/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 0.1.25-507b705 [2020-09-11 20:13:04,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 20:13:04,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 20:13:04,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 20:13:04,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 20:13:04,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 20:13:04,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 20:13:04,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 20:13:04,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 20:13:04,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 20:13:04,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 20:13:04,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 20:13:04,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 20:13:04,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 20:13:04,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 20:13:04,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 20:13:04,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 20:13:04,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 20:13:04,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 20:13:04,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 20:13:04,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 20:13:04,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 20:13:04,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 20:13:04,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 20:13:04,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 20:13:04,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 20:13:04,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 20:13:04,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 20:13:04,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 20:13:04,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 20:13:04,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 20:13:04,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 20:13:04,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 20:13:04,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 20:13:04,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 20:13:04,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 20:13:04,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 20:13:04,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 20:13:04,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 20:13:04,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 20:13:04,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 20:13:04,255 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-11 20:13:04,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 20:13:04,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 20:13:04,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 20:13:04,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 20:13:04,308 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 20:13:04,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 20:13:04,308 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 20:13:04,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 20:13:04,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 20:13:04,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 20:13:04,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 20:13:04,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 20:13:04,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 20:13:04,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 20:13:04,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 20:13:04,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 20:13:04,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 20:13:04,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 20:13:04,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 20:13:04,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 20:13:04,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 20:13:04,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 20:13:04,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 20:13:04,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 20:13:04,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 20:13:04,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 20:13:04,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 20:13:04,314 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 20:13:04,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 20:13:04,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 20:13:04,830 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 20:13:04,834 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 20:13:04,836 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 20:13:04,837 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 20:13:04,838 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-11 20:13:04,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e07229c3/d45ccf828be848d49926f44208364a3d/FLAGf0bc2910a [2020-09-11 20:13:05,692 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 20:13:05,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-2.i [2020-09-11 20:13:05,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e07229c3/d45ccf828be848d49926f44208364a3d/FLAGf0bc2910a [2020-09-11 20:13:05,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e07229c3/d45ccf828be848d49926f44208364a3d [2020-09-11 20:13:05,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 20:13:05,840 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 20:13:05,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 20:13:05,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 20:13:05,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 20:13:05,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:13:05" (1/1) ... [2020-09-11 20:13:05,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3365e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:05, skipping insertion in model container [2020-09-11 20:13:05,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:13:05" (1/1) ... [2020-09-11 20:13:05,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 20:13:05,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 20:13:06,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:13:06,679 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 20:13:06,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:13:07,004 INFO L208 MainTranslator]: Completed translation [2020-09-11 20:13:07,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07 WrapperNode [2020-09-11 20:13:07,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 20:13:07,008 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 20:13:07,008 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 20:13:07,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 20:13:07,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,047 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 20:13:07,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 20:13:07,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 20:13:07,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 20:13:07,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,101 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... [2020-09-11 20:13:07,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 20:13:07,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 20:13:07,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 20:13:07,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 20:13:07,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 20:13:07,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 20:13:07,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 20:13:07,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-11 20:13:07,216 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_datarace [2020-09-11 20:13:07,216 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_datarace [2020-09-11 20:13:07,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 20:13:07,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 20:13:07,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 20:13:07,220 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 20:13:07,715 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 20:13:07,715 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-11 20:13:07,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:13:07 BoogieIcfgContainer [2020-09-11 20:13:07,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 20:13:07,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 20:13:07,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 20:13:07,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 20:13:07,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:13:05" (1/3) ... [2020-09-11 20:13:07,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139b088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:13:07, skipping insertion in model container [2020-09-11 20:13:07,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:13:07" (2/3) ... [2020-09-11 20:13:07,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@139b088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:13:07, skipping insertion in model container [2020-09-11 20:13:07,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:13:07" (3/3) ... [2020-09-11 20:13:07,731 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-2.i [2020-09-11 20:13:07,744 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 20:13:07,744 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 20:13:07,755 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 20:13:07,757 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 20:13:07,785 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,785 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,786 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,786 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,786 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,787 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,788 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,788 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,788 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,789 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,789 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,789 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,790 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,790 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,790 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,790 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,795 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,795 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,796 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,796 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,796 WARN L313 ript$VariableManager]: TermVariabe |thread_function_dataraceThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,796 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,797 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,797 WARN L313 ript$VariableManager]: TermVariabe thread_function_dataraceThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:13:07,828 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-11 20:13:07,855 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 20:13:07,855 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 20:13:07,856 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 20:13:07,856 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 20:13:07,856 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 20:13:07,856 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 20:13:07,856 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 20:13:07,856 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 20:13:07,875 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 178 flow [2020-09-11 20:13:07,878 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-11 20:13:07,935 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-11 20:13:07,936 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-11 20:13:07,942 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. [2020-09-11 20:13:07,945 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 178 flow [2020-09-11 20:13:07,976 INFO L129 PetriNetUnfolder]: 7/84 cut-off events. [2020-09-11 20:13:07,976 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-11 20:13:07,977 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. [2020-09-11 20:13:07,979 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 640 [2020-09-11 20:13:07,980 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 20:13:09,469 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-09-11 20:13:09,695 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-11 20:13:10,308 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-09-11 20:13:10,661 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-09-11 20:13:11,270 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-09-11 20:13:11,750 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-09-11 20:13:13,354 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 149 DAG size of output: 131 [2020-09-11 20:13:14,088 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-09-11 20:13:14,092 INFO L206 etLargeBlockEncoding]: Checked pairs total: 510 [2020-09-11 20:13:14,093 INFO L214 etLargeBlockEncoding]: Total number of compositions: 78 [2020-09-11 20:13:14,100 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 13 transitions, 34 flow [2020-09-11 20:13:14,111 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 17 states. [2020-09-11 20:13:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-09-11 20:13:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 20:13:14,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:14,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:14,124 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:14,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1450466956, now seen corresponding path program 1 times [2020-09-11 20:13:14,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:14,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052398205] [2020-09-11 20:13:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:14,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052398205] [2020-09-11 20:13:14,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:13:14,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:13:14,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021008042] [2020-09-11 20:13:14,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 20:13:14,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:14,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 20:13:14,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 20:13:14,553 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-09-11 20:13:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:14,604 INFO L93 Difference]: Finished difference Result 20 states and 36 transitions. [2020-09-11 20:13:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 20:13:14,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-11 20:13:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:14,628 INFO L225 Difference]: With dead ends: 20 [2020-09-11 20:13:14,628 INFO L226 Difference]: Without dead ends: 20 [2020-09-11 20:13:14,630 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 [2020-09-11 20:13:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-11 20:13:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-11 20:13:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-11 20:13:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 36 transitions. [2020-09-11 20:13:14,685 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 36 transitions. Word has length 8 [2020-09-11 20:13:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:14,685 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 36 transitions. [2020-09-11 20:13:14,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 20:13:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 36 transitions. [2020-09-11 20:13:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 20:13:14,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:14,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:14,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 20:13:14,688 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:14,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:14,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1984436175, now seen corresponding path program 1 times [2020-09-11 20:13:14,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:14,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470003234] [2020-09-11 20:13:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:14,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470003234] [2020-09-11 20:13:14,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215348578] [2020-09-11 20:13:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:14,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-11 20:13:14,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-11 20:13:14,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-11 20:13:14,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-09-11 20:13:14,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468240676] [2020-09-11 20:13:14,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 20:13:14,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:14,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 20:13:14,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 20:13:14,915 INFO L87 Difference]: Start difference. First operand 20 states and 36 transitions. Second operand 3 states. [2020-09-11 20:13:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:14,934 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2020-09-11 20:13:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 20:13:14,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-09-11 20:13:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:14,937 INFO L225 Difference]: With dead ends: 28 [2020-09-11 20:13:14,937 INFO L226 Difference]: Without dead ends: 28 [2020-09-11 20:13:14,938 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 [2020-09-11 20:13:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-11 20:13:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-09-11 20:13:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-11 20:13:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 44 transitions. [2020-09-11 20:13:14,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 44 transitions. Word has length 9 [2020-09-11 20:13:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:14,945 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 44 transitions. [2020-09-11 20:13:14,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 20:13:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 44 transitions. [2020-09-11 20:13:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 20:13:14,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:14,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:15,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-11 20:13:15,162 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:15,163 INFO L82 PathProgramCache]: Analyzing trace with hash -436238306, now seen corresponding path program 1 times [2020-09-11 20:13:15,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:15,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682530855] [2020-09-11 20:13:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:13:15,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682530855] [2020-09-11 20:13:15,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102038868] [2020-09-11 20:13:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:15,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-09-11 20:13:15,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-11 20:13:15,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:15,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-09-11 20:13:15,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118840981] [2020-09-11 20:13:15,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 20:13:15,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 20:13:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 20:13:15,391 INFO L87 Difference]: Start difference. First operand 24 states and 44 transitions. Second operand 6 states. [2020-09-11 20:13:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:15,537 INFO L93 Difference]: Finished difference Result 44 states and 84 transitions. [2020-09-11 20:13:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 20:13:15,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-09-11 20:13:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:15,539 INFO L225 Difference]: With dead ends: 44 [2020-09-11 20:13:15,539 INFO L226 Difference]: Without dead ends: 44 [2020-09-11 20:13:15,540 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 [2020-09-11 20:13:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-11 20:13:15,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-09-11 20:13:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-11 20:13:15,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2020-09-11 20:13:15,554 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 11 [2020-09-11 20:13:15,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:15,555 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2020-09-11 20:13:15,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 20:13:15,555 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2020-09-11 20:13:15,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 20:13:15,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:15,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:15,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:15,771 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1899195462, now seen corresponding path program 2 times [2020-09-11 20:13:15,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:15,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515821602] [2020-09-11 20:13:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-11 20:13:15,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515821602] [2020-09-11 20:13:15,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094884094] [2020-09-11 20:13:15,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:15,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:15,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:15,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-11 20:13:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-11 20:13:15,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:15,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 20:13:15,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601708651] [2020-09-11 20:13:15,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 20:13:15,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 20:13:15,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-11 20:13:15,971 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand 6 states. [2020-09-11 20:13:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:16,000 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2020-09-11 20:13:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 20:13:16,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-09-11 20:13:16,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:16,002 INFO L225 Difference]: With dead ends: 54 [2020-09-11 20:13:16,002 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 20:13:16,003 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 [2020-09-11 20:13:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 20:13:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2020-09-11 20:13:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 20:13:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2020-09-11 20:13:16,011 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 14 [2020-09-11 20:13:16,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:16,012 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2020-09-11 20:13:16,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 20:13:16,012 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2020-09-11 20:13:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 20:13:16,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:16,013 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:16,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:16,228 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:16,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1378033683, now seen corresponding path program 3 times [2020-09-11 20:13:16,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:16,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787804142] [2020-09-11 20:13:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-11 20:13:16,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787804142] [2020-09-11 20:13:16,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935461007] [2020-09-11 20:13:16,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:16,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 20:13:16,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:16,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-11 20:13:16,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-11 20:13:16,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:16,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-09-11 20:13:16,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031532936] [2020-09-11 20:13:16,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 20:13:16,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:16,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 20:13:16,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:13:16,438 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand 9 states. [2020-09-11 20:13:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:16,743 INFO L93 Difference]: Finished difference Result 76 states and 148 transitions. [2020-09-11 20:13:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 20:13:16,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-09-11 20:13:16,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:16,745 INFO L225 Difference]: With dead ends: 76 [2020-09-11 20:13:16,745 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 20:13:16,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:13:16,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 20:13:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-09-11 20:13:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 20:13:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 136 transitions. [2020-09-11 20:13:16,758 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 136 transitions. Word has length 16 [2020-09-11 20:13:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:16,759 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 136 transitions. [2020-09-11 20:13:16,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 20:13:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 136 transitions. [2020-09-11 20:13:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 20:13:16,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:16,760 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:16,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:16,962 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:16,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:16,963 INFO L82 PathProgramCache]: Analyzing trace with hash -115221563, now seen corresponding path program 4 times [2020-09-11 20:13:16,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:16,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105693670] [2020-09-11 20:13:16,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-09-11 20:13:17,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105693670] [2020-09-11 20:13:17,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570985707] [2020-09-11 20:13:17,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:17,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:13:17,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:17,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-11 20:13:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-11 20:13:17,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:17,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2020-09-11 20:13:17,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917976226] [2020-09-11 20:13:17,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:13:17,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:17,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:13:17,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:13:17,266 INFO L87 Difference]: Start difference. First operand 70 states and 136 transitions. Second operand 11 states. [2020-09-11 20:13:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:17,799 INFO L93 Difference]: Finished difference Result 102 states and 200 transitions. [2020-09-11 20:13:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 20:13:17,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-09-11 20:13:17,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:17,803 INFO L225 Difference]: With dead ends: 102 [2020-09-11 20:13:17,804 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 20:13:17,805 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 [2020-09-11 20:13:17,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 20:13:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2020-09-11 20:13:17,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-11 20:13:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 186 transitions. [2020-09-11 20:13:17,816 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 186 transitions. Word has length 19 [2020-09-11 20:13:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:17,817 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 186 transitions. [2020-09-11 20:13:17,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:13:17,817 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 186 transitions. [2020-09-11 20:13:17,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 20:13:17,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:17,818 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:18,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 20:13:18,033 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1553067533, now seen corresponding path program 5 times [2020-09-11 20:13:18,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:18,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798120405] [2020-09-11 20:13:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-11 20:13:18,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798120405] [2020-09-11 20:13:18,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249237637] [2020-09-11 20:13:18,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:18,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 20:13:18,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:18,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-11 20:13:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-11 20:13:18,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:18,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-09-11 20:13:18,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882930699] [2020-09-11 20:13:18,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 20:13:18,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:18,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 20:13:18,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 20:13:18,378 INFO L87 Difference]: Start difference. First operand 95 states and 186 transitions. Second operand 13 states. [2020-09-11 20:13:19,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:19,229 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2020-09-11 20:13:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-11 20:13:19,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-09-11 20:13:19,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:19,233 INFO L225 Difference]: With dead ends: 132 [2020-09-11 20:13:19,233 INFO L226 Difference]: Without dead ends: 132 [2020-09-11 20:13:19,235 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 [2020-09-11 20:13:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-11 20:13:19,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-11 20:13:19,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 20:13:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 244 transitions. [2020-09-11 20:13:19,247 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 244 transitions. Word has length 22 [2020-09-11 20:13:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:19,247 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 244 transitions. [2020-09-11 20:13:19,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 20:13:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 244 transitions. [2020-09-11 20:13:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 20:13:19,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:19,249 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:19,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:19,463 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash 390743231, now seen corresponding path program 6 times [2020-09-11 20:13:19,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:19,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609715008] [2020-09-11 20:13:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-11 20:13:19,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609715008] [2020-09-11 20:13:19,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017939324] [2020-09-11 20:13:19,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:19,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 20:13:19,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:19,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 20:13:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-09-11 20:13:19,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:19,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-09-11 20:13:19,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219940037] [2020-09-11 20:13:19,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 20:13:19,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 20:13:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 20:13:19,836 INFO L87 Difference]: Start difference. First operand 124 states and 244 transitions. Second operand 15 states. [2020-09-11 20:13:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:21,073 INFO L93 Difference]: Finished difference Result 166 states and 328 transitions. [2020-09-11 20:13:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-11 20:13:21,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-09-11 20:13:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:21,075 INFO L225 Difference]: With dead ends: 166 [2020-09-11 20:13:21,076 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 20:13:21,078 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 [2020-09-11 20:13:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 20:13:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 157. [2020-09-11 20:13:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-11 20:13:21,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 310 transitions. [2020-09-11 20:13:21,089 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 310 transitions. Word has length 25 [2020-09-11 20:13:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:21,089 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 310 transitions. [2020-09-11 20:13:21,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 20:13:21,090 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 310 transitions. [2020-09-11 20:13:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-11 20:13:21,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:21,092 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:21,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:21,307 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:21,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:21,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1155941881, now seen corresponding path program 7 times [2020-09-11 20:13:21,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:21,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813687312] [2020-09-11 20:13:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 20:13:21,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813687312] [2020-09-11 20:13:21,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946047262] [2020-09-11 20:13:21,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:21,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 20:13:21,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 20:13:21,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:21,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 20:13:21,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308641611] [2020-09-11 20:13:21,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 20:13:21,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:21,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 20:13:21,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-09-11 20:13:21,589 INFO L87 Difference]: Start difference. First operand 157 states and 310 transitions. Second operand 11 states. [2020-09-11 20:13:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:21,641 INFO L93 Difference]: Finished difference Result 184 states and 364 transitions. [2020-09-11 20:13:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 20:13:21,642 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-11 20:13:21,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:21,643 INFO L225 Difference]: With dead ends: 184 [2020-09-11 20:13:21,643 INFO L226 Difference]: Without dead ends: 184 [2020-09-11 20:13:21,644 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 [2020-09-11 20:13:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-11 20:13:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2020-09-11 20:13:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-11 20:13:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 346 transitions. [2020-09-11 20:13:21,653 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 346 transitions. Word has length 28 [2020-09-11 20:13:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:21,654 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 346 transitions. [2020-09-11 20:13:21,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 20:13:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 346 transitions. [2020-09-11 20:13:21,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-11 20:13:21,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:21,656 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:21,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-09-11 20:13:21,867 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash -768099092, now seen corresponding path program 8 times [2020-09-11 20:13:21,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:21,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11640288] [2020-09-11 20:13:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 20:13:22,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11640288] [2020-09-11 20:13:22,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244848933] [2020-09-11 20:13:22,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:22,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:22,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:13:22,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 20:13:22,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:22,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 20:13:22,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082651444] [2020-09-11 20:13:22,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 20:13:22,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:22,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 20:13:22,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:13:22,176 INFO L87 Difference]: Start difference. First operand 175 states and 346 transitions. Second operand 12 states. [2020-09-11 20:13:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:22,222 INFO L93 Difference]: Finished difference Result 202 states and 400 transitions. [2020-09-11 20:13:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 20:13:22,223 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-11 20:13:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:22,224 INFO L225 Difference]: With dead ends: 202 [2020-09-11 20:13:22,224 INFO L226 Difference]: Without dead ends: 202 [2020-09-11 20:13:22,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-09-11 20:13:22,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-11 20:13:22,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 193. [2020-09-11 20:13:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-09-11 20:13:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 382 transitions. [2020-09-11 20:13:22,233 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 382 transitions. Word has length 30 [2020-09-11 20:13:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:22,233 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 382 transitions. [2020-09-11 20:13:22,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 20:13:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 382 transitions. [2020-09-11 20:13:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-11 20:13:22,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:22,236 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:22,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:22,450 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:22,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:22,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1359430431, now seen corresponding path program 9 times [2020-09-11 20:13:22,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:22,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357485372] [2020-09-11 20:13:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-11 20:13:22,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357485372] [2020-09-11 20:13:22,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907159807] [2020-09-11 20:13:22,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:22,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 20:13:22,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:22,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 20:13:22,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-09-11 20:13:22,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:22,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2020-09-11 20:13:22,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254450965] [2020-09-11 20:13:22,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 20:13:22,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:22,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 20:13:22,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-11 20:13:22,891 INFO L87 Difference]: Start difference. First operand 193 states and 382 transitions. Second operand 19 states. [2020-09-11 20:13:25,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:25,438 INFO L93 Difference]: Finished difference Result 244 states and 484 transitions. [2020-09-11 20:13:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-11 20:13:25,439 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-09-11 20:13:25,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:25,440 INFO L225 Difference]: With dead ends: 244 [2020-09-11 20:13:25,441 INFO L226 Difference]: Without dead ends: 244 [2020-09-11 20:13:25,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2020-09-11 20:13:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-11 20:13:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2020-09-11 20:13:25,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-11 20:13:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 464 transitions. [2020-09-11 20:13:25,451 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 464 transitions. Word has length 32 [2020-09-11 20:13:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:25,451 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 464 transitions. [2020-09-11 20:13:25,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 20:13:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 464 transitions. [2020-09-11 20:13:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-11 20:13:25,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:25,454 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:25,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:25,668 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash -377330477, now seen corresponding path program 10 times [2020-09-11 20:13:25,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:25,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098545051] [2020-09-11 20:13:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-11 20:13:25,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098545051] [2020-09-11 20:13:25,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537027681] [2020-09-11 20:13:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:25,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:13:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:25,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:13:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-09-11 20:13:26,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:26,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-09-11 20:13:26,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754760594] [2020-09-11 20:13:26,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 20:13:26,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:26,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 20:13:26,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2020-09-11 20:13:26,124 INFO L87 Difference]: Start difference. First operand 234 states and 464 transitions. Second operand 21 states. [2020-09-11 20:13:29,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:29,748 INFO L93 Difference]: Finished difference Result 290 states and 576 transitions. [2020-09-11 20:13:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-11 20:13:29,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-09-11 20:13:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:29,751 INFO L225 Difference]: With dead ends: 290 [2020-09-11 20:13:29,751 INFO L226 Difference]: Without dead ends: 290 [2020-09-11 20:13:29,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3905 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3510, Invalid=8262, Unknown=0, NotChecked=0, Total=11772 [2020-09-11 20:13:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-11 20:13:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 279. [2020-09-11 20:13:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-09-11 20:13:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 554 transitions. [2020-09-11 20:13:29,763 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 554 transitions. Word has length 35 [2020-09-11 20:13:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:29,764 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 554 transitions. [2020-09-11 20:13:29,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 20:13:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 554 transitions. [2020-09-11 20:13:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-11 20:13:29,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:29,768 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:29,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-11 20:13:29,975 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:29,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1024091301, now seen corresponding path program 11 times [2020-09-11 20:13:29,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:29,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898188714] [2020-09-11 20:13:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-09-11 20:13:30,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898188714] [2020-09-11 20:13:30,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283790842] [2020-09-11 20:13:30,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:30,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-11 20:13:30,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:30,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 20:13:30,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-09-11 20:13:30,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:30,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2020-09-11 20:13:30,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417818607] [2020-09-11 20:13:30,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:13:30,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:13:30,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:13:30,497 INFO L87 Difference]: Start difference. First operand 279 states and 554 transitions. Second operand 23 states. [2020-09-11 20:13:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:35,444 INFO L93 Difference]: Finished difference Result 340 states and 676 transitions. [2020-09-11 20:13:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-11 20:13:35,447 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-09-11 20:13:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:35,449 INFO L225 Difference]: With dead ends: 340 [2020-09-11 20:13:35,450 INFO L226 Difference]: Without dead ends: 340 [2020-09-11 20:13:35,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5877 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5005, Invalid=12025, Unknown=0, NotChecked=0, Total=17030 [2020-09-11 20:13:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-11 20:13:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2020-09-11 20:13:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-09-11 20:13:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 652 transitions. [2020-09-11 20:13:35,464 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 652 transitions. Word has length 38 [2020-09-11 20:13:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:35,465 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 652 transitions. [2020-09-11 20:13:35,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:13:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 652 transitions. [2020-09-11 20:13:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-11 20:13:35,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:35,466 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:35,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 20:13:35,681 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1006259789, now seen corresponding path program 12 times [2020-09-11 20:13:35,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:35,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209527180] [2020-09-11 20:13:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-09-11 20:13:35,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209527180] [2020-09-11 20:13:35,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267331072] [2020-09-11 20:13:35,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:36,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-11 20:13:36,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:36,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 20:13:36,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-09-11 20:13:36,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:36,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2020-09-11 20:13:36,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394464580] [2020-09-11 20:13:36,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-11 20:13:36,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:36,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-11 20:13:36,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 20:13:36,293 INFO L87 Difference]: Start difference. First operand 328 states and 652 transitions. Second operand 25 states. [2020-09-11 20:13:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:42,984 INFO L93 Difference]: Finished difference Result 394 states and 784 transitions. [2020-09-11 20:13:42,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2020-09-11 20:13:42,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 41 [2020-09-11 20:13:42,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:42,987 INFO L225 Difference]: With dead ends: 394 [2020-09-11 20:13:42,987 INFO L226 Difference]: Without dead ends: 394 [2020-09-11 20:13:42,993 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 [2020-09-11 20:13:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-09-11 20:13:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 381. [2020-09-11 20:13:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-09-11 20:13:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 758 transitions. [2020-09-11 20:13:43,003 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 758 transitions. Word has length 41 [2020-09-11 20:13:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:43,003 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 758 transitions. [2020-09-11 20:13:43,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-11 20:13:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 758 transitions. [2020-09-11 20:13:43,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-11 20:13:43,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:43,005 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:43,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-11 20:13:43,215 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:43,215 INFO L82 PathProgramCache]: Analyzing trace with hash 519022635, now seen corresponding path program 13 times [2020-09-11 20:13:43,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:43,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882603970] [2020-09-11 20:13:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 20:13:43,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882603970] [2020-09-11 20:13:43,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688230958] [2020-09-11 20:13:43,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 20:13:43,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 20:13:43,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:43,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 20:13:43,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486984240] [2020-09-11 20:13:43,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 20:13:43,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:43,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 20:13:43,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-09-11 20:13:43,613 INFO L87 Difference]: Start difference. First operand 381 states and 758 transitions. Second operand 17 states. [2020-09-11 20:13:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:43,703 INFO L93 Difference]: Finished difference Result 420 states and 836 transitions. [2020-09-11 20:13:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 20:13:43,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-09-11 20:13:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:43,707 INFO L225 Difference]: With dead ends: 420 [2020-09-11 20:13:43,708 INFO L226 Difference]: Without dead ends: 420 [2020-09-11 20:13:43,711 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 [2020-09-11 20:13:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-09-11 20:13:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 407. [2020-09-11 20:13:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-09-11 20:13:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 810 transitions. [2020-09-11 20:13:43,725 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 810 transitions. Word has length 44 [2020-09-11 20:13:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:43,726 INFO L479 AbstractCegarLoop]: Abstraction has 407 states and 810 transitions. [2020-09-11 20:13:43,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 20:13:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 810 transitions. [2020-09-11 20:13:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-11 20:13:43,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:43,729 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:43,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:43,944 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash -942483170, now seen corresponding path program 14 times [2020-09-11 20:13:43,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:43,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740921958] [2020-09-11 20:13:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 20:13:44,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740921958] [2020-09-11 20:13:44,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641283829] [2020-09-11 20:13:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:44,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:13:44,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 20:13:44,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 20:13:44,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:44,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 20:13:44,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703475489] [2020-09-11 20:13:44,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 20:13:44,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:44,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 20:13:44,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:13:44,397 INFO L87 Difference]: Start difference. First operand 407 states and 810 transitions. Second operand 18 states. [2020-09-11 20:13:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:44,509 INFO L93 Difference]: Finished difference Result 446 states and 888 transitions. [2020-09-11 20:13:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 20:13:44,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-09-11 20:13:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:44,512 INFO L225 Difference]: With dead ends: 446 [2020-09-11 20:13:44,512 INFO L226 Difference]: Without dead ends: 446 [2020-09-11 20:13:44,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-09-11 20:13:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-09-11 20:13:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2020-09-11 20:13:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-09-11 20:13:44,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 862 transitions. [2020-09-11 20:13:44,524 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 862 transitions. Word has length 46 [2020-09-11 20:13:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:44,524 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 862 transitions. [2020-09-11 20:13:44,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 20:13:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 862 transitions. [2020-09-11 20:13:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-11 20:13:44,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:44,526 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:44,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 20:13:44,740 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -995255983, now seen corresponding path program 15 times [2020-09-11 20:13:44,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:44,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111591217] [2020-09-11 20:13:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-11 20:13:45,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111591217] [2020-09-11 20:13:45,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319114144] [2020-09-11 20:13:45,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:45,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 20:13:45,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 20:13:45,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-09-11 20:13:45,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:45,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2020-09-11 20:13:45,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485183111] [2020-09-11 20:13:45,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-11 20:13:45,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:45,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-11 20:13:45,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2020-09-11 20:13:45,473 INFO L87 Difference]: Start difference. First operand 433 states and 862 transitions. Second operand 29 states. [2020-09-11 20:13:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:56,510 INFO L93 Difference]: Finished difference Result 508 states and 1012 transitions. [2020-09-11 20:13:56,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-09-11 20:13:56,515 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 48 [2020-09-11 20:13:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:56,518 INFO L225 Difference]: With dead ends: 508 [2020-09-11 20:13:56,519 INFO L226 Difference]: Without dead ends: 508 [2020-09-11 20:13:56,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15565 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=11934, Invalid=29886, Unknown=0, NotChecked=0, Total=41820 [2020-09-11 20:13:56,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2020-09-11 20:13:56,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 494. [2020-09-11 20:13:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-09-11 20:13:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 984 transitions. [2020-09-11 20:13:56,533 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 984 transitions. Word has length 48 [2020-09-11 20:13:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:56,533 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 984 transitions. [2020-09-11 20:13:56,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-11 20:13:56,534 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 984 transitions. [2020-09-11 20:13:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-11 20:13:56,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:56,535 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:56,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 20:13:56,749 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:56,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:56,750 INFO L82 PathProgramCache]: Analyzing trace with hash -954639647, now seen corresponding path program 16 times [2020-09-11 20:13:56,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:56,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432059394] [2020-09-11 20:13:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-11 20:13:57,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432059394] [2020-09-11 20:13:57,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027114657] [2020-09-11 20:13:57,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:57,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 20:13:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 20:13:57,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-11 20:13:57,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:57,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 20:13:57,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997111765] [2020-09-11 20:13:57,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 20:13:57,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 20:13:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-09-11 20:13:57,236 INFO L87 Difference]: Start difference. First operand 494 states and 984 transitions. Second operand 20 states. [2020-09-11 20:13:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:13:57,321 INFO L93 Difference]: Finished difference Result 536 states and 1068 transitions. [2020-09-11 20:13:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 20:13:57,322 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-09-11 20:13:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:13:57,325 INFO L225 Difference]: With dead ends: 536 [2020-09-11 20:13:57,326 INFO L226 Difference]: Without dead ends: 536 [2020-09-11 20:13:57,326 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 [2020-09-11 20:13:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-09-11 20:13:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 522. [2020-09-11 20:13:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-09-11 20:13:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1040 transitions. [2020-09-11 20:13:57,338 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1040 transitions. Word has length 51 [2020-09-11 20:13:57,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:13:57,338 INFO L479 AbstractCegarLoop]: Abstraction has 522 states and 1040 transitions. [2020-09-11 20:13:57,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 20:13:57,338 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1040 transitions. [2020-09-11 20:13:57,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-11 20:13:57,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:13:57,340 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:13:57,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 20:13:57,553 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:13:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:13:57,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1140997490, now seen corresponding path program 17 times [2020-09-11 20:13:57,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:13:57,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295556969] [2020-09-11 20:13:57,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:13:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:13:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-09-11 20:13:57,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295556969] [2020-09-11 20:13:57,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078063465] [2020-09-11 20:13:57,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:13:58,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-09-11 20:13:58,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:13:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 20:13:58,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:13:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-09-11 20:13:58,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:13:58,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2020-09-11 20:13:58,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187617798] [2020-09-11 20:13:58,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-11 20:13:58,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:13:58,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-11 20:13:58,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-09-11 20:13:58,315 INFO L87 Difference]: Start difference. First operand 522 states and 1040 transitions. Second operand 32 states. [2020-09-11 20:14:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:14:14,320 INFO L93 Difference]: Finished difference Result 604 states and 1204 transitions. [2020-09-11 20:14:14,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2020-09-11 20:14:14,321 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 53 [2020-09-11 20:14:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:14:14,324 INFO L225 Difference]: With dead ends: 604 [2020-09-11 20:14:14,324 INFO L226 Difference]: Without dead ends: 604 [2020-09-11 20:14:14,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23424 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=17290, Invalid=43966, Unknown=0, NotChecked=0, Total=61256 [2020-09-11 20:14:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2020-09-11 20:14:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 589. [2020-09-11 20:14:14,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 589 states. [2020-09-11 20:14:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1174 transitions. [2020-09-11 20:14:14,342 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1174 transitions. Word has length 53 [2020-09-11 20:14:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:14:14,342 INFO L479 AbstractCegarLoop]: Abstraction has 589 states and 1174 transitions. [2020-09-11 20:14:14,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-11 20:14:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1174 transitions. [2020-09-11 20:14:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-11 20:14:14,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:14:14,344 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:14:14,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:14:14,558 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:14:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:14:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash 625395594, now seen corresponding path program 18 times [2020-09-11 20:14:14,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:14:14,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779608333] [2020-09-11 20:14:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:14:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:14:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-11 20:14:14,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779608333] [2020-09-11 20:14:14,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014137731] [2020-09-11 20:14:14,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:14:15,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-09-11 20:14:15,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:14:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 20:14:15,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:14:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-09-11 20:14:15,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:14:15,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 34 [2020-09-11 20:14:15,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159624686] [2020-09-11 20:14:15,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-11 20:14:15,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:14:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-11 20:14:15,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 20:14:15,491 INFO L87 Difference]: Start difference. First operand 589 states and 1174 transitions. Second operand 34 states. [2020-09-11 20:14:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:14:36,389 INFO L93 Difference]: Finished difference Result 676 states and 1348 transitions. [2020-09-11 20:14:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 281 states. [2020-09-11 20:14:36,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2020-09-11 20:14:36,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:14:36,393 INFO L225 Difference]: With dead ends: 676 [2020-09-11 20:14:36,394 INFO L226 Difference]: Without dead ends: 676 [2020-09-11 20:14:36,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30615 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=22050, Invalid=56630, Unknown=0, NotChecked=0, Total=78680 [2020-09-11 20:14:36,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2020-09-11 20:14:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2020-09-11 20:14:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 660 states. [2020-09-11 20:14:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1316 transitions. [2020-09-11 20:14:36,411 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1316 transitions. Word has length 56 [2020-09-11 20:14:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:14:36,411 INFO L479 AbstractCegarLoop]: Abstraction has 660 states and 1316 transitions. [2020-09-11 20:14:36,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-11 20:14:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1316 transitions. [2020-09-11 20:14:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-11 20:14:36,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:14:36,413 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:14:36,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:14:36,626 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:14:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:14:36,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1598900536, now seen corresponding path program 19 times [2020-09-11 20:14:36,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:14:36,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523069483] [2020-09-11 20:14:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:14:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:14:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-11 20:14:37,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523069483] [2020-09-11 20:14:37,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142186721] [2020-09-11 20:14:37,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:14:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:14:37,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 20:14:37,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:14:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-09-11 20:14:37,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:14:37,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-11 20:14:37,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102999678] [2020-09-11 20:14:37,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 20:14:37,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:14:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 20:14:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-09-11 20:14:37,224 INFO L87 Difference]: Start difference. First operand 660 states and 1316 transitions. Second operand 23 states. [2020-09-11 20:14:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:14:37,354 INFO L93 Difference]: Finished difference Result 692 states and 1380 transitions. [2020-09-11 20:14:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 20:14:37,355 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2020-09-11 20:14:37,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:14:37,358 INFO L225 Difference]: With dead ends: 692 [2020-09-11 20:14:37,359 INFO L226 Difference]: Without dead ends: 692 [2020-09-11 20:14:37,359 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 [2020-09-11 20:14:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2020-09-11 20:14:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 692. [2020-09-11 20:14:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-09-11 20:14:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1380 transitions. [2020-09-11 20:14:37,375 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1380 transitions. Word has length 59 [2020-09-11 20:14:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:14:37,375 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 1380 transitions. [2020-09-11 20:14:37,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 20:14:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1380 transitions. [2020-09-11 20:14:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-11 20:14:37,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:14:37,378 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:14:37,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 20:14:37,592 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 20:14:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:14:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 746529141, now seen corresponding path program 20 times [2020-09-11 20:14:37,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:14:37,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859329584] [2020-09-11 20:14:37,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:14:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:14:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 20 proven. 91 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-09-11 20:14:37,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859329584] [2020-09-11 20:14:37,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165020553] [2020-09-11 20:14:37,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 20:14:37,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 20:14:37,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 20:14:37,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2020-09-11 20:14:37,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 20:14:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 491 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:14:40,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 20:14:40,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 54] total 70 [2020-09-11 20:14:40,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88849001] [2020-09-11 20:14:40,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-11 20:14:40,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:14:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-11 20:14:40,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=3851, Unknown=0, NotChecked=0, Total=4830 [2020-09-11 20:14:40,586 INFO L87 Difference]: Start difference. First operand 692 states and 1380 transitions. Second operand 70 states. Received shutdown request... [2020-09-11 20:17:03,435 WARN L210 SmtUtils]: Removed 2 from assertion stack [2020-09-11 20:17:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1446 states. [2020-09-11 20:17:03,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 20:17:03,637 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 20:17:03,642 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 20:17:03,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:17:03 BasicIcfg [2020-09-11 20:17:03,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 20:17:03,645 INFO L168 Benchmark]: Toolchain (without parser) took 237808.48 ms. Allocated memory was 140.0 MB in the beginning and 1.1 GB in the end (delta: 977.3 MB). Free memory was 99.3 MB in the beginning and 101.8 MB in the end (delta: -2.6 MB). Peak memory consumption was 974.7 MB. Max. memory is 7.1 GB. [2020-09-11 20:17:03,645 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 20:17:03,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1165.83 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 98.8 MB in the beginning and 106.9 MB in the end (delta: -8.1 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB. [2020-09-11 20:17:03,646 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.98 ms. Allocated memory is still 201.9 MB. Free memory was 106.9 MB in the beginning and 104.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-11 20:17:03,647 INFO L168 Benchmark]: Boogie Preprocessor took 41.01 ms. Allocated memory is still 201.9 MB. Free memory was 104.2 MB in the beginning and 102.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 20:17:03,647 INFO L168 Benchmark]: RCFGBuilder took 603.13 ms. Allocated memory was 201.9 MB in the beginning and 235.9 MB in the end (delta: 34.1 MB). Free memory was 102.1 MB in the beginning and 194.2 MB in the end (delta: -92.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-09-11 20:17:03,648 INFO L168 Benchmark]: TraceAbstraction took 235920.40 ms. Allocated memory was 235.9 MB in the beginning and 1.1 GB in the end (delta: 881.3 MB). Free memory was 194.2 MB in the beginning and 101.8 MB in the end (delta: 92.4 MB). Peak memory consumption was 973.7 MB. Max. memory is 7.1 GB. [2020-09-11 20:17:03,651 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1165.83 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 98.8 MB in the beginning and 106.9 MB in the end (delta: -8.1 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 68.98 ms. Allocated memory is still 201.9 MB. Free memory was 106.9 MB in the beginning and 104.2 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.01 ms. Allocated memory is still 201.9 MB. Free memory was 104.2 MB in the beginning and 102.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 603.13 ms. Allocated memory was 201.9 MB in the beginning and 235.9 MB in the end (delta: 34.1 MB). Free memory was 102.1 MB in the beginning and 194.2 MB in the end (delta: -92.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235920.40 ms. Allocated memory was 235.9 MB in the beginning and 1.1 GB in the end (delta: 881.3 MB). Free memory was 194.2 MB in the beginning and 101.8 MB in the end (delta: 92.4 MB). Peak memory consumption was 973.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 6.2s, 82 ProgramPointsBefore, 15 ProgramPointsAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 640 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 328 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 510 CheckedPairsTotal, 78 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (692states) and FLOYD_HOARE automaton (currently 1446 states, 70 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 10 for 13ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 79 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 235.7s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 212.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.2s, HoareTripleCheckerStatistics: 275 SDtfs, 2992 SDslu, 2428 SDs, 0 SdLazy, 3640 SolverSat, 3967 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4934 GetRequests, 1977 SyntacticMatches, 0 SemanticMatches, 2956 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519947 ImplicationChecksByTransitivity, 188.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=692occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 193 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 9.1s InterpolantComputationTime, 1484 NumberOfCodeBlocks, 1428 NumberOfCodeBlocksAsserted, 124 NumberOfCheckSat, 1441 ConstructedInterpolants, 0 QuantifiedInterpolants, 143605 SizeOfPredicates, 60 NumberOfNonLiveVariables, 4004 ConjunctsInSsa, 256 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 2760/7276 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown