:24:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:24:24,676 INFO L82 PathProgramCache]: Analyzing trace with hash 625395594, now seen corresponding path program 18 times [2020-09-17 14:24:24,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:24:24,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263717579] [2020-09-17 14:24:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:24:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-17 14:24:25,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263717579] [2020-09-17 14:24:25,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530578649] [2020-09-17 14:24:25,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:24:25,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-17 14:24:25,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:24:25,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 14:24:25,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:24:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-09-17 14:24:25,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:24:25,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2020-09-17 14:24:25,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774175575] [2020-09-17 14:24:25,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-17 14:24:25,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:24:25,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-17 14:24:25,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 14:24:25,758 INFO L87 Difference]: Start difference. First operand 589 states and 1174 transitions. Second operand 34 states. [2020-09-17 14:24:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:24:47,540 INFO L93 Difference]: Finished difference Result 676 states and 1348 transitions. [2020-09-17 14:24:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2020-09-17 14:24:47,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-09-17 14:24:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:24:47,545 INFO L225 Difference]: With dead ends: 676 [2020-09-17 14:24:47,545 INFO L226 Difference]: Without dead ends: 676 [2020-09-17 14:24:47,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30615 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=22050, Invalid=56630, Unknown=0, NotChecked=0, Total=78680 [2020-09-17 14:24:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-09-17 14:24:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2020-09-17 14:24:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2020-09-17 14:24:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1316 transitions. [2020-09-17 14:24:47,564 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1316 transitions. Word has length 56 [2020-09-17 14:24:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:24:47,565 INFO L479 AbstractCegarLoop]: Abstraction has 660 states and 1316 transitions. [2020-09-17 14:24:47,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-17 14:24:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1316 transitions. [2020-09-17 14:24:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-17 14:24:47,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:24:47,567 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:24:47,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:24:47,783 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:24:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:24:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1598900536, now seen corresponding path program 19 times [2020-09-17 14:24:47,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:24:47,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339984133] [2020-09-17 14:24:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:24:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-17 14:24:48,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339984133] [2020-09-17 14:24:48,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165687186] [2020-09-17 14:24:48,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:24:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 14:24:48,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:24:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-17 14:24:48,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:24:48,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 14:24:48,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402038415] [2020-09-17 14:24:48,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 14:24:48,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:24:48,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 14:24:48,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:24:48,431 INFO L87 Difference]: Start difference. First operand 660 states and 1316 transitions. Second operand 23 states. [2020-09-17 14:24:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:24:48,565 INFO L93 Difference]: Finished difference Result 692 states and 1380 transitions. [2020-09-17 14:24:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 14:24:48,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-09-17 14:24:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:24:48,569 INFO L225 Difference]: With dead ends: 692 [2020-09-17 14:24:48,570 INFO L226 Difference]: Without dead ends: 692 [2020-09-17 14:24:48,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-17 14:24:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-09-17 14:24:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2020-09-17 14:24:48,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-09-17 14:24:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1380 transitions. [2020-09-17 14:24:48,590 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1380 transitions. Word has length 59 [2020-09-17 14:24:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:24:48,590 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 1380 transitions. [2020-09-17 14:24:48,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 14:24:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1380 transitions. [2020-09-17 14:24:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-17 14:24:48,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:24:48,593 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:24:48,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-17 14:24:48,807 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:24:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:24:48,808 INFO L82 PathProgramCache]: Analyzing trace with hash 746529141, now seen corresponding path program 20 times [2020-09-17 14:24:48,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:24:48,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859504631] [2020-09-17 14:24:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:24:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:24:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-17 14:24:49,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859504631] [2020-09-17 14:24:49,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54874532] [2020-09-17 14:24:49,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:24:49,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 14:24:49,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:24:49,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2020-09-17 14:24:49,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:24:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:24:52,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:24:52,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 54] total 70 [2020-09-17 14:24:52,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846697926] [2020-09-17 14:24:52,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-17 14:24:52,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:24:52,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-17 14:24:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 14:24:52,094 INFO L87 Difference]: Start difference. First operand 692 states and 1380 transitions. Second operand 70 states. [2020-09-17 14:28:33,928 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification that was a NOOP. DAG size: 9 [2020-09-17 14:33:39,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:33:39,657 INFO L93 Difference]: Finished difference Result 38046 states and 76072 transitions. [2020-09-17 14:33:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3033 states. [2020-09-17 14:33:39,661 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 61 [2020-09-17 14:33:39,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:33:39,787 INFO L225 Difference]: With dead ends: 38046 [2020-09-17 14:33:39,787 INFO L226 Difference]: Without dead ends: 38018 [2020-09-17 14:33:40,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3485 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 3044 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6217742 ImplicationChecksByTransitivity, 474.5s TimeCoverageRelationStatistics Valid=2254412, Invalid=7020658, Unknown=0, NotChecked=0, Total=9275070 [2020-09-17 14:33:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38018 states. [2020-09-17 14:33:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38018 to 1389. [2020-09-17 14:33:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1389 states. [2020-09-17 14:33:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 2931 transitions. [2020-09-17 14:33:40,395 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 2931 transitions. Word has length 61 [2020-09-17 14:33:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:33:40,396 INFO L479 AbstractCegarLoop]: Abstraction has 1389 states and 2931 transitions. [2020-09-17 14:33:40,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-17 14:33:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 2931 transitions. [2020-09-17 14:33:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-17 14:33:40,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:33:40,400 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:33:40,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-17 14:33:40,615 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:33:40,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:33:40,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1697933392, now seen corresponding path program 21 times [2020-09-17 14:33:40,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:33:40,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956209197] [2020-09-17 14:33:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:33:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:33:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-17 14:33:41,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956209197] [2020-09-17 14:33:41,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853858540] [2020-09-17 14:33:41,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:33:41,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 14:33:41,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:33:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 14:33:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:33:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 20 proven. 105 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-17 14:33:41,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:33:41,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 14:33:41,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936061425] [2020-09-17 14:33:41,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 14:33:41,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:33:41,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 14:33:41,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:33:41,345 INFO L87 Difference]: Start difference. First operand 1389 states and 2931 transitions. Second operand 18 states. [2020-09-17 14:33:41,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 14:33:41,554 INFO L93 Difference]: Finished difference Result 1604 states and 3256 transitions. [2020-09-17 14:33:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 14:33:41,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-09-17 14:33:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 14:33:41,562 INFO L225 Difference]: With dead ends: 1604 [2020-09-17 14:33:41,562 INFO L226 Difference]: Without dead ends: 1604 [2020-09-17 14:33:41,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-17 14:33:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2020-09-17 14:33:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1471. [2020-09-17 14:33:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1471 states. [2020-09-17 14:33:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 3095 transitions. [2020-09-17 14:33:41,589 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 3095 transitions. Word has length 62 [2020-09-17 14:33:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 14:33:41,589 INFO L479 AbstractCegarLoop]: Abstraction has 1471 states and 3095 transitions. [2020-09-17 14:33:41,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 14:33:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 3095 transitions. [2020-09-17 14:33:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-17 14:33:41,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 14:33:41,593 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 14:33:41,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:33:41,807 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 14:33:41,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 14:33:41,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1126694101, now seen corresponding path program 22 times [2020-09-17 14:33:41,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 14:33:41,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397779888] [2020-09-17 14:33:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 14:33:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 14:33:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 20 proven. 120 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-17 14:33:42,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397779888] [2020-09-17 14:33:42,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599542070] [2020-09-17 14:33:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 14:33:42,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 14:33:42,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 14:33:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2020-09-17 14:33:42,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 14:33:43,909 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-09-17 14:33:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 14:33:49,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 14:33:49,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 56] total 74 [2020-09-17 14:33:49,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460110308] [2020-09-17 14:33:49,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-17 14:33:49,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 14:33:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-17 14:33:49,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=4317, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 14:33:49,578 INFO L87 Difference]: Start difference. First operand 1471 states and 3095 transitions. Second operand 74 states.