/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-14 12:51:10,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-14 12:51:10,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-14 12:51:10,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-14 12:51:10,116 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-14 12:51:10,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-14 12:51:10,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-14 12:51:10,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-14 12:51:10,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-14 12:51:10,139 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-14 12:51:10,140 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-14 12:51:10,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-14 12:51:10,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-14 12:51:10,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-14 12:51:10,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-14 12:51:10,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-14 12:51:10,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-14 12:51:10,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-14 12:51:10,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-14 12:51:10,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-14 12:51:10,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-14 12:51:10,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-14 12:51:10,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-14 12:51:10,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-14 12:51:10,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-14 12:51:10,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-14 12:51:10,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-14 12:51:10,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-14 12:51:10,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-14 12:51:10,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-14 12:51:10,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-14 12:51:10,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-14 12:51:10,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-14 12:51:10,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-14 12:51:10,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-14 12:51:10,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-14 12:51:10,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-14 12:51:10,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-14 12:51:10,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-14 12:51:10,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-14 12:51:10,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-14 12:51:10,197 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 [2020-09-14 12:51:10,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-14 12:51:10,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-14 12:51:10,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-14 12:51:10,251 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-14 12:51:10,251 INFO L138 SettingsManager]: * Use SBE=true [2020-09-14 12:51:10,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-14 12:51:10,251 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-14 12:51:10,252 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-14 12:51:10,252 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-14 12:51:10,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-14 12:51:10,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-14 12:51:10,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-14 12:51:10,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-14 12:51:10,254 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-14 12:51:10,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-14 12:51:10,255 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-14 12:51:10,255 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-14 12:51:10,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-14 12:51:10,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-14 12:51:10,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-14 12:51:10,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-14 12:51:10,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-14 12:51:10,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-14 12:51:10,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-14 12:51:10,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-14 12:51:10,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-14 12:51:10,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-14 12:51:10,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-14 12:51:10,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-14 12:51:10,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-14 12:51:10,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-14 12:51:10,752 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-14 12:51:10,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-14 12:51:10,762 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-14 12:51:10,763 INFO L275 PluginConnector]: CDTParser initialized [2020-09-14 12:51:10,765 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-09-14 12:51:10,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c7784b1f/c1d4e69b435d40329f1b8967ce6ddd0a/FLAG22a7f2ade [2020-09-14 12:51:11,525 INFO L306 CDTParser]: Found 1 translation units. [2020-09-14 12:51:11,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-2.i [2020-09-14 12:51:11,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c7784b1f/c1d4e69b435d40329f1b8967ce6ddd0a/FLAG22a7f2ade [2020-09-14 12:51:11,737 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c7784b1f/c1d4e69b435d40329f1b8967ce6ddd0a [2020-09-14 12:51:11,750 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-14 12:51:11,759 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-14 12:51:11,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-14 12:51:11,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-14 12:51:11,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-14 12:51:11,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:51:11" (1/1) ... [2020-09-14 12:51:11,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41581107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:11, skipping insertion in model container [2020-09-14 12:51:11,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:51:11" (1/1) ... [2020-09-14 12:51:11,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-14 12:51:11,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-14 12:51:12,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:51:12,355 INFO L203 MainTranslator]: Completed pre-run [2020-09-14 12:51:12,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:51:12,507 INFO L208 MainTranslator]: Completed translation [2020-09-14 12:51:12,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12 WrapperNode [2020-09-14 12:51:12,508 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-14 12:51:12,509 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-14 12:51:12,509 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-14 12:51:12,509 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-14 12:51:12,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-14 12:51:12,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-14 12:51:12,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-14 12:51:12,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-14 12:51:12,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,583 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-14 12:51:12,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-14 12:51:12,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-14 12:51:12,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-14 12:51:12,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (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 [2020-09-14 12:51:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-14 12:51:12,689 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-14 12:51:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-14 12:51:12,690 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-14 12:51:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-14 12:51:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-14 12:51:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-14 12:51:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-14 12:51:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-14 12:51:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-14 12:51:12,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-14 12:51:12,694 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-14 12:51:13,057 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-14 12:51:13,058 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-14 12:51:13,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:51:13 BoogieIcfgContainer [2020-09-14 12:51:13,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-14 12:51:13,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-14 12:51:13,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-14 12:51:13,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-14 12:51:13,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 12:51:11" (1/3) ... [2020-09-14 12:51:13,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6f41df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:51:13, skipping insertion in model container [2020-09-14 12:51:13,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12" (2/3) ... [2020-09-14 12:51:13,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6f41df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:51:13, skipping insertion in model container [2020-09-14 12:51:13,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:51:13" (3/3) ... [2020-09-14 12:51:13,071 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-09-14 12:51:13,080 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-14 12:51:13,080 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-14 12:51:13,090 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-14 12:51:13,091 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-14 12:51:13,116 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,116 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,116 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,117 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,117 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,117 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,118 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,118 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,118 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,118 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,119 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,119 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,119 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,119 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,120 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,120 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,120 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,120 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,121 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,121 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,121 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,122 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,122 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,122 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,123 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,123 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,123 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,123 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,128 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,128 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,129 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,129 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,129 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,129 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,142 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,142 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,143 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:13,164 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-14 12:51:13,187 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-14 12:51:13,188 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-14 12:51:13,188 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-14 12:51:13,188 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-14 12:51:13,188 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-14 12:51:13,188 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-14 12:51:13,188 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-14 12:51:13,189 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-14 12:51:13,204 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:13,206 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:13,247 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-14 12:51:13,248 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:51:13,256 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. [2020-09-14 12:51:13,259 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:13,282 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-14 12:51:13,282 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:51:13,283 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. [2020-09-14 12:51:13,285 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-14 12:51:13,287 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-14 12:51:14,374 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-14 12:51:14,634 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-14 12:51:14,634 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-14 12:51:14,639 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-14 12:51:14,652 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-14 12:51:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-14 12:51:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-14 12:51:14,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:14,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-14 12:51:14,665 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:14,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:14,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-14 12:51:14,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:14,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917320048] [2020-09-14 12:51:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:14,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917320048] [2020-09-14 12:51:14,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:14,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-14 12:51:14,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401150625] [2020-09-14 12:51:14,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-14 12:51:14,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:14,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-14 12:51:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-14 12:51:14,989 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-14 12:51:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,069 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-14 12:51:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-14 12:51:15,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-14 12:51:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,087 INFO L225 Difference]: With dead ends: 75 [2020-09-14 12:51:15,087 INFO L226 Difference]: Without dead ends: 42 [2020-09-14 12:51:15,089 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 [2020-09-14 12:51:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-14 12:51:15,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-14 12:51:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-14 12:51:15,140 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-14 12:51:15,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,140 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-14 12:51:15,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-14 12:51:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-14 12:51:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:51:15,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-14 12:51:15,145 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-14 12:51:15,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872312057] [2020-09-14 12:51:15,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872312057] [2020-09-14 12:51:15,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:51:15,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117435695] [2020-09-14 12:51:15,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:51:15,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:51:15,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:51:15,258 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-14 12:51:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,299 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-14 12:51:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-14 12:51:15,300 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:51:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,301 INFO L225 Difference]: With dead ends: 56 [2020-09-14 12:51:15,301 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:51:15,302 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 [2020-09-14 12:51:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:51:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-14 12:51:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-14 12:51:15,311 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-14 12:51:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,312 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-14 12:51:15,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:51:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-14 12:51:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:15,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-14 12:51:15,314 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-14 12:51:15,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129558335] [2020-09-14 12:51:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129558335] [2020-09-14 12:51:15,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:15,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437578261] [2020-09-14 12:51:15,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:15,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:15,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:15,426 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-14 12:51:15,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,527 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-14 12:51:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:15,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,530 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:15,531 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:15,531 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 [2020-09-14 12:51:15,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-14 12:51:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:15,546 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-14 12:51:15,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,548 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:15,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:15,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:15,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-14 12:51:15,551 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-14 12:51:15,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524004077] [2020-09-14 12:51:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524004077] [2020-09-14 12:51:15,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:15,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207691684] [2020-09-14 12:51:15,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:15,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:15,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:15,694 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-14 12:51:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,790 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-14 12:51:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:51:15,791 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,792 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:15,792 INFO L226 Difference]: Without dead ends: 43 [2020-09-14 12:51:15,792 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 [2020-09-14 12:51:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-14 12:51:15,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-14 12:51:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-14 12:51:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-14 12:51:15,798 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-14 12:51:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,798 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-14 12:51:15,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-14 12:51:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:15,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-14 12:51:15,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,800 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-14 12:51:15,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801600110] [2020-09-14 12:51:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:15,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801600110] [2020-09-14 12:51:15,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:15,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:15,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002751293] [2020-09-14 12:51:15,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:15,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:15,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:15,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:15,877 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-14 12:51:15,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:15,985 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-14 12:51:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:51:15,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:15,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:15,987 INFO L225 Difference]: With dead ends: 57 [2020-09-14 12:51:15,988 INFO L226 Difference]: Without dead ends: 51 [2020-09-14 12:51:15,988 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 [2020-09-14 12:51:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-14 12:51:15,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-14 12:51:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-14 12:51:15,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-14 12:51:15,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-14 12:51:15,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:15,998 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-14 12:51:15,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-14 12:51:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:15,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,000 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:16,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-14 12:51:16,000 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:16,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:16,000 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-14 12:51:16,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:16,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437824069] [2020-09-14 12:51:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437824069] [2020-09-14 12:51:16,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498256107] [2020-09-14 12:51:16,081 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 [2020-09-14 12:51:16,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:16,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:16,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:16,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:16,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:16,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356161641] [2020-09-14 12:51:16,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:16,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:16,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:16,241 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-14 12:51:16,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,379 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-14 12:51:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:16,379 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,380 INFO L225 Difference]: With dead ends: 48 [2020-09-14 12:51:16,381 INFO L226 Difference]: Without dead ends: 43 [2020-09-14 12:51:16,381 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 [2020-09-14 12:51:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-14 12:51:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-14 12:51:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-14 12:51:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-14 12:51:16,386 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-14 12:51:16,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,387 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-14 12:51:16,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-14 12:51:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:16,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,388 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:16,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-14 12:51:16,589 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-14 12:51:16,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:16,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286874299] [2020-09-14 12:51:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286874299] [2020-09-14 12:51:16,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231164988] [2020-09-14 12:51:16,685 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 [2020-09-14 12:51:16,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:16,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:16,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-14 12:51:16,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529745876] [2020-09-14 12:51:16,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-14 12:51:16,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-14 12:51:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:51:16,760 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-14 12:51:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,861 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-14 12:51:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:16,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-14 12:51:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,862 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:16,862 INFO L226 Difference]: Without dead ends: 48 [2020-09-14 12:51:16,863 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 [2020-09-14 12:51:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-14 12:51:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-14 12:51:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-14 12:51:16,868 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-14 12:51:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,869 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-14 12:51:16,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-14 12:51:16,869 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-14 12:51:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:16,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,870 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:17,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:17,082 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:17,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:17,083 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-14 12:51:17,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:17,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976638829] [2020-09-14 12:51:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976638829] [2020-09-14 12:51:17,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760985432] [2020-09-14 12:51:17,168 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 [2020-09-14 12:51:17,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:51:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:17,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:17,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:17,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:17,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511682526] [2020-09-14 12:51:17,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:17,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:17,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:17,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:17,273 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-14 12:51:17,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:17,407 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-14 12:51:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:51:17,408 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:17,409 INFO L225 Difference]: With dead ends: 58 [2020-09-14 12:51:17,409 INFO L226 Difference]: Without dead ends: 52 [2020-09-14 12:51:17,409 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 [2020-09-14 12:51:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-14 12:51:17,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-14 12:51:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-14 12:51:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-14 12:51:17,423 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-14 12:51:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:17,423 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-14 12:51:17,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-14 12:51:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:17,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:17,427 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:17,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:17,628 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-14 12:51:17,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:17,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031009300] [2020-09-14 12:51:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031009300] [2020-09-14 12:51:17,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549049515] [2020-09-14 12:51:17,701 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 [2020-09-14 12:51:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:17,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-14 12:51:17,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077447448] [2020-09-14 12:51:17,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-14 12:51:17,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:17,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-14 12:51:17,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:51:17,805 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-14 12:51:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:17,944 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-14 12:51:17,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:17,945 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-14 12:51:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:17,946 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:17,946 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:51:17,946 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 [2020-09-14 12:51:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:51:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-14 12:51:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-14 12:51:17,953 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-14 12:51:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:17,953 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-14 12:51:17,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-14 12:51:17,953 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-14 12:51:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:17,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:17,954 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:18,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:18,168 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:18,169 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-14 12:51:18,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:18,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118111116] [2020-09-14 12:51:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118111116] [2020-09-14 12:51:18,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932455855] [2020-09-14 12:51:18,257 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 [2020-09-14 12:51:18,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:18,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:18,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:18,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:18,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:18,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489215887] [2020-09-14 12:51:18,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:18,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:18,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:18,353 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-14 12:51:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:18,563 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-14 12:51:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:18,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:18,565 INFO L225 Difference]: With dead ends: 62 [2020-09-14 12:51:18,565 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:18,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-14 12:51:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-14 12:51:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-14 12:51:18,578 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-14 12:51:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:18,578 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-14 12:51:18,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-14 12:51:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:18,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:18,580 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:18,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-14 12:51:18,781 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:18,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-14 12:51:18,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:18,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307896169] [2020-09-14 12:51:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307896169] [2020-09-14 12:51:18,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136653208] [2020-09-14 12:51:18,876 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 [2020-09-14 12:51:18,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:51:18,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:18,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:18,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:18,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-14 12:51:18,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517418462] [2020-09-14 12:51:18,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:18,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:18,963 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-14 12:51:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,077 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-14 12:51:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:51:19,078 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-14 12:51:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,079 INFO L225 Difference]: With dead ends: 64 [2020-09-14 12:51:19,079 INFO L226 Difference]: Without dead ends: 58 [2020-09-14 12:51:19,080 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 [2020-09-14 12:51:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-14 12:51:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-14 12:51:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-14 12:51:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-14 12:51:19,084 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-14 12:51:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,084 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-14 12:51:19,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-14 12:51:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:19,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:19,297 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-14 12:51:19,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552157776] [2020-09-14 12:51:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552157776] [2020-09-14 12:51:19,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176441362] [2020-09-14 12:51:19,381 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 [2020-09-14 12:51:19,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:19,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:19,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:19,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:19,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819448429] [2020-09-14 12:51:19,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:19,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:19,471 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-14 12:51:19,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,660 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-14 12:51:19,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:19,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,661 INFO L225 Difference]: With dead ends: 61 [2020-09-14 12:51:19,662 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:19,662 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 [2020-09-14 12:51:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-14 12:51:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-14 12:51:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-14 12:51:19,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-14 12:51:19,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,671 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-14 12:51:19,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:19,672 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-14 12:51:19,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:19,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:19,887 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-14 12:51:19,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125856374] [2020-09-14 12:51:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125856374] [2020-09-14 12:51:19,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204778636] [2020-09-14 12:51:19,956 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 [2020-09-14 12:51:20,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:20,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:20,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-14 12:51:20,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481162396] [2020-09-14 12:51:20,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:20,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:20,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:20,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:20,020 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-14 12:51:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:20,170 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-14 12:51:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:20,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-14 12:51:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:20,172 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:20,172 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:20,175 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 [2020-09-14 12:51:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-14 12:51:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-14 12:51:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-14 12:51:20,179 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-14 12:51:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:20,180 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-14 12:51:20,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-14 12:51:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:20,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:20,181 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:20,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-14 12:51:20,382 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:20,383 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-14 12:51:20,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:20,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371576846] [2020-09-14 12:51:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371576846] [2020-09-14 12:51:20,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914596697] [2020-09-14 12:51:20,455 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 [2020-09-14 12:51:20,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:51:20,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:20,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:20,528 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:20,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:20,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374426399] [2020-09-14 12:51:20,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:20,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:20,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:20,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:20,540 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-14 12:51:20,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:20,785 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-14 12:51:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:20,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:20,787 INFO L225 Difference]: With dead ends: 58 [2020-09-14 12:51:20,787 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:51:20,788 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 [2020-09-14 12:51:20,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:51:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-14 12:51:20,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-14 12:51:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-14 12:51:20,795 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-14 12:51:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:20,795 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-14 12:51:20,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:20,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-14 12:51:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:20,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:20,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:21,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:21,013 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-14 12:51:21,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:21,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927993573] [2020-09-14 12:51:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:21,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927993573] [2020-09-14 12:51:21,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724994379] [2020-09-14 12:51:21,094 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 [2020-09-14 12:51:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:21,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:21,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:21,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:21,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870071373] [2020-09-14 12:51:21,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:21,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:21,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:21,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:21,188 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-14 12:51:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:21,418 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-14 12:51:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:21,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:21,419 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:21,420 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:21,420 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 [2020-09-14 12:51:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:21,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-14 12:51:21,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:21,423 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-14 12:51:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:21,424 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:21,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:21,424 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:21,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:21,425 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:21,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-14 12:51:21,634 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-14 12:51:21,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:21,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514613968] [2020-09-14 12:51:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514613968] [2020-09-14 12:51:21,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540793689] [2020-09-14 12:51:21,720 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 [2020-09-14 12:51:21,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:21,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:21,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:21,803 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:21,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:21,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557267152] [2020-09-14 12:51:21,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:21,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:21,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:21,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:21,824 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-14 12:51:22,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:22,055 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-14 12:51:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:22,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:22,057 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:22,057 INFO L226 Difference]: Without dead ends: 49 [2020-09-14 12:51:22,058 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 [2020-09-14 12:51:22,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-14 12:51:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-14 12:51:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-14 12:51:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-14 12:51:22,062 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-14 12:51:22,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:22,062 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-14 12:51:22,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-14 12:51:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:22,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:22,064 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:22,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-14 12:51:22,265 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:22,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-14 12:51:22,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:22,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588960987] [2020-09-14 12:51:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588960987] [2020-09-14 12:51:22,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452711041] [2020-09-14 12:51:22,359 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 [2020-09-14 12:51:22,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:22,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:22,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:22,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:22,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:22,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491241837] [2020-09-14 12:51:22,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:22,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:22,443 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-14 12:51:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:22,573 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-14 12:51:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:51:22,574 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:22,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:22,574 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:22,575 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:22,575 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 [2020-09-14 12:51:22,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-14 12:51:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-14 12:51:22,579 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-14 12:51:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:22,580 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-14 12:51:22,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-14 12:51:22,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:22,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:22,581 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:22,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-14 12:51:22,791 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:22,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:22,792 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-14 12:51:22,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:22,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815274518] [2020-09-14 12:51:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815274518] [2020-09-14 12:51:22,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955105247] [2020-09-14 12:51:22,878 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 [2020-09-14 12:51:22,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:22,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:22,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:22,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:22,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:22,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:22,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399519030] [2020-09-14 12:51:22,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:22,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:22,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:22,983 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-14 12:51:23,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:23,164 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-14 12:51:23,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:23,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:23,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:23,166 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:23,166 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:23,167 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 [2020-09-14 12:51:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-14 12:51:23,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-14 12:51:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-14 12:51:23,169 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-14 12:51:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:23,170 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-14 12:51:23,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-14 12:51:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:23,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:23,170 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:23,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-14 12:51:23,379 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:23,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:23,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-14 12:51:23,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:23,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785463782] [2020-09-14 12:51:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785463782] [2020-09-14 12:51:23,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919907352] [2020-09-14 12:51:23,467 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 [2020-09-14 12:51:23,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:51:23,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:23,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:23,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:23,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:23,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409696858] [2020-09-14 12:51:23,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:23,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:23,548 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-14 12:51:23,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:23,738 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-14 12:51:23,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:23,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:23,739 INFO L225 Difference]: With dead ends: 67 [2020-09-14 12:51:23,740 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:23,740 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 [2020-09-14 12:51:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-14 12:51:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-14 12:51:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-14 12:51:23,743 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-14 12:51:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:23,744 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-14 12:51:23,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-14 12:51:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:23,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:23,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:23,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:23,954 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-14 12:51:23,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:23,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197765982] [2020-09-14 12:51:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197765982] [2020-09-14 12:51:24,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235780244] [2020-09-14 12:51:24,036 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 [2020-09-14 12:51:24,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:51:24,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:24,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:24,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:24,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:24,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:24,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267141607] [2020-09-14 12:51:24,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:24,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:24,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:24,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:24,130 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-14 12:51:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:24,383 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-14 12:51:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:24,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:24,385 INFO L225 Difference]: With dead ends: 69 [2020-09-14 12:51:24,385 INFO L226 Difference]: Without dead ends: 63 [2020-09-14 12:51:24,386 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 [2020-09-14 12:51:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-14 12:51:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-14 12:51:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:24,389 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-14 12:51:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:24,389 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:24,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:24,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:24,390 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:24,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:24,599 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:24,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-14 12:51:24,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:24,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867841238] [2020-09-14 12:51:24,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867841238] [2020-09-14 12:51:24,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248449701] [2020-09-14 12:51:24,680 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 [2020-09-14 12:51:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:24,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:24,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:24,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519008742] [2020-09-14 12:51:24,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:24,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:24,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:24,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:24,753 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-14 12:51:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:24,987 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-14 12:51:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:24,987 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:24,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:24,988 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:51:24,989 INFO L226 Difference]: Without dead ends: 82 [2020-09-14 12:51:24,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-14 12:51:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-14 12:51:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-14 12:51:24,993 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-14 12:51:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:24,993 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-14 12:51:24,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:24,993 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-14 12:51:24,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:24,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:24,994 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:25,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:25,195 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:25,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:25,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-14 12:51:25,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:25,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740210103] [2020-09-14 12:51:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740210103] [2020-09-14 12:51:25,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877007740] [2020-09-14 12:51:25,271 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 [2020-09-14 12:51:25,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:25,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:25,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:25,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:25,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503279612] [2020-09-14 12:51:25,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:25,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:25,370 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-14 12:51:25,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:25,656 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-14 12:51:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:25,658 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:25,659 INFO L225 Difference]: With dead ends: 69 [2020-09-14 12:51:25,659 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:25,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-14 12:51:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-14 12:51:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-14 12:51:25,662 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-14 12:51:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:25,663 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-14 12:51:25,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-14 12:51:25,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:25,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:25,664 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:25,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-14 12:51:25,876 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-14 12:51:25,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:25,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392686032] [2020-09-14 12:51:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392686032] [2020-09-14 12:51:25,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721391383] [2020-09-14 12:51:25,976 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 [2020-09-14 12:51:26,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:26,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:26,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:26,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:26,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778428975] [2020-09-14 12:51:26,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:26,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:26,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:26,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:26,064 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-14 12:51:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:26,242 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-14 12:51:26,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:26,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:26,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:26,243 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:26,244 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:26,244 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 [2020-09-14 12:51:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-14 12:51:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:26,247 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-14 12:51:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:26,247 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:26,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:26,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:26,249 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:26,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-14 12:51:26,457 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-14 12:51:26,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:26,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772244621] [2020-09-14 12:51:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772244621] [2020-09-14 12:51:26,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838779666] [2020-09-14 12:51:26,583 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 [2020-09-14 12:51:26,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:26,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:26,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:26,665 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:26,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:26,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915721605] [2020-09-14 12:51:26,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:26,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:26,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:26,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:26,679 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-14 12:51:26,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:26,950 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-14 12:51:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:26,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:26,951 INFO L225 Difference]: With dead ends: 71 [2020-09-14 12:51:26,951 INFO L226 Difference]: Without dead ends: 65 [2020-09-14 12:51:26,951 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 [2020-09-14 12:51:26,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-14 12:51:26,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-14 12:51:26,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:26,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:26,955 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-14 12:51:26,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:26,955 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:26,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:26,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:26,956 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:27,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-14 12:51:27,157 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-14 12:51:27,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:27,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411400618] [2020-09-14 12:51:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:27,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411400618] [2020-09-14 12:51:27,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008029607] [2020-09-14 12:51:27,272 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 [2020-09-14 12:51:27,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:51:27,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:27,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:27,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869460525] [2020-09-14 12:51:27,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:27,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:27,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:27,354 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-14 12:51:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:27,577 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-14 12:51:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:27,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:27,579 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:27,579 INFO L226 Difference]: Without dead ends: 62 [2020-09-14 12:51:27,579 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 [2020-09-14 12:51:27,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-14 12:51:27,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-14 12:51:27,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:27,582 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-14 12:51:27,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:27,582 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:27,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:27,582 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:27,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:27,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:27,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:27,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-14 12:51:27,792 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:27,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-14 12:51:27,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:27,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649981953] [2020-09-14 12:51:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649981953] [2020-09-14 12:51:27,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434356532] [2020-09-14 12:51:27,882 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 [2020-09-14 12:51:27,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:51:27,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:27,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:27,960 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:27,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:27,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365813219] [2020-09-14 12:51:27,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:27,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:27,975 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-14 12:51:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:28,242 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-14 12:51:28,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:28,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:28,243 INFO L225 Difference]: With dead ends: 67 [2020-09-14 12:51:28,243 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:28,244 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 [2020-09-14 12:51:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-14 12:51:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:28,246 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-14 12:51:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:28,246 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:28,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:28,247 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:28,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:28,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:28,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-14 12:51:28,455 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:28,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-14 12:51:28,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:28,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710813381] [2020-09-14 12:51:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710813381] [2020-09-14 12:51:28,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933252806] [2020-09-14 12:51:28,544 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 [2020-09-14 12:51:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:28,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:28,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:28,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585334435] [2020-09-14 12:51:28,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:28,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:28,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:28,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:28,615 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-14 12:51:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:28,897 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-14 12:51:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:28,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:28,899 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:28,899 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:28,900 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 [2020-09-14 12:51:28,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:28,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-14 12:51:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-14 12:51:28,903 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-14 12:51:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:28,903 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-14 12:51:28,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-14 12:51:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:28,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:28,904 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:29,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:29,106 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-14 12:51:29,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:29,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310969352] [2020-09-14 12:51:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310969352] [2020-09-14 12:51:29,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222719269] [2020-09-14 12:51:29,195 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 [2020-09-14 12:51:29,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:29,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:29,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:29,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:29,276 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:29,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:29,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2779272] [2020-09-14 12:51:29,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:29,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:29,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:29,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:29,291 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-14 12:51:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:29,646 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-14 12:51:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:29,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:29,647 INFO L225 Difference]: With dead ends: 64 [2020-09-14 12:51:29,647 INFO L226 Difference]: Without dead ends: 56 [2020-09-14 12:51:29,648 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 [2020-09-14 12:51:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-14 12:51:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-14 12:51:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-14 12:51:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-14 12:51:29,651 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-14 12:51:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:29,652 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-14 12:51:29,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-14 12:51:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:29,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:29,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:29,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-14 12:51:29,854 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:29,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-14 12:51:29,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:29,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134778633] [2020-09-14 12:51:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134778633] [2020-09-14 12:51:29,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346680163] [2020-09-14 12:51:29,951 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 [2020-09-14 12:51:30,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:30,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:30,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:30,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:30,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:30,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:30,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683540647] [2020-09-14 12:51:30,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:30,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:30,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:30,047 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-14 12:51:30,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:30,371 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-14 12:51:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:30,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:30,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:30,372 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:30,372 INFO L226 Difference]: Without dead ends: 63 [2020-09-14 12:51:30,373 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 [2020-09-14 12:51:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-14 12:51:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-14 12:51:30,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-14 12:51:30,377 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-14 12:51:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:30,377 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-14 12:51:30,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-14 12:51:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:30,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:30,378 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:30,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-14 12:51:30,585 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-14 12:51:30,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:30,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23669792] [2020-09-14 12:51:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23669792] [2020-09-14 12:51:30,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723661305] [2020-09-14 12:51:30,684 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 [2020-09-14 12:51:30,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:30,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:30,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:30,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:30,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:30,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:30,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387945055] [2020-09-14 12:51:30,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:30,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:30,782 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-14 12:51:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:31,195 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-14 12:51:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:31,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:31,197 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:31,197 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:31,198 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 [2020-09-14 12:51:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:31,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-14 12:51:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-14 12:51:31,203 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-14 12:51:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:31,203 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-14 12:51:31,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-14 12:51:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:31,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:31,204 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:31,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:31,405 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:31,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:31,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-14 12:51:31,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:31,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611250063] [2020-09-14 12:51:31,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:31,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611250063] [2020-09-14 12:51:31,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950358348] [2020-09-14 12:51:31,525 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 [2020-09-14 12:51:31,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:31,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:31,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:31,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:31,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:31,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289717627] [2020-09-14 12:51:31,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:31,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:31,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:31,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:31,593 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-14 12:51:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:31,749 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-14 12:51:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:31,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:31,752 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:31,752 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:31,753 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 [2020-09-14 12:51:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-14 12:51:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-14 12:51:31,756 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-14 12:51:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:31,756 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-14 12:51:31,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-14 12:51:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:31,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:31,757 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:31,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:31,968 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:31,969 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-14 12:51:31,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:31,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139445180] [2020-09-14 12:51:31,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139445180] [2020-09-14 12:51:32,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829594809] [2020-09-14 12:51:32,108 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 [2020-09-14 12:51:32,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:32,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:32,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:32,197 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:32,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:32,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38056168] [2020-09-14 12:51:32,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:32,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:32,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:32,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:32,215 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-14 12:51:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:32,429 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-14 12:51:32,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:32,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:32,430 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:32,430 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:32,431 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 [2020-09-14 12:51:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-14 12:51:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-14 12:51:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-14 12:51:32,433 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-14 12:51:32,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:32,434 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-14 12:51:32,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-14 12:51:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:32,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:32,434 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:32,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-14 12:51:32,635 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-14 12:51:32,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:32,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176849299] [2020-09-14 12:51:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176849299] [2020-09-14 12:51:32,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177346668] [2020-09-14 12:51:32,739 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 [2020-09-14 12:51:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:32,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:32,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:32,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:32,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301839723] [2020-09-14 12:51:32,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:32,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:32,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:32,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:32,813 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-14 12:51:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:33,045 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-14 12:51:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:33,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:33,046 INFO L225 Difference]: With dead ends: 75 [2020-09-14 12:51:33,046 INFO L226 Difference]: Without dead ends: 69 [2020-09-14 12:51:33,047 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 [2020-09-14 12:51:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-14 12:51:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-14 12:51:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:33,051 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-14 12:51:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:33,051 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:33,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:33,051 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:33,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:33,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:33,052 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:33,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:33,253 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:33,254 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-14 12:51:33,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:33,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408639204] [2020-09-14 12:51:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:33,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408639204] [2020-09-14 12:51:33,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570525120] [2020-09-14 12:51:33,372 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 [2020-09-14 12:51:33,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:33,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:33,454 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:33,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:33,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:33,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122586952] [2020-09-14 12:51:33,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:33,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:33,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:33,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:33,474 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-14 12:51:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:33,785 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-14 12:51:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:33,786 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:33,787 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:51:33,787 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:51:33,788 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 [2020-09-14 12:51:33,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:51:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-14 12:51:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:33,792 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-14 12:51:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:33,792 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:33,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:33,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:33,793 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:33,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-14 12:51:33,994 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:33,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:33,995 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-14 12:51:33,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:33,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151583126] [2020-09-14 12:51:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151583126] [2020-09-14 12:51:34,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295719565] [2020-09-14 12:51:34,100 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 [2020-09-14 12:51:34,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:34,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:34,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:34,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:34,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:34,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754490541] [2020-09-14 12:51:34,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:34,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:34,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:34,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:34,171 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-14 12:51:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:34,458 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-14 12:51:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:34,459 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:34,460 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:51:34,460 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:51:34,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:51:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-14 12:51:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-14 12:51:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-14 12:51:34,463 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-14 12:51:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:34,464 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-14 12:51:34,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-14 12:51:34,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:34,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:34,464 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:34,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:34,665 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:34,666 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-14 12:51:34,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:34,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448625816] [2020-09-14 12:51:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448625816] [2020-09-14 12:51:34,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576054371] [2020-09-14 12:51:34,768 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 [2020-09-14 12:51:34,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:34,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:34,847 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:34,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:34,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515532909] [2020-09-14 12:51:34,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:34,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:34,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:34,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:34,860 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-14 12:51:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:35,221 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-14 12:51:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:35,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:35,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:35,223 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:51:35,223 INFO L226 Difference]: Without dead ends: 70 [2020-09-14 12:51:35,223 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 [2020-09-14 12:51:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-14 12:51:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-14 12:51:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-14 12:51:35,226 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-14 12:51:35,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:35,227 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-14 12:51:35,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-14 12:51:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:35,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:35,228 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:35,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-14 12:51:35,439 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:35,439 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-14 12:51:35,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:35,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240419475] [2020-09-14 12:51:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240419475] [2020-09-14 12:51:35,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246912894] [2020-09-14 12:51:35,555 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 [2020-09-14 12:51:35,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:35,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:35,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:35,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:35,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:35,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096854846] [2020-09-14 12:51:35,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:35,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:35,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:35,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:35,643 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-14 12:51:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:35,984 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-14 12:51:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:35,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:35,985 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:51:35,985 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:51:35,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:51:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:51:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-14 12:51:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-14 12:51:35,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-14 12:51:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:35,989 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-14 12:51:35,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-14 12:51:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:35,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:35,990 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:36,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-14 12:51:36,198 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:36,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:36,199 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-14 12:51:36,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:36,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890219032] [2020-09-14 12:51:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:36,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890219032] [2020-09-14 12:51:36,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842664947] [2020-09-14 12:51:36,299 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 [2020-09-14 12:51:36,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:36,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:36,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:36,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:36,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:36,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:36,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:36,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628933957] [2020-09-14 12:51:36,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:36,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:36,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:36,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:36,396 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-14 12:51:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:36,832 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-14 12:51:36,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:36,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:36,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:36,833 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:36,834 INFO L226 Difference]: Without dead ends: 69 [2020-09-14 12:51:36,834 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 [2020-09-14 12:51:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-14 12:51:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-14 12:51:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:51:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-14 12:51:36,838 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-14 12:51:36,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:36,838 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-14 12:51:36,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:36,838 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-14 12:51:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:36,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:36,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:37,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-14 12:51:37,049 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:37,050 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-14 12:51:37,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:37,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200552011] [2020-09-14 12:51:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200552011] [2020-09-14 12:51:37,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663874568] [2020-09-14 12:51:37,171 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 [2020-09-14 12:51:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:37,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:37,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:37,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684564914] [2020-09-14 12:51:37,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:37,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:37,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:37,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:37,237 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-14 12:51:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:37,458 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-14 12:51:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:37,458 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:37,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:37,459 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:37,459 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:37,460 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 [2020-09-14 12:51:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-14 12:51:37,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:37,463 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:37,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:37,463 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:37,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:37,464 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:37,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:37,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:37,464 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:37,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-14 12:51:37,673 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:37,674 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-14 12:51:37,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:37,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415982574] [2020-09-14 12:51:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415982574] [2020-09-14 12:51:37,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653629014] [2020-09-14 12:51:37,836 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 [2020-09-14 12:51:37,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:37,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:37,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:37,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:37,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176403546] [2020-09-14 12:51:37,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:37,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:37,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:37,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:37,932 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:38,255 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-14 12:51:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:38,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:38,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:38,256 INFO L225 Difference]: With dead ends: 81 [2020-09-14 12:51:38,256 INFO L226 Difference]: Without dead ends: 75 [2020-09-14 12:51:38,257 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 [2020-09-14 12:51:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-14 12:51:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-14 12:51:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:38,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:38,260 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:38,261 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:38,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:38,261 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:38,261 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:38,261 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:38,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-14 12:51:38,471 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:38,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-14 12:51:38,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:38,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250171283] [2020-09-14 12:51:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250171283] [2020-09-14 12:51:38,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205000797] [2020-09-14 12:51:38,608 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 [2020-09-14 12:51:38,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:38,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:38,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:38,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086169654] [2020-09-14 12:51:38,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:38,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:38,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:38,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:38,682 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:38,949 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-14 12:51:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:38,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:38,950 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:38,950 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:51:38,951 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 [2020-09-14 12:51:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:51:38,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-14 12:51:38,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:38,953 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:38,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:38,953 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:38,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:38,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:38,954 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:39,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-14 12:51:39,155 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-14 12:51:39,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:39,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199378856] [2020-09-14 12:51:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:39,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199378856] [2020-09-14 12:51:39,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842198027] [2020-09-14 12:51:39,284 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 [2020-09-14 12:51:39,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:39,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:39,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:39,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:39,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:39,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:39,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:39,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107115405] [2020-09-14 12:51:39,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:39,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:39,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:39,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:39,378 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:39,776 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-14 12:51:39,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:39,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:39,777 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:39,777 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:39,778 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 [2020-09-14 12:51:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-14 12:51:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:39,780 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:39,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:39,780 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:39,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:39,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:39,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:39,781 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:39,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-14 12:51:39,988 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:39,988 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-14 12:51:39,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:39,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539743622] [2020-09-14 12:51:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539743622] [2020-09-14 12:51:40,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996992761] [2020-09-14 12:51:40,114 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 [2020-09-14 12:51:40,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:40,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:40,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:40,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:40,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626630321] [2020-09-14 12:51:40,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:40,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:40,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:40,215 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:40,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:40,544 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-14 12:51:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:40,545 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:40,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:40,546 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:40,546 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:40,547 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 [2020-09-14 12:51:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-14 12:51:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:40,550 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:40,550 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:40,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:40,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:40,551 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:40,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:40,759 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:40,760 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-14 12:51:40,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:40,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507700093] [2020-09-14 12:51:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507700093] [2020-09-14 12:51:40,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265132666] [2020-09-14 12:51:40,866 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 [2020-09-14 12:51:40,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:40,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:40,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:40,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:40,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691650936] [2020-09-14 12:51:40,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:40,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:40,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:40,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:40,959 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:41,406 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-14 12:51:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:41,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:41,408 INFO L225 Difference]: With dead ends: 73 [2020-09-14 12:51:41,408 INFO L226 Difference]: Without dead ends: 67 [2020-09-14 12:51:41,408 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 [2020-09-14 12:51:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-14 12:51:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-14 12:51:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:41,411 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:41,411 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:41,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:41,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:41,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:41,413 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:41,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-14 12:51:41,615 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:41,616 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-14 12:51:41,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:41,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535908291] [2020-09-14 12:51:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535908291] [2020-09-14 12:51:41,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618525997] [2020-09-14 12:51:41,725 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 [2020-09-14 12:51:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:41,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:41,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:41,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743104505] [2020-09-14 12:51:41,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:41,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:41,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:41,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:41,798 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:42,182 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-14 12:51:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:42,182 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:42,183 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:42,184 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:42,184 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 [2020-09-14 12:51:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-14 12:51:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-14 12:51:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-14 12:51:42,188 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-14 12:51:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:42,189 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-14 12:51:42,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:42,189 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-14 12:51:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:42,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:42,189 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:42,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:42,400 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-14 12:51:42,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:42,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778786479] [2020-09-14 12:51:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:42,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778786479] [2020-09-14 12:51:42,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422474533] [2020-09-14 12:51:42,543 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 [2020-09-14 12:51:42,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:42,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:42,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:42,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:42,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218195399] [2020-09-14 12:51:42,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:42,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:42,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:42,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:42,646 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-14 12:51:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:43,111 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-14 12:51:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:43,112 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:43,112 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:43,112 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:43,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-14 12:51:43,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-14 12:51:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-14 12:51:43,115 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-14 12:51:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:43,117 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-14 12:51:43,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-14 12:51:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:43,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:43,118 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:43,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-14 12:51:43,319 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-14 12:51:43,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:43,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813251610] [2020-09-14 12:51:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813251610] [2020-09-14 12:51:43,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559902570] [2020-09-14 12:51:43,418 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 [2020-09-14 12:51:43,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:43,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:43,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:43,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:43,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:43,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:43,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525961023] [2020-09-14 12:51:43,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:43,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:43,519 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-14 12:51:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:44,005 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-14 12:51:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:44,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:44,006 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:51:44,006 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:44,007 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 [2020-09-14 12:51:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-14 12:51:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-14 12:51:44,009 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-14 12:51:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:44,009 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-14 12:51:44,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-14 12:51:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:44,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:44,010 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:44,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:44,217 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-14 12:51:44,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:44,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087169080] [2020-09-14 12:51:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087169080] [2020-09-14 12:51:44,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463512430] [2020-09-14 12:51:44,343 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 [2020-09-14 12:51:44,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:44,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:44,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:44,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:44,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:44,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115733820] [2020-09-14 12:51:44,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:44,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:44,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:44,438 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-14 12:51:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:44,981 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-14 12:51:44,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:44,981 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:44,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:44,982 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:44,982 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:44,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-14 12:51:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-14 12:51:44,986 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-14 12:51:44,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:44,986 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-14 12:51:44,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-14 12:51:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:44,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:44,987 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:45,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-14 12:51:45,197 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:45,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-14 12:51:45,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:45,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890237451] [2020-09-14 12:51:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890237451] [2020-09-14 12:51:45,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384230211] [2020-09-14 12:51:45,338 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 [2020-09-14 12:51:45,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:45,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:45,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:45,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253727353] [2020-09-14 12:51:45,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:45,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:45,447 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-14 12:51:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:45,696 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-14 12:51:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:45,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:45,698 INFO L225 Difference]: With dead ends: 72 [2020-09-14 12:51:45,698 INFO L226 Difference]: Without dead ends: 66 [2020-09-14 12:51:45,699 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 [2020-09-14 12:51:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-14 12:51:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-14 12:51:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-14 12:51:45,703 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-14 12:51:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:45,704 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-14 12:51:45,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-14 12:51:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:45,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:45,707 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:45,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-14 12:51:45,911 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:45,912 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-14 12:51:45,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:45,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113632213] [2020-09-14 12:51:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113632213] [2020-09-14 12:51:46,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191680906] [2020-09-14 12:51:46,103 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 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 [2020-09-14 12:51:46,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:46,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:46,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:46,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:46,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:46,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178307948] [2020-09-14 12:51:46,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:46,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:46,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:46,222 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-14 12:51:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:46,501 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-14 12:51:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:46,502 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:46,503 INFO L225 Difference]: With dead ends: 82 [2020-09-14 12:51:46,503 INFO L226 Difference]: Without dead ends: 76 [2020-09-14 12:51:46,503 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 [2020-09-14 12:51:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-14 12:51:46,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-14 12:51:46,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-14 12:51:46,506 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-14 12:51:46,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:46,506 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-14 12:51:46,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:46,507 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-14 12:51:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:46,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:46,507 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:46,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-14 12:51:46,715 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:46,716 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-14 12:51:46,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:46,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330320310] [2020-09-14 12:51:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330320310] [2020-09-14 12:51:46,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441546528] [2020-09-14 12:51:46,878 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 [2020-09-14 12:51:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:46,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:46,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:46,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150758613] [2020-09-14 12:51:46,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:46,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:46,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:46,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:46,960 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-14 12:51:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:47,286 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-14 12:51:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:47,286 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:47,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:47,288 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:47,288 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:47,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:47,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-14 12:51:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:51:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-14 12:51:47,291 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-14 12:51:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:47,292 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-14 12:51:47,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-14 12:51:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:47,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:47,293 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:47,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-14 12:51:47,501 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:47,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-14 12:51:47,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:47,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928924925] [2020-09-14 12:51:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:47,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928924925] [2020-09-14 12:51:47,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860103828] [2020-09-14 12:51:47,652 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 [2020-09-14 12:51:47,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:47,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:47,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:47,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:47,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:47,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:47,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673279151] [2020-09-14 12:51:47,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:47,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:47,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:47,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:47,736 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-14 12:51:48,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:48,109 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-14 12:51:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:48,113 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:48,114 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:48,114 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:48,114 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 [2020-09-14 12:51:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-14 12:51:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-14 12:51:48,116 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-14 12:51:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:48,117 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-14 12:51:48,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-14 12:51:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:48,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:48,118 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:48,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:48,319 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:48,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:48,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-14 12:51:48,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:48,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101013777] [2020-09-14 12:51:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101013777] [2020-09-14 12:51:48,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171515325] [2020-09-14 12:51:48,443 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 [2020-09-14 12:51:48,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:51:48,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:48,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:48,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:48,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:48,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337915738] [2020-09-14 12:51:48,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:48,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:48,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:48,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:48,516 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-14 12:51:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:48,894 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-14 12:51:48,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:48,894 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:48,896 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:48,896 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:48,896 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 [2020-09-14 12:51:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:48,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-14 12:51:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:48,900 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-14 12:51:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:48,900 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:48,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:48,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:48,906 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:49,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:49,116 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:49,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-14 12:51:49,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:49,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884697206] [2020-09-14 12:51:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884697206] [2020-09-14 12:51:49,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620909032] [2020-09-14 12:51:49,257 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 [2020-09-14 12:51:49,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:49,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:49,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:49,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:49,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:49,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437069606] [2020-09-14 12:51:49,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:49,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:49,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:49,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:49,364 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-14 12:51:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:49,846 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-14 12:51:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:49,847 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:49,848 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:51:49,848 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:51:49,848 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 [2020-09-14 12:51:49,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:51:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-14 12:51:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:49,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:49,851 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-14 12:51:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:49,851 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:49,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:49,852 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:49,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:49,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:49,852 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:50,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-14 12:51:50,062 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:50,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:50,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-14 12:51:50,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:50,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39953653] [2020-09-14 12:51:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39953653] [2020-09-14 12:51:50,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252190721] [2020-09-14 12:51:50,200 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 [2020-09-14 12:51:50,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:50,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:50,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:50,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:50,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:50,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086753580] [2020-09-14 12:51:50,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:50,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:50,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:50,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:50,276 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-14 12:51:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:50,716 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-14 12:51:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:51:50,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:50,718 INFO L225 Difference]: With dead ends: 87 [2020-09-14 12:51:50,718 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:51:50,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:51:50,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-14 12:51:50,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-14 12:51:50,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-14 12:51:50,721 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-14 12:51:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:50,721 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-14 12:51:50,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-14 12:51:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:50,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:50,722 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:50,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:50,931 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:50,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-14 12:51:50,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:50,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080616419] [2020-09-14 12:51:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:51,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080616419] [2020-09-14 12:51:51,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560172465] [2020-09-14 12:51:51,059 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 [2020-09-14 12:51:51,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:51,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:51,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:51,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:51,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:51,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:51,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:51,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219650080] [2020-09-14 12:51:51,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:51,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:51,159 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-14 12:51:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:51,716 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-14 12:51:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:51:51,717 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:51,718 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:51,718 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:51,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:51,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-14 12:51:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-14 12:51:51,722 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-14 12:51:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:51,722 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-14 12:51:51,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-14 12:51:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:51,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:51,723 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:51,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-14 12:51:51,931 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:51,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-14 12:51:51,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:51,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240377078] [2020-09-14 12:51:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:51,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240377078] [2020-09-14 12:51:52,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331733230] [2020-09-14 12:51:52,050 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 [2020-09-14 12:51:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:52,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:52,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:52,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737665756] [2020-09-14 12:51:52,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:52,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:52,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:52,130 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-14 12:51:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:52,587 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-14 12:51:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:51:52,588 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:52,588 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:51:52,589 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:51:52,589 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 [2020-09-14 12:51:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:51:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-14 12:51:52,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:51:52,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-14 12:51:52,591 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-14 12:51:52,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:52,592 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-14 12:51:52,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:52,592 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-14 12:51:52,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:52,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:52,593 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:52,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-14 12:51:52,796 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-14 12:51:52,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:52,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096359938] [2020-09-14 12:51:52,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096359938] [2020-09-14 12:51:52,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549428407] [2020-09-14 12:51:52,912 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 [2020-09-14 12:51:52,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:52,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:52,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:53,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:53,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:53,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938679427] [2020-09-14 12:51:53,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:53,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:53,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:53,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:53,010 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-14 12:51:53,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:53,609 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-14 12:51:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:51:53,609 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:53,610 INFO L225 Difference]: With dead ends: 85 [2020-09-14 12:51:53,611 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:53,611 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 [2020-09-14 12:51:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:53,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-14 12:51:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-14 12:51:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-14 12:51:53,613 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-14 12:51:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:53,614 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-14 12:51:53,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-14 12:51:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:53,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:53,615 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:53,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-14 12:51:53,821 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:53,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-14 12:51:53,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:53,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730088906] [2020-09-14 12:51:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-14 12:51:53,834 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-14 12:51:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-14 12:51:53,856 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-14 12:51:53,889 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-14 12:51:53,889 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-14 12:51:53,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-14 12:51:53,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 12:51:53 BasicIcfg [2020-09-14 12:51:53,967 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-14 12:51:53,969 INFO L168 Benchmark]: Toolchain (without parser) took 42217.49 ms. Allocated memory was 140.5 MB in the beginning and 407.4 MB in the end (delta: 266.9 MB). Free memory was 102.6 MB in the beginning and 237.1 MB in the end (delta: -134.5 MB). Peak memory consumption was 132.3 MB. Max. memory is 7.1 GB. [2020-09-14 12:51:53,970 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-14 12:51:53,970 INFO L168 Benchmark]: CACSL2BoogieTranslator took 745.47 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 164.5 MB in the end (delta: -62.6 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-09-14 12:51:53,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.85 ms. Allocated memory is still 204.5 MB. Free memory was 164.5 MB in the beginning and 162.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-14 12:51:53,971 INFO L168 Benchmark]: Boogie Preprocessor took 34.07 ms. Allocated memory is still 204.5 MB. Free memory was 162.6 MB in the beginning and 161.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-14 12:51:53,971 INFO L168 Benchmark]: RCFGBuilder took 460.84 ms. Allocated memory is still 204.5 MB. Free memory was 161.3 MB in the beginning and 140.8 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-09-14 12:51:53,972 INFO L168 Benchmark]: TraceAbstraction took 40903.64 ms. Allocated memory was 204.5 MB in the beginning and 407.4 MB in the end (delta: 202.9 MB). Free memory was 140.1 MB in the beginning and 237.1 MB in the end (delta: -97.0 MB). Peak memory consumption was 105.9 MB. Max. memory is 7.1 GB. [2020-09-14 12:51:53,974 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 745.47 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 102.0 MB in the beginning and 164.5 MB in the end (delta: -62.6 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 57.85 ms. Allocated memory is still 204.5 MB. Free memory was 164.5 MB in the beginning and 162.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.07 ms. Allocated memory is still 204.5 MB. Free memory was 162.6 MB in the beginning and 161.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 460.84 ms. Allocated memory is still 204.5 MB. Free memory was 161.3 MB in the beginning and 140.8 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40903.64 ms. Allocated memory was 204.5 MB in the beginning and 407.4 MB in the end (delta: 202.9 MB). Free memory was 140.1 MB in the beginning and 237.1 MB in the end (delta: -97.0 MB). Peak memory consumption was 105.9 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 - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 40.7s, OverallIterations: 59, TraceHistogramMax: 5, AutomataDifference: 16.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 901 SDtfs, 2428 SDslu, 3534 SDs, 0 SdLazy, 3810 SolverSat, 1596 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1778 GetRequests, 634 SyntacticMatches, 53 SemanticMatches, 1091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 14.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=57, 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, 58 MinimizatonAttempts, 952 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 1602 NumberOfCodeBlocks, 1602 NumberOfCodeBlocksAsserted, 196 NumberOfCheckSat, 1473 ConstructedInterpolants, 0 QuantifiedInterpolants, 86797 SizeOfPredicates, 346 NumberOfNonLiveVariables, 5122 ConjunctsInSsa, 560 ConjunctsInUnsatCore, 111 InterpolantComputations, 5 PerfectInterpolantSequences, 0/900 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 incorrect! Received shutdown request...