/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 12:06:29,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 12:06:29,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 12:06:29,721 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 12:06:29,721 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 12:06:29,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 12:06:29,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 12:06:29,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 12:06:29,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 12:06:29,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 12:06:29,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 12:06:29,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 12:06:29,746 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 12:06:29,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 12:06:29,752 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 12:06:29,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 12:06:29,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 12:06:29,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 12:06:29,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 12:06:29,769 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 12:06:29,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 12:06:29,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 12:06:29,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 12:06:29,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 12:06:29,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 12:06:29,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 12:06:29,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 12:06:29,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 12:06:29,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 12:06:29,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 12:06:29,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 12:06:29,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 12:06:29,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 12:06:29,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 12:06:29,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 12:06:29,805 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 12:06:29,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 12:06:29,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 12:06:29,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 12:06:29,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 12:06:29,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 12:06:29,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-11 12:06:29,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 12:06:29,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 12:06:29,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 12:06:29,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 12:06:29,860 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 12:06:29,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 12:06:29,861 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 12:06:29,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 12:06:29,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 12:06:29,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 12:06:29,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 12:06:29,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 12:06:29,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 12:06:29,864 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 12:06:29,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 12:06:29,864 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 12:06:29,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 12:06:29,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 12:06:29,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 12:06:29,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 12:06:29,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 12:06:29,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:06:29,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 12:06:29,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 12:06:29,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 12:06:29,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 12:06:29,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 12:06:29,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 12:06:29,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 12:06:29,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 12:06:30,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 12:06:30,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 12:06:30,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 12:06:30,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 12:06:30,355 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 12:06:30,356 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-09-11 12:06:30,453 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5b3774c6/f8d48646737c4e1c8ecf1221665747aa/FLAG271be58a7 [2020-09-11 12:06:31,114 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 12:06:31,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-1.i [2020-09-11 12:06:31,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5b3774c6/f8d48646737c4e1c8ecf1221665747aa/FLAG271be58a7 [2020-09-11 12:06:31,370 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5b3774c6/f8d48646737c4e1c8ecf1221665747aa [2020-09-11 12:06:31,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 12:06:31,390 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 12:06:31,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 12:06:31,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 12:06:31,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 12:06:31,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:06:31" (1/1) ... [2020-09-11 12:06:31,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76cd1aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:31, skipping insertion in model container [2020-09-11 12:06:31,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:06:31" (1/1) ... [2020-09-11 12:06:31,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 12:06:31,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 12:06:32,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:06:32,024 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 12:06:32,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:06:32,160 INFO L208 MainTranslator]: Completed translation [2020-09-11 12:06:32,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32 WrapperNode [2020-09-11 12:06:32,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 12:06:32,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 12:06:32,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 12:06:32,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 12:06:32,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 12:06:32,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 12:06:32,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 12:06:32,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 12:06:32,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (1/1) ... [2020-09-11 12:06:32,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 12:06:32,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 12:06:32,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 12:06:32,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 12:06:32,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (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 12:06:32,364 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 12:06:32,365 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 12:06:32,365 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 12:06:32,365 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 12:06:32,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 12:06:32,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 12:06:32,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 12:06:32,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 12:06:32,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 12:06:32,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 12:06:32,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 12:06:32,370 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 12:06:32,783 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 12:06:32,784 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 12:06:32,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:06:32 BoogieIcfgContainer [2020-09-11 12:06:32,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 12:06:32,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 12:06:32,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 12:06:32,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 12:06:32,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 12:06:31" (1/3) ... [2020-09-11 12:06:32,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b921162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:06:32, skipping insertion in model container [2020-09-11 12:06:32,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:32" (2/3) ... [2020-09-11 12:06:32,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b921162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:06:32, skipping insertion in model container [2020-09-11 12:06:32,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:06:32" (3/3) ... [2020-09-11 12:06:32,799 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-09-11 12:06:32,812 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 12:06:32,812 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 12:06:32,823 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 12:06:32,824 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 12:06:32,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,853 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,854 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,854 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,854 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,854 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,854 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,855 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,855 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,855 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,855 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,857 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,857 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,857 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,858 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,859 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,863 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,864 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,864 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,864 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,864 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,865 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,875 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,876 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,876 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,877 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,877 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,877 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:32,902 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 12:06:32,926 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 12:06:32,926 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 12:06:32,927 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 12:06:32,927 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 12:06:32,927 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 12:06:32,927 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 12:06:32,927 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 12:06:32,928 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 12:06:32,945 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:32,948 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:32,996 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 12:06:32,996 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:06:33,003 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 12:06:33,006 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:33,026 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 12:06:33,026 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:06:33,027 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-11 12:06:33,029 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 12:06:33,031 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 12:06:34,110 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 12:06:34,373 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 12:06:34,374 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 12:06:34,379 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 12:06:34,392 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 12:06:34,395 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 12:06:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 12:06:34,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:34,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 12:06:34,406 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:34,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:34,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 12:06:34,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:34,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327247093] [2020-09-11 12:06:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:34,679 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 12:06:34,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327247093] [2020-09-11 12:06:34,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:34,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 12:06:34,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210527246] [2020-09-11 12:06:34,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 12:06:34,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:34,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 12:06:34,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 12:06:34,713 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 12:06:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:34,794 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 12:06:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:06:34,796 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 12:06:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:34,814 INFO L225 Difference]: With dead ends: 75 [2020-09-11 12:06:34,814 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 12:06:34,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:06:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 12:06:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 12:06:34,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 12:06:34,867 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 12:06:34,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:34,867 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 12:06:34,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 12:06:34,868 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 12:06:34,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:06:34,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:34,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:34,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 12:06:34,869 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 12:06:34,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:34,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953970290] [2020-09-11 12:06:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:35,023 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 12:06:35,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953970290] [2020-09-11 12:06:35,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:35,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:06:35,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985162046] [2020-09-11 12:06:35,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:06:35,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:06:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:06:35,032 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 12:06:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:35,065 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 12:06:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 12:06:35,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:06:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:35,067 INFO L225 Difference]: With dead ends: 56 [2020-09-11 12:06:35,067 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:06:35,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:06:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 12:06:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 12:06:35,077 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 12:06:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:35,078 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 12:06:35,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:06:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 12:06:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:35,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:35,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:35,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 12:06:35,080 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:35,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:35,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 12:06:35,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:35,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768717575] [2020-09-11 12:06:35,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:35,179 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 12:06:35,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768717575] [2020-09-11 12:06:35,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:35,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:35,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685327667] [2020-09-11 12:06:35,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:35,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:35,182 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-11 12:06:35,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:35,270 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 12:06:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:35,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:35,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:35,272 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:35,273 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:35,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-11 12:06:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:35,283 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-11 12:06:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:35,283 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:35,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:35,283 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:35,284 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:35,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:35,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 12:06:35,285 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:35,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-11 12:06:35,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:35,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197534995] [2020-09-11 12:06:35,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:35,409 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 12:06:35,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197534995] [2020-09-11 12:06:35,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:35,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:35,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222543640] [2020-09-11 12:06:35,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:35,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:35,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:35,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:35,412 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-11 12:06:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:35,490 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 12:06:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:06:35,491 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:35,492 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:35,492 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 12:06:35,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:35,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 12:06:35,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 12:06:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 12:06:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-11 12:06:35,498 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-11 12:06:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:35,499 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-11 12:06:35,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-11 12:06:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:35,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:35,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:35,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 12:06:35,500 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-11 12:06:35,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:35,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786701438] [2020-09-11 12:06:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:35,580 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 12:06:35,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786701438] [2020-09-11 12:06:35,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:35,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:35,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961858646] [2020-09-11 12:06:35,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:35,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:35,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:35,583 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-11 12:06:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:35,670 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-11 12:06:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:06:35,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:35,672 INFO L225 Difference]: With dead ends: 57 [2020-09-11 12:06:35,672 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 12:06:35,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 12:06:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-11 12:06:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 12:06:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 12:06:35,679 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-11 12:06:35,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:35,679 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 12:06:35,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:35,679 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 12:06:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:35,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:35,680 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:35,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 12:06:35,681 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-11 12:06:35,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:35,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675838106] [2020-09-11 12:06:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:35,776 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 12:06:35,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675838106] [2020-09-11 12:06:35,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448556783] [2020-09-11 12:06:35,777 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 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 12:06:35,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:35,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:35,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:35,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:35,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:35,933 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 12:06:35,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:35,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:35,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048105993] [2020-09-11 12:06:35,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:35,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:35,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:35,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:35,935 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-11 12:06:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:36,084 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-11 12:06:36,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:36,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:36,086 INFO L225 Difference]: With dead ends: 48 [2020-09-11 12:06:36,086 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 12:06:36,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 12:06:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 12:06:36,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 12:06:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 12:06:36,093 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-11 12:06:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:36,093 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 12:06:36,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 12:06:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:36,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:36,094 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:36,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 12:06:36,296 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:36,297 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-11 12:06:36,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:36,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713627974] [2020-09-11 12:06:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:36,431 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 12:06:36,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713627974] [2020-09-11 12:06:36,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202543402] [2020-09-11 12:06:36,432 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 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 12:06:36,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:36,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:36,509 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 12:06:36,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:36,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 12:06:36,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628949733] [2020-09-11 12:06:36,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 12:06:36,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:36,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 12:06:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:06:36,511 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-11 12:06:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:36,583 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 12:06:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:36,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 12:06:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:36,584 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:36,585 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 12:06:36,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 12:06:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-11 12:06:36,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:36,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 12:06:36,591 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-11 12:06:36,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:36,591 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 12:06:36,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 12:06:36,592 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 12:06:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:36,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:36,593 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:36,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:36,805 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:36,806 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-11 12:06:36,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:36,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213941547] [2020-09-11 12:06:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:36,907 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 12:06:36,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213941547] [2020-09-11 12:06:36,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333552737] [2020-09-11 12:06:36,908 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 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 12:06:36,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:06:36,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:36,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:36,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:36,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:36,993 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 12:06:36,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:36,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:36,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091040201] [2020-09-11 12:06:36,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:36,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:36,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:36,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:36,995 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-11 12:06:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:37,134 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-11 12:06:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:06:37,135 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:37,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:37,136 INFO L225 Difference]: With dead ends: 58 [2020-09-11 12:06:37,136 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 12:06:37,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:37,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 12:06:37,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 12:06:37,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 12:06:37,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 12:06:37,142 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-11 12:06:37,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:37,143 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 12:06:37,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 12:06:37,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:37,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:37,144 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:37,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:37,357 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-11 12:06:37,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:37,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550240193] [2020-09-11 12:06:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:37,453 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 12:06:37,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550240193] [2020-09-11 12:06:37,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517788808] [2020-09-11 12:06:37,454 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 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 12:06:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:37,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:37,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:37,557 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 12:06:37,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:37,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 12:06:37,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006752160] [2020-09-11 12:06:37,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 12:06:37,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:37,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 12:06:37,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:06:37,560 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-11 12:06:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:37,748 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 12:06:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:37,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 12:06:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:37,752 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:37,752 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:06:37,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:06:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-11 12:06:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-11 12:06:37,763 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-11 12:06:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:37,763 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-11 12:06:37,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 12:06:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-11 12:06:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:37,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:37,764 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:37,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:37,977 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:37,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:37,978 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-11 12:06:37,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:37,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555347299] [2020-09-11 12:06:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:38,086 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 12:06:38,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555347299] [2020-09-11 12:06:38,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586738640] [2020-09-11 12:06:38,087 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 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 12:06:38,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:38,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:38,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:38,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:38,181 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 12:06:38,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:38,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:38,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038694825] [2020-09-11 12:06:38,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:38,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:38,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:38,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:38,183 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-11 12:06:38,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:38,383 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-11 12:06:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:38,384 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:38,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:38,385 INFO L225 Difference]: With dead ends: 62 [2020-09-11 12:06:38,385 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:38,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:06:38,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-11 12:06:38,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-11 12:06:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-11 12:06:38,391 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-11 12:06:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:38,391 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-11 12:06:38,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:38,392 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-11 12:06:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:38,393 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:38,393 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:38,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 12:06:38,594 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-11 12:06:38,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:38,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056033599] [2020-09-11 12:06:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:38,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:38,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056033599] [2020-09-11 12:06:38,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102989694] [2020-09-11 12:06:38,684 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 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 12:06:38,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:06:38,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:38,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:38,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:38,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:38,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 12:06:38,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824844323] [2020-09-11 12:06:38,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:38,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:38,774 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-11 12:06:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:38,900 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-11 12:06:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:06:38,900 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 12:06:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:38,902 INFO L225 Difference]: With dead ends: 64 [2020-09-11 12:06:38,902 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 12:06:38,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 12:06:38,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 12:06:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 12:06:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-11 12:06:38,907 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-11 12:06:38,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:38,908 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-11 12:06:38,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-11 12:06:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:38,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:38,909 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:39,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:39,120 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-11 12:06:39,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:39,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415042543] [2020-09-11 12:06:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:39,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415042543] [2020-09-11 12:06:39,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110434585] [2020-09-11 12:06:39,214 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 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 12:06:39,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:39,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:39,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:39,301 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:39,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:39,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:39,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958841224] [2020-09-11 12:06:39,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:39,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:39,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:39,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:39,322 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-11 12:06:39,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:39,519 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-11 12:06:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:39,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:39,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:39,520 INFO L225 Difference]: With dead ends: 61 [2020-09-11 12:06:39,520 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:39,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:06:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-11 12:06:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 12:06:39,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 12:06:39,525 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-11 12:06:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:39,525 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 12:06:39,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 12:06:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:39,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:39,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:39,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:39,738 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-11 12:06:39,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:39,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950800224] [2020-09-11 12:06:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:39,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950800224] [2020-09-11 12:06:39,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733184303] [2020-09-11 12:06:39,817 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 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 12:06:39,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:39,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:39,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:39,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:39,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 12:06:39,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347929635] [2020-09-11 12:06:39,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:39,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:39,888 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-11 12:06:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:40,047 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 12:06:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:40,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 12:06:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:40,049 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:06:40,049 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:40,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:06:40,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-11 12:06:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 12:06:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-11 12:06:40,055 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-11 12:06:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:40,055 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-11 12:06:40,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-11 12:06:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:40,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 12:06:40,269 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-11 12:06:40,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450008840] [2020-09-11 12:06:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:40,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450008840] [2020-09-11 12:06:40,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906542732] [2020-09-11 12:06:40,349 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 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 12:06:40,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:06:40,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:40,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:40,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:40,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:40,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:40,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:40,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924827916] [2020-09-11 12:06:40,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:40,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:40,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:40,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:40,451 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-11 12:06:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:40,699 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-11 12:06:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:40,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:40,700 INFO L225 Difference]: With dead ends: 58 [2020-09-11 12:06:40,700 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:06:40,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:06:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:06:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-11 12:06:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-11 12:06:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-11 12:06:40,704 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-11 12:06:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:40,705 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-11 12:06:40,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-11 12:06:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:40,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:40,918 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-11 12:06:40,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946172294] [2020-09-11 12:06:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:40,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946172294] [2020-09-11 12:06:40,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573768147] [2020-09-11 12:06:40,990 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 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 12:06:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:41,064 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:41,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:41,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367465843] [2020-09-11 12:06:41,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:41,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:41,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:41,077 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-11 12:06:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,321 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-11 12:06:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:41,322 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,323 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:41,323 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:41,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:06:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-11 12:06:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:41,335 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-11 12:06:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,335 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:41,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:41,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,336 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 12:06:41,540 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-11 12:06:41,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777584395] [2020-09-11 12:06:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777584395] [2020-09-11 12:06:41,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232827869] [2020-09-11 12:06:41,628 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 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 12:06:41,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:41,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:41,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:41,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:41,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:41,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848112682] [2020-09-11 12:06:41,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:41,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:41,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:41,772 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-11 12:06:42,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:42,002 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-11 12:06:42,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:42,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:42,005 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:42,005 INFO L226 Difference]: Without dead ends: 49 [2020-09-11 12:06:42,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:06:42,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-11 12:06:42,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-11 12:06:42,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 12:06:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 12:06:42,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-11 12:06:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:42,009 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 12:06:42,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 12:06:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:42,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:42,010 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:42,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 12:06:42,220 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-11 12:06:42,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:42,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217498744] [2020-09-11 12:06:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217498744] [2020-09-11 12:06:42,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051863972] [2020-09-11 12:06:42,336 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 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 12:06:42,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:42,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:42,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:42,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770625997] [2020-09-11 12:06:42,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:42,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:42,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:42,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:42,437 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-11 12:06:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:42,545 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-11 12:06:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:06:42,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:42,546 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:42,546 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:42,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:06:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:42,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 12:06:42,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:42,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 12:06:42,551 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-11 12:06:42,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:42,551 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 12:06:42,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:42,552 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 12:06:42,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:42,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:42,552 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:42,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 12:06:42,763 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-11 12:06:42,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:42,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708192683] [2020-09-11 12:06:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:42,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708192683] [2020-09-11 12:06:42,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467067500] [2020-09-11 12:06:42,855 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 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 12:06:42,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:42,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:42,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:42,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:42,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:42,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135718802] [2020-09-11 12:06:42,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:42,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:42,939 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-11 12:06:43,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:43,135 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-11 12:06:43,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:43,136 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:43,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:43,137 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:06:43,137 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:06:43,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:06:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:06:43,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-11 12:06:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 12:06:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 12:06:43,142 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-11 12:06:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:43,143 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 12:06:43,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:43,143 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 12:06:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:43,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:43,144 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:43,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 12:06:43,355 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:43,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-11 12:06:43,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:43,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155361630] [2020-09-11 12:06:43,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155361630] [2020-09-11 12:06:43,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837176339] [2020-09-11 12:06:43,479 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 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 12:06:43,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:43,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:43,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:43,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:43,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:43,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491042796] [2020-09-11 12:06:43,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:43,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:43,552 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-11 12:06:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:43,724 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-11 12:06:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:43,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:43,726 INFO L225 Difference]: With dead ends: 67 [2020-09-11 12:06:43,726 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:43,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:43,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-11 12:06:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-11 12:06:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-11 12:06:43,730 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-11 12:06:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:43,730 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-11 12:06:43,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-11 12:06:43,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:43,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:43,731 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:43,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:43,942 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:43,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:43,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-11 12:06:43,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:43,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688087584] [2020-09-11 12:06:43,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688087584] [2020-09-11 12:06:44,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296910018] [2020-09-11 12:06:44,025 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 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 12:06:44,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:44,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:44,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:44,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:44,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:44,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:44,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762284777] [2020-09-11 12:06:44,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:44,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:44,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:44,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:44,133 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-11 12:06:44,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:44,359 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-11 12:06:44,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:44,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:44,361 INFO L225 Difference]: With dead ends: 69 [2020-09-11 12:06:44,361 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 12:06:44,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:06:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 12:06:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 12:06:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:44,364 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-11 12:06:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:44,365 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:44,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:44,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:44,366 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:44,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:44,566 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-11 12:06:44,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:44,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579056256] [2020-09-11 12:06:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579056256] [2020-09-11 12:06:44,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783201375] [2020-09-11 12:06:44,648 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 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 12:06:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:44,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:44,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:44,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275544371] [2020-09-11 12:06:44,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:44,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:44,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:44,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:44,714 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-11 12:06:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:44,930 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 12:06:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:44,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:44,932 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:06:44,932 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 12:06:44,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 12:06:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-11 12:06:44,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-11 12:06:44,936 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-11 12:06:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:44,937 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-11 12:06:44,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-11 12:06:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:44,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:44,937 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:45,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:45,138 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:45,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-11 12:06:45,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:45,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90681477] [2020-09-11 12:06:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:45,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90681477] [2020-09-11 12:06:45,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424963263] [2020-09-11 12:06:45,251 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 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 12:06:45,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:45,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:45,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:45,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:45,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:45,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:45,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983158944] [2020-09-11 12:06:45,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:45,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:45,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:45,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:45,353 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-11 12:06:45,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:45,673 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 12:06:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:45,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:45,678 INFO L225 Difference]: With dead ends: 69 [2020-09-11 12:06:45,678 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:45,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:06:45,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-11 12:06:45,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 12:06:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-11 12:06:45,681 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-11 12:06:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:45,682 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-11 12:06:45,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-11 12:06:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:45,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:45,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:45,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 12:06:45,892 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:45,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-11 12:06:45,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:45,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545590091] [2020-09-11 12:06:45,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:45,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545590091] [2020-09-11 12:06:45,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732776033] [2020-09-11 12:06:45,991 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 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 12:06:46,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:46,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:46,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:46,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483744241] [2020-09-11 12:06:46,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:46,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:46,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:46,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:46,074 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-11 12:06:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:46,226 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 12:06:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:46,227 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:46,227 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:06:46,228 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:06:46,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:06:46,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-11 12:06:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:46,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:46,231 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 12:06:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:46,232 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:46,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:46,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:46,233 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:46,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 12:06:46,442 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:46,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:46,443 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-11 12:06:46,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:46,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798231528] [2020-09-11 12:06:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798231528] [2020-09-11 12:06:46,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551918837] [2020-09-11 12:06:46,548 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 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 12:06:46,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:46,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:46,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:46,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:46,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:46,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:46,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817039360] [2020-09-11 12:06:46,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:46,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:46,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:46,646 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 12:06:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:46,874 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-11 12:06:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:46,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:46,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:46,876 INFO L225 Difference]: With dead ends: 71 [2020-09-11 12:06:46,876 INFO L226 Difference]: Without dead ends: 65 [2020-09-11 12:06:46,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-11 12:06:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-11 12:06:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:46,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:46,881 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 12:06:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:46,881 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:46,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:46,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:46,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:47,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 12:06:47,090 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:47,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-11 12:06:47,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:47,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95586014] [2020-09-11 12:06:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95586014] [2020-09-11 12:06:47,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292063879] [2020-09-11 12:06:47,207 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 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 12:06:47,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:47,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:47,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:47,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:47,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420653267] [2020-09-11 12:06:47,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:47,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:47,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:47,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:47,279 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 12:06:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:47,505 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-11 12:06:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:47,506 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:47,507 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:06:47,507 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 12:06:47,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:06:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 12:06:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-11 12:06:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:47,512 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 12:06:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:47,512 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:47,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:47,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:47,513 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:47,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 12:06:47,724 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-11 12:06:47,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:47,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844698808] [2020-09-11 12:06:47,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844698808] [2020-09-11 12:06:47,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768398522] [2020-09-11 12:06:47,808 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 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 12:06:47,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:47,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:47,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:47,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:47,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:47,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3150516] [2020-09-11 12:06:47,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:47,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:47,894 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 12:06:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:48,233 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-11 12:06:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:48,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:48,235 INFO L225 Difference]: With dead ends: 67 [2020-09-11 12:06:48,235 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:48,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:06:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-11 12:06:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:48,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 12:06:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:48,239 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:48,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:48,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:48,239 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:48,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 12:06:48,440 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-11 12:06:48,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:48,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570985707] [2020-09-11 12:06:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:48,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570985707] [2020-09-11 12:06:48,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034395403] [2020-09-11 12:06:48,554 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:48,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:48,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:48,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:48,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:48,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609527578] [2020-09-11 12:06:48,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:48,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:48,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:48,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:48,627 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 12:06:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:48,900 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 12:06:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:48,900 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:48,901 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:06:48,902 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:06:48,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:06:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:06:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-11 12:06:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:06:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-11 12:06:48,905 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-11 12:06:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:48,905 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-11 12:06:48,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-11 12:06:48,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:48,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:48,906 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:49,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:49,107 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-11 12:06:49,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:49,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228348179] [2020-09-11 12:06:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228348179] [2020-09-11 12:06:49,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868914496] [2020-09-11 12:06:49,193 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:49,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:49,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:49,294 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:49,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:49,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807459343] [2020-09-11 12:06:49,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:49,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:49,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:49,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:49,307 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-11 12:06:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:49,686 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-11 12:06:49,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:49,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:49,687 INFO L225 Difference]: With dead ends: 64 [2020-09-11 12:06:49,688 INFO L226 Difference]: Without dead ends: 56 [2020-09-11 12:06:49,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-11 12:06:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-11 12:06:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-11 12:06:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-11 12:06:49,690 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-11 12:06:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:49,691 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-11 12:06:49,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-11 12:06:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:49,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:49,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:49,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 12:06:49,905 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:49,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-11 12:06:49,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:49,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835225745] [2020-09-11 12:06:49,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835225745] [2020-09-11 12:06:49,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575851245] [2020-09-11 12:06:49,992 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:50,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:50,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:50,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:50,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:50,072 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:50,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:50,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461475630] [2020-09-11 12:06:50,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:50,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:50,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:50,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:50,099 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-11 12:06:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:50,468 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-11 12:06:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:50,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:50,470 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:06:50,470 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 12:06:50,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 12:06:50,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-11 12:06:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 12:06:50,473 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-11 12:06:50,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:50,474 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 12:06:50,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:50,474 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 12:06:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:50,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:50,475 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:50,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 12:06:50,682 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:50,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:50,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-11 12:06:50,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:50,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409082280] [2020-09-11 12:06:50,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409082280] [2020-09-11 12:06:50,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385972152] [2020-09-11 12:06:50,795 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:50,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:50,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:50,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:50,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:50,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:50,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:50,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921885894] [2020-09-11 12:06:50,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:50,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:50,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:50,890 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-11 12:06:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:51,279 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-11 12:06:51,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:51,280 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:51,282 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:51,282 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:51,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-11 12:06:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 12:06:51,286 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-11 12:06:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:51,286 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 12:06:51,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 12:06:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:51,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:51,287 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:51,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:51,488 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:51,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-11 12:06:51,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:51,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954284211] [2020-09-11 12:06:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:51,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954284211] [2020-09-11 12:06:51,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5560356] [2020-09-11 12:06:51,602 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:51,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:06:51,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:51,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:51,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:51,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210756023] [2020-09-11 12:06:51,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:51,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:51,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:51,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:51,677 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-11 12:06:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:51,823 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-11 12:06:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:51,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:51,826 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:06:51,827 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:06:51,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:06:51,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:06:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 12:06:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 12:06:51,830 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-11 12:06:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:51,831 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 12:06:51,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 12:06:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:51,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:51,832 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:52,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:52,041 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-11 12:06:52,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:52,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531965429] [2020-09-11 12:06:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531965429] [2020-09-11 12:06:52,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603293142] [2020-09-11 12:06:52,191 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:52,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:06:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:52,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:52,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:52,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:52,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424097986] [2020-09-11 12:06:52,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:52,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:52,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:52,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:52,298 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-11 12:06:52,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:52,548 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-11 12:06:52,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:52,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:52,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:52,550 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:06:52,550 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:06:52,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:52,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:06:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 12:06:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 12:06:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-11 12:06:52,555 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-11 12:06:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:52,555 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-11 12:06:52,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:52,556 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-11 12:06:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:52,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:52,557 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:52,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 12:06:52,768 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-11 12:06:52,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:52,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922619701] [2020-09-11 12:06:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922619701] [2020-09-11 12:06:52,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46159139] [2020-09-11 12:06:52,877 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:52,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:52,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:52,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:52,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429006435] [2020-09-11 12:06:52,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:52,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:52,943 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-11 12:06:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:53,202 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-11 12:06:53,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:53,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:53,204 INFO L225 Difference]: With dead ends: 75 [2020-09-11 12:06:53,204 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 12:06:53,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:06:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 12:06:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-11 12:06:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:53,207 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-11 12:06:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:53,207 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:53,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:53,208 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:53,208 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:53,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:53,417 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-11 12:06:53,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:53,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290916215] [2020-09-11 12:06:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:53,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290916215] [2020-09-11 12:06:53,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81741583] [2020-09-11 12:06:53,524 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:53,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:53,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:53,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:53,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:53,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:53,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:53,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:53,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550735539] [2020-09-11 12:06:53,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:53,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:53,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:53,639 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-11 12:06:53,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:53,914 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-11 12:06:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:53,915 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:53,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:53,915 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:06:53,916 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:06:53,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:06:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:06:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-11 12:06:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:53,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:53,919 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-11 12:06:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:53,919 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:53,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:53,920 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:53,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:53,920 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:54,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 12:06:54,129 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-11 12:06:54,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:54,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522950277] [2020-09-11 12:06:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522950277] [2020-09-11 12:06:54,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787102048] [2020-09-11 12:06:54,266 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:54,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:06:54,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:54,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:54,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:54,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087129432] [2020-09-11 12:06:54,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:54,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:54,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:54,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:54,371 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-11 12:06:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:54,697 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-11 12:06:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:54,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:54,698 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:06:54,698 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:06:54,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:06:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-11 12:06:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 12:06:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-11 12:06:54,702 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-11 12:06:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:54,702 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-11 12:06:54,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-11 12:06:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:54,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:54,703 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:54,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:54,913 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:54,914 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-11 12:06:54,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:54,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300486119] [2020-09-11 12:06:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:55,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300486119] [2020-09-11 12:06:55,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237113871] [2020-09-11 12:06:55,009 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:55,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:55,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:55,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:55,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:55,074 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:55,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:55,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:55,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749470577] [2020-09-11 12:06:55,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:55,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:55,086 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-11 12:06:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:55,472 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-11 12:06:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:55,473 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:55,474 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:06:55,474 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 12:06:55,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 12:06:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-11 12:06:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 12:06:55,477 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-11 12:06:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:55,478 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 12:06:55,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 12:06:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:55,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:55,478 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:55,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 12:06:55,688 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-11 12:06:55,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:55,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756774313] [2020-09-11 12:06:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:55,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756774313] [2020-09-11 12:06:55,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747114416] [2020-09-11 12:06:55,779 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:55,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:06:55,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:55,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:55,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:55,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184010100] [2020-09-11 12:06:55,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:55,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:55,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:55,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:55,869 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-11 12:06:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:56,211 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-11 12:06:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:06:56,212 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:56,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:56,212 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:06:56,213 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:06:56,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:06:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:06:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-11 12:06:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:06:56,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-11 12:06:56,216 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-11 12:06:56,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:56,216 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-11 12:06:56,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:56,217 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-11 12:06:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:56,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:56,217 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:56,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 12:06:56,425 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:56,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:56,426 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-11 12:06:56,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:56,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713493975] [2020-09-11 12:06:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:56,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713493975] [2020-09-11 12:06:56,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097650397] [2020-09-11 12:06:56,527 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:56,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:06:56,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:56,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:56,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:56,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:56,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:56,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:56,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779330408] [2020-09-11 12:06:56,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:56,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:56,616 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-11 12:06:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:57,072 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-11 12:06:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:57,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:57,074 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:06:57,074 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 12:06:57,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:06:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 12:06:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 12:06:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:06:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-11 12:06:57,078 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-11 12:06:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:57,078 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-11 12:06:57,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-11 12:06:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:06:57,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:57,079 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:57,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 12:06:57,288 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-11 12:06:57,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:57,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433879535] [2020-09-11 12:06:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:57,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433879535] [2020-09-11 12:06:57,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926804024] [2020-09-11 12:06:57,408 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:57,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:06:57,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:57,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:57,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:06:57,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354496309] [2020-09-11 12:06:57,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:57,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:57,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:57,480 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-11 12:06:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:57,682 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 12:06:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:57,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:06:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:57,683 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:06:57,683 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:06:57,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:06:57,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:06:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 12:06:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:06:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:06:57,687 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:06:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:57,687 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:06:57,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:06:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:06:57,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:57,688 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:57,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 12:06:57,896 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-11 12:06:57,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:57,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571131958] [2020-09-11 12:06:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571131958] [2020-09-11 12:06:58,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443299759] [2020-09-11 12:06:58,037 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:58,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:58,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:58,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:06:58,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:58,113 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:58,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:06:58,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255208855] [2020-09-11 12:06:58,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:06:58,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:58,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:06:58,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:58,127 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:06:58,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:58,441 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 12:06:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:58,442 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:06:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:58,443 INFO L225 Difference]: With dead ends: 81 [2020-09-11 12:06:58,443 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 12:06:58,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 12:06:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-11 12:06:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:06:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:06:58,447 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:06:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:58,448 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:06:58,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:06:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:06:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:06:58,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:58,448 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:58,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 12:06:58,657 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-11 12:06:58,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:58,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762931490] [2020-09-11 12:06:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762931490] [2020-09-11 12:06:58,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420507126] [2020-09-11 12:06:58,769 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:58,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:06:58,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:06:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:58,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:06:58,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276392561] [2020-09-11 12:06:58,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:58,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:58,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:58,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:58,846 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:06:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:59,150 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 12:06:59,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:59,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:06:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:59,152 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:59,152 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:06:59,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:06:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:06:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-11 12:06:59,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:06:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:06:59,155 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:06:59,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:59,155 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:06:59,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:06:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:06:59,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:59,157 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:59,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 12:06:59,364 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:59,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-11 12:06:59,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:59,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734131472] [2020-09-11 12:06:59,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:59,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734131472] [2020-09-11 12:06:59,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534268641] [2020-09-11 12:06:59,498 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:59,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:59,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:59,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:06:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:59,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:59,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:59,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:59,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:06:59,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315092356] [2020-09-11 12:06:59,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:06:59,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:06:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:59,593 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:06:59,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:59,933 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 12:06:59,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:59,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:06:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:59,934 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:06:59,935 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:59,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:06:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:59,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-11 12:06:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:06:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:06:59,938 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:06:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:59,938 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:06:59,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:06:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:06:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:06:59,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:59,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:00,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 12:07:00,146 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:00,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:00,147 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-11 12:07:00,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:00,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178962594] [2020-09-11 12:07:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:00,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178962594] [2020-09-11 12:07:00,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059207415] [2020-09-11 12:07:00,263 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:00,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:07:00,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:00,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:00,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:00,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:00,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886571015] [2020-09-11 12:07:00,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:00,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:00,342 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:00,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:00,697 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-11 12:07:00,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:00,697 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:00,698 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:07:00,698 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:07:00,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:07:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:07:00,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-11 12:07:00,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:00,703 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:00,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:00,705 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:00,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:00,705 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:00,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:00,706 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:00,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:00,915 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-11 12:07:00,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:00,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165421088] [2020-09-11 12:07:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165421088] [2020-09-11 12:07:01,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022012253] [2020-09-11 12:07:01,039 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:01,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:07:01,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:01,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:01,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:01,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:01,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:01,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231090556] [2020-09-11 12:07:01,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:01,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:01,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:01,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:01,140 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:01,587 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-11 12:07:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:01,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:01,589 INFO L225 Difference]: With dead ends: 73 [2020-09-11 12:07:01,589 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 12:07:01,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 12:07:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-11 12:07:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:01,593 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:01,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:01,593 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:01,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:01,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:01,594 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:01,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 12:07:01,802 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:01,803 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-11 12:07:01,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:01,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102999678] [2020-09-11 12:07:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102999678] [2020-09-11 12:07:01,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855322406] [2020-09-11 12:07:01,903 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:01,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:01,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:01,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322083154] [2020-09-11 12:07:01,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:01,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:01,984 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:02,314 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 12:07:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:02,315 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:02,316 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:02,317 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:02,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:07:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 12:07:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 12:07:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-11 12:07:02,320 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-11 12:07:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:02,320 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-11 12:07:02,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-11 12:07:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:02,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:02,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:02,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:02,525 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-11 12:07:02,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:02,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706430668] [2020-09-11 12:07:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:02,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706430668] [2020-09-11 12:07:02,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554396273] [2020-09-11 12:07:02,629 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:02,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:02,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:02,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:02,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:02,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004833850] [2020-09-11 12:07:02,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:02,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:02,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:02,719 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-11 12:07:03,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:03,113 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-11 12:07:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:03,114 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:03,115 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:07:03,115 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:07:03,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:03,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:07:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-11 12:07:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 12:07:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-11 12:07:03,120 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-11 12:07:03,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:03,120 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-11 12:07:03,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-11 12:07:03,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:03,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:03,121 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:03,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 12:07:03,322 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:03,323 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-11 12:07:03,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:03,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253873504] [2020-09-11 12:07:03,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:03,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253873504] [2020-09-11 12:07:03,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778001857] [2020-09-11 12:07:03,458 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:03,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:07:03,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:03,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:03,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:03,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:03,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:03,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502497840] [2020-09-11 12:07:03,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:03,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:03,582 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-11 12:07:04,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:04,038 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-11 12:07:04,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:04,039 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:04,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:04,040 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:04,040 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:07:04,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:07:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-11 12:07:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 12:07:04,043 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-11 12:07:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:04,044 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 12:07:04,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 12:07:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:04,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:04,044 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:04,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:04,252 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:04,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-11 12:07:04,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:04,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075339682] [2020-09-11 12:07:04,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:04,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075339682] [2020-09-11 12:07:04,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92400144] [2020-09-11 12:07:04,384 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:04,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:04,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:04,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:04,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:04,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:04,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:04,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142794426] [2020-09-11 12:07:04,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:04,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:04,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:04,481 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-11 12:07:04,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:04,937 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-11 12:07:04,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:04,937 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:04,938 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:07:04,939 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:07:04,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:07:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-11 12:07:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:07:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 12:07:04,942 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-11 12:07:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:04,943 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 12:07:04,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 12:07:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:04,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:04,944 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:05,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 12:07:05,146 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:05,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:05,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-11 12:07:05,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:05,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105741944] [2020-09-11 12:07:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:05,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105741944] [2020-09-11 12:07:05,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659793928] [2020-09-11 12:07:05,277 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:05,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:05,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:05,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:05,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:05,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722101452] [2020-09-11 12:07:05,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:05,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:05,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:05,372 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-11 12:07:05,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:05,622 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-11 12:07:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:07:05,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:05,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:05,624 INFO L225 Difference]: With dead ends: 72 [2020-09-11 12:07:05,624 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 12:07:05,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:07:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 12:07:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 12:07:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 12:07:05,628 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-11 12:07:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:05,628 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 12:07:05,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 12:07:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:05,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:05,629 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:05,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 12:07:05,838 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-11 12:07:05,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:05,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953881195] [2020-09-11 12:07:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:06,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953881195] [2020-09-11 12:07:06,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830178941] [2020-09-11 12:07:06,038 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:06,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:06,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:06,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:06,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:06,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:06,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:06,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:06,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93458671] [2020-09-11 12:07:06,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:06,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:06,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:06,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:06,115 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-11 12:07:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:06,384 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-11 12:07:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:07:06,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:06,386 INFO L225 Difference]: With dead ends: 82 [2020-09-11 12:07:06,386 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 12:07:06,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:07:06,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 12:07:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 12:07:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:07:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-11 12:07:06,390 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-11 12:07:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:06,390 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-11 12:07:06,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-11 12:07:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:06,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:06,391 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:06,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 12:07:06,601 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:06,602 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-11 12:07:06,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:06,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068722527] [2020-09-11 12:07:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:06,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068722527] [2020-09-11 12:07:06,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965919298] [2020-09-11 12:07:06,751 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:06,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:06,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:06,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:06,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453445548] [2020-09-11 12:07:06,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:06,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:06,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:06,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:06,841 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-11 12:07:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:07,112 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-11 12:07:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:07,113 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:07,114 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:07:07,114 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:07,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:07:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-11 12:07:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:07:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-11 12:07:07,117 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-11 12:07:07,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:07,117 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-11 12:07:07,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-11 12:07:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:07,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:07,118 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:07,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 12:07:07,328 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:07,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:07,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-11 12:07:07,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:07,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659737690] [2020-09-11 12:07:07,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:07,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659737690] [2020-09-11 12:07:07,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25180299] [2020-09-11 12:07:07,485 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:07,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:07,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:07,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:07,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:07,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:07,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449478719] [2020-09-11 12:07:07,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:07,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:07,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:07,593 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-11 12:07:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:07,958 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-11 12:07:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:07,963 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:07,964 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:07,964 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:07,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:07:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:07,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-11 12:07:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:07,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-11 12:07:07,966 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-11 12:07:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:07,967 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-11 12:07:07,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-11 12:07:07,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:07,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:07,968 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:08,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:08,172 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:08,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:08,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-11 12:07:08,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:08,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954417968] [2020-09-11 12:07:08,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:08,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954417968] [2020-09-11 12:07:08,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114426946] [2020-09-11 12:07:08,289 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:08,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:08,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:08,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:08,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:08,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:08,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:08,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970686076] [2020-09-11 12:07:08,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:08,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:08,382 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-11 12:07:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:08,742 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-11 12:07:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:08,742 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:08,743 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:08,743 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:08,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:08,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:08,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-11 12:07:08,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:08,747 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-11 12:07:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:08,747 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:08,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:08,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:08,748 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:08,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:08,949 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:08,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:08,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-11 12:07:08,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:08,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820444411] [2020-09-11 12:07:08,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:09,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820444411] [2020-09-11 12:07:09,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110842714] [2020-09-11 12:07:09,097 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:09,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:09,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:09,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:09,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:09,161 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:09,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:09,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:09,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714523235] [2020-09-11 12:07:09,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:09,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:09,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:09,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:09,179 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-11 12:07:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:09,642 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-11 12:07:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:09,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:09,643 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:07:09,643 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:07:09,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:07:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:07:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-11 12:07:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:09,646 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-11 12:07:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:09,646 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:09,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:09,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:09,647 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:09,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 12:07:09,847 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:09,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-11 12:07:09,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:09,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451829887] [2020-09-11 12:07:09,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:09,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451829887] [2020-09-11 12:07:09,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614584848] [2020-09-11 12:07:09,985 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:10,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:10,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:10,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:10,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:10,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:10,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876211168] [2020-09-11 12:07:10,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:10,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:10,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:10,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:10,066 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-11 12:07:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:10,470 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-11 12:07:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:10,470 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:10,471 INFO L225 Difference]: With dead ends: 87 [2020-09-11 12:07:10,471 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:07:10,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:10,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:07:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-11 12:07:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 12:07:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-11 12:07:10,474 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-11 12:07:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:10,475 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-11 12:07:10,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-11 12:07:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:10,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:10,475 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:10,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:10,685 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-11 12:07:10,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:10,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600426015] [2020-09-11 12:07:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:10,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600426015] [2020-09-11 12:07:10,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975006547] [2020-09-11 12:07:10,810 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:10,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:10,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:10,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:10,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:10,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:10,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:10,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:10,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247112987] [2020-09-11 12:07:10,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:10,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:10,917 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-11 12:07:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:11,454 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-11 12:07:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:11,455 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:11,456 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:11,456 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:11,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-11 12:07:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:11,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 12:07:11,459 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-11 12:07:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:11,460 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 12:07:11,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:11,460 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 12:07:11,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:11,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:11,461 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:11,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 12:07:11,670 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:11,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-11 12:07:11,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:11,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064319700] [2020-09-11 12:07:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:11,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064319700] [2020-09-11 12:07:11,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131449022] [2020-09-11 12:07:11,790 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:11,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:11,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:11,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:11,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303027115] [2020-09-11 12:07:11,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:11,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:11,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:11,863 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-11 12:07:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:12,327 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 12:07:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:12,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:12,329 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:07:12,330 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:07:12,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:07:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:07:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-11 12:07:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-11 12:07:12,333 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-11 12:07:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:12,333 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-11 12:07:12,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-11 12:07:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:12,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:12,334 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:12,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 12:07:12,542 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-11 12:07:12,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:12,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307828263] [2020-09-11 12:07:12,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:12,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307828263] [2020-09-11 12:07:12,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96974566] [2020-09-11 12:07:12,650 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:12,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:12,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:12,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:12,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:12,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:12,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:12,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572567019] [2020-09-11 12:07:12,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:12,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:12,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:12,754 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-11 12:07:13,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:13,335 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-11 12:07:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:13,336 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:13,337 INFO L225 Difference]: With dead ends: 85 [2020-09-11 12:07:13,337 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:13,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:07:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:13,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-11 12:07:13,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 12:07:13,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-11 12:07:13,341 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-11 12:07:13,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:13,341 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-11 12:07:13,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:13,342 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-11 12:07:13,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:13,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:13,343 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:13,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 12:07:13,553 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:13,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-11 12:07:13,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:13,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618229769] [2020-09-11 12:07:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:13,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618229769] [2020-09-11 12:07:13,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820402699] [2020-09-11 12:07:13,726 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:13,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:13,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:13,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:13,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:13,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:13,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135293139] [2020-09-11 12:07:13,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:13,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:13,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:13,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:13,791 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-11 12:07:14,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:14,066 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 12:07:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:07:14,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:14,068 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:07:14,068 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 12:07:14,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:07:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 12:07:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-11 12:07:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:14,072 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:14,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:14,072 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:14,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:14,072 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:14,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:14,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:14,073 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:14,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 12:07:14,283 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:14,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:14,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-11 12:07:14,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:14,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866101380] [2020-09-11 12:07:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:14,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866101380] [2020-09-11 12:07:14,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927595950] [2020-09-11 12:07:14,447 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:14,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:14,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:14,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:14,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:14,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:14,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:14,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335081191] [2020-09-11 12:07:14,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:14,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:14,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:14,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:14,546 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:14,925 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-11 12:07:14,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:14,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:14,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:14,927 INFO L225 Difference]: With dead ends: 91 [2020-09-11 12:07:14,927 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:07:14,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:14,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:07:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 12:07:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:14,930 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:14,930 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:14,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:14,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:14,931 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:15,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 12:07:15,139 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:15,140 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-11 12:07:15,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:15,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647217373] [2020-09-11 12:07:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:15,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647217373] [2020-09-11 12:07:15,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196434551] [2020-09-11 12:07:15,280 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:15,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:15,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:15,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:15,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:15,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:15,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:15,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511271939] [2020-09-11 12:07:15,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:15,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:15,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:15,356 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:15,712 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 12:07:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:15,713 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:15,714 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:07:15,714 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 12:07:15,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:07:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 12:07:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-11 12:07:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:15,718 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:15,718 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:15,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:15,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:15,719 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:15,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:15,927 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:15,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:15,928 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-11 12:07:15,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:15,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290634316] [2020-09-11 12:07:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:16,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290634316] [2020-09-11 12:07:16,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946084177] [2020-09-11 12:07:16,103 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:16,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:16,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:16,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:16,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:16,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:16,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:16,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909201126] [2020-09-11 12:07:16,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:16,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:16,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:16,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:16,211 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:16,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:16,697 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-11 12:07:16,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:16,698 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:16,699 INFO L225 Difference]: With dead ends: 87 [2020-09-11 12:07:16,699 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:07:16,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:16,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:07:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-11 12:07:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:16,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:16,702 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:16,707 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:16,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:16,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:16,708 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:16,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:16,909 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-11 12:07:16,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:16,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911790475] [2020-09-11 12:07:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:17,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911790475] [2020-09-11 12:07:17,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093428720] [2020-09-11 12:07:17,059 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:17,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:17,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:17,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:17,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514011169] [2020-09-11 12:07:17,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:17,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:17,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:17,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:17,153 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:17,535 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 12:07:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:17,536 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:17,537 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:17,537 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:17,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:07:17,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:17,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-11 12:07:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:17,541 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:17,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:17,541 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:17,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:17,541 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:17,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:17,542 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:17,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-11 12:07:17,743 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-11 12:07:17,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:17,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013720742] [2020-09-11 12:07:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:17,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013720742] [2020-09-11 12:07:17,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537278130] [2020-09-11 12:07:17,896 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:17,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:17,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:17,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:17,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:17,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:17,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:17,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305066412] [2020-09-11 12:07:17,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:17,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:17,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:17,999 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:18,571 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 12:07:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:18,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:18,572 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:07:18,573 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:18,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-11 12:07:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:18,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-11 12:07:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:18,576 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:18,576 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:18,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:18,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:18,577 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:18,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:18,788 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:18,789 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-11 12:07:18,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:18,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367705245] [2020-09-11 12:07:18,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:18,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367705245] [2020-09-11 12:07:18,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710624826] [2020-09-11 12:07:18,940 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:18,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:18,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:18,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:19,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:19,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:19,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:19,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485878195] [2020-09-11 12:07:19,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:19,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:19,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:19,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:19,017 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:19,500 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-11 12:07:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:19,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:19,502 INFO L225 Difference]: With dead ends: 80 [2020-09-11 12:07:19,502 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 12:07:19,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:19,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 12:07:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-11 12:07:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:19,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:19,505 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:19,505 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:19,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:19,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:19,506 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:19,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 12:07:19,707 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-11 12:07:19,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:19,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024837608] [2020-09-11 12:07:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024837608] [2020-09-11 12:07:19,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886227763] [2020-09-11 12:07:19,846 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:19,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:19,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:19,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:19,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:19,931 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:19,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:19,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:19,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142492992] [2020-09-11 12:07:19,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:19,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:19,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:19,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:19,953 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:20,575 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-11 12:07:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:20,576 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:20,577 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:07:20,577 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:07:20,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:07:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:07:20,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-11 12:07:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:20,580 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:20,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:20,581 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:20,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:20,581 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:20,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:20,581 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:20,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:20,782 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-11 12:07:20,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:20,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157167718] [2020-09-11 12:07:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:20,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157167718] [2020-09-11 12:07:20,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389781251] [2020-09-11 12:07:20,918 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:20,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:20,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:20,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:20,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:21,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:21,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:21,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833718011] [2020-09-11 12:07:21,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:21,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:21,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:21,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:21,004 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:21,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:21,543 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 12:07:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:21,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:21,545 INFO L225 Difference]: With dead ends: 95 [2020-09-11 12:07:21,545 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 12:07:21,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:07:21,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 12:07:21,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-11 12:07:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:07:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-11 12:07:21,548 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-11 12:07:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:21,548 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-11 12:07:21,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-11 12:07:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:21,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:21,549 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:21,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 12:07:21,751 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:21,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:21,751 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-11 12:07:21,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:21,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475102213] [2020-09-11 12:07:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:21,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475102213] [2020-09-11 12:07:21,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150402006] [2020-09-11 12:07:21,886 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:21,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:21,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:21,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:21,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:21,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:21,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:21,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:21,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533961453] [2020-09-11 12:07:21,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:21,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:21,992 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-11 12:07:22,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:22,672 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-11 12:07:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:07:22,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:22,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:22,674 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:22,674 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:07:22,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:07:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:07:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-11 12:07:22,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 12:07:22,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-11 12:07:22,676 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-11 12:07:22,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:22,676 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-11 12:07:22,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:22,677 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-11 12:07:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:22,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:22,677 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:22,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:22,878 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:22,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:22,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-11 12:07:22,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:22,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208778388] [2020-09-11 12:07:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:23,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:23,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208778388] [2020-09-11 12:07:23,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806871033] [2020-09-11 12:07:23,023 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:23,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:23,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:23,110 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:23,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:23,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:23,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150828012] [2020-09-11 12:07:23,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:23,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:23,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:23,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:23,128 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-11 12:07:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:23,773 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-11 12:07:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:23,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:23,775 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:23,775 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 12:07:23,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-11 12:07:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 12:07:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-11 12:07:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 12:07:23,778 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-11 12:07:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:23,778 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 12:07:23,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 12:07:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:23,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:23,778 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:23,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 12:07:23,980 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:23,980 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-11 12:07:23,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:23,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983522453] [2020-09-11 12:07:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:24,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983522453] [2020-09-11 12:07:24,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531143850] [2020-09-11 12:07:24,074 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:24,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:24,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:24,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:07:24,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:24,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-11 12:07:24,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-09-11 12:07:24,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55726438] [2020-09-11 12:07:24,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:07:24,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:07:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:07:24,155 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 8 states. [2020-09-11 12:07:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:24,173 INFO L93 Difference]: Finished difference Result 151 states and 338 transitions. [2020-09-11 12:07:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:07:24,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-11 12:07:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:24,174 INFO L225 Difference]: With dead ends: 151 [2020-09-11 12:07:24,174 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:07:24,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:07:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:07:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-09-11 12:07:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:07:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2020-09-11 12:07:24,177 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 19 [2020-09-11 12:07:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:24,177 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2020-09-11 12:07:24,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:07:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2020-09-11 12:07:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:24,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:24,178 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:24,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 12:07:24,379 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:24,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-11 12:07:24,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:24,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094592529] [2020-09-11 12:07:24,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:24,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094592529] [2020-09-11 12:07:24,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954655384] [2020-09-11 12:07:24,449 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:24,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:24,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:24,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:07:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:24,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-11 12:07:24,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2020-09-11 12:07:24,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172365388] [2020-09-11 12:07:24,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:07:24,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:24,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:07:24,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:07:24,515 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand 8 states. [2020-09-11 12:07:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:24,526 INFO L93 Difference]: Finished difference Result 86 states and 150 transitions. [2020-09-11 12:07:24,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:07:24,527 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-09-11 12:07:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:24,528 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:07:24,528 INFO L226 Difference]: Without dead ends: 0 [2020-09-11 12:07:24,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:07:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-11 12:07:24,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-11 12:07:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-11 12:07:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-11 12:07:24,529 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-09-11 12:07:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:24,529 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-11 12:07:24,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:07:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-11 12:07:24,530 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-11 12:07:24,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:24,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 12:07:24 BasicIcfg [2020-09-11 12:07:24,735 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 12:07:24,737 INFO L168 Benchmark]: Toolchain (without parser) took 53350.94 ms. Allocated memory was 140.5 MB in the beginning and 440.9 MB in the end (delta: 300.4 MB). Free memory was 102.7 MB in the beginning and 193.3 MB in the end (delta: -90.7 MB). Peak memory consumption was 209.7 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:24,738 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 12:07:24,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 770.33 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 164.9 MB in the end (delta: -62.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:24,738 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.85 ms. Allocated memory is still 205.0 MB. Free memory was 164.9 MB in the beginning and 162.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:24,739 INFO L168 Benchmark]: Boogie Preprocessor took 36.07 ms. Allocated memory is still 205.0 MB. Free memory was 162.9 MB in the beginning and 161.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:24,739 INFO L168 Benchmark]: RCFGBuilder took 509.31 ms. Allocated memory is still 205.0 MB. Free memory was 161.6 MB in the beginning and 141.1 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:24,739 INFO L168 Benchmark]: TraceAbstraction took 51944.97 ms. Allocated memory was 205.0 MB in the beginning and 440.9 MB in the end (delta: 235.9 MB). Free memory was 141.1 MB in the beginning and 193.3 MB in the end (delta: -52.2 MB). Peak memory consumption was 183.7 MB. Max. memory is 7.1 GB. [2020-09-11 12:07:24,741 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 770.33 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 102.0 MB in the beginning and 164.9 MB in the end (delta: -62.9 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 80.85 ms. Allocated memory is still 205.0 MB. Free memory was 164.9 MB in the beginning and 162.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.07 ms. Allocated memory is still 205.0 MB. Free memory was 162.9 MB in the beginning and 161.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 509.31 ms. Allocated memory is still 205.0 MB. Free memory was 161.6 MB in the beginning and 141.1 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 51944.97 ms. Allocated memory was 205.0 MB in the beginning and 440.9 MB in the end (delta: 235.9 MB). Free memory was 141.1 MB in the beginning and 193.3 MB in the end (delta: -52.2 MB). Peak memory consumption was 183.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 51.8s, OverallIterations: 71, TraceHistogramMax: 6, AutomataDifference: 21.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 1144 SDtfs, 3053 SDslu, 4481 SDs, 0 SdLazy, 4772 SolverSat, 2192 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2330 GetRequests, 841 SyntacticMatches, 64 SemanticMatches, 1425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6870 ImplicationChecksByTransitivity, 20.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=67, 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, 71 MinimizatonAttempts, 1147 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 9.4s InterpolantComputationTime, 2056 NumberOfCodeBlocks, 2056 NumberOfCodeBlocksAsserted, 254 NumberOfCheckSat, 1919 ConstructedInterpolants, 0 QuantifiedInterpolants, 117675 SizeOfPredicates, 456 NumberOfNonLiveVariables, 6614 ConjunctsInSsa, 728 ConjunctsInUnsatCore, 137 InterpolantComputations, 7 PerfectInterpolantSequences, 82/1440 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 proved your program to be correct! Received shutdown request...